Rely on An Accountable PCB Terminal Block Supplier from China

PCBMay is your go-to source for all of your PCB Terminal Block and Printed Circuit Board demands. We’ve been around for a long while in the PCB industry.

  • Our PCBs and PCB components all meet IPC Class 2 or 3 requirements.
  • For your PCB needs, there is no minimum order.
  • Guaranteed on-time delivery anywhere in the world.
  • Before placing a larger order, you can get a free sample.
  • Your complete satisfaction is assured.
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PCBMAY PCB Terminal Block — The Cost-Effective Choice

We look after you by prioritizing the PCBs you require. Related to this, we offer a comprehensive choice of PCB Terminal Block products of premium quality, requisite for any digital business application.

Customer service is paramount at PCBMay. We can provide you with any sort of PCB Terminal Block for your circuit board. Also, we make other types of PCBs including CEM-3 PCBs, Fiberglass PCBs, and the more common assortment of FR4 PCBs.

With us, you can place any Custom PCB order related to PCB Terminal Blocks.

It’s now time to contact PCBMay!

Types of PCB Terminal BlockWe Can Provide

5G PCB Terminal Block

Since 5G has been implemented, the demand for 5G PCB Terminal Block has risen. PCBMay can manufacture enough 5G PCB Terminal Block for your bulk orders.

Computer PCB Terminal Block

PCBMay’s Computer PCB Terminal Block fits in all types of computers. We have Motherboard PCB, Laptop PCB, and CPU PCB as well. You can specify plug-in terminal block-type.

Digital PCB Terminal Block

To create the Digital PCB Terminal Block, Gold and OSP are some of the premium materials utilized. These materials make the PCB hardier–more resistant to fracture.

FR4 PCB Terminal Block

The FR4 PCB Terminal Block is considered the most pragmatic of all PCB Terminal Blocks. Less costly than FR5, our FR4 PCBs are constructed with epoxy-laminated sheets.

High Current PCB Terminal Block

The High Current PCB Terminal Block line can encompass extruded Terminal Blocks, as well as the modular variety. High Current PCBs are often deployed in power applications.

Multilayer PCB Terminal Block

Multilayer PCB Terminal Block is more cost-effective than its double-sided version. Durability and adaptability are two benefits. Used in HDI applications.

PCBMay: A Notable PCB Terminal Block Producer

We show you our manufacturing facility and production process for PCB Terminal Blocks to give you a sense of PCBMay’s commitment to the highest quality. The cleanliness and orderliness of our ISO 14001 certified plant are highlighted in this video.

Repeat orders from customers who are happy with their Terminal Blocks orders are what keeps our business going. In addition, we are a large-scale manufacturer of the most common types of PCBs used in commercial applications.

Because of our capacity to produce on time and on demand, PCBMay receives orders from all around the world. Our PCB Terminal Blocks are also reasonably priced.

VPC Plating Line

Related PCB Terminal Block

Flex PCB Connector
Flex PCB Connector
Of all Flex PCB Connector products, these are mainly used to connect Flex and Rigid parts.
Guitar Amp PCB
Guitar Amp PCB
Most Guitar Amp PCBs are customized products. They use manual point-to-point circuit board construction.
Fiberglass PCB
Because of robustness, there is regular usage of Fiberglass PCB on multilayer, single and double-layer boards .
Blank PCB
Blank PCB
PCBMay’s Blank PCB do not have any components attached to it. Also called Blank Copper PCB.
Box Build Assembly
Box Build Assembly
More customers request Box Build Assembly to integrate multiple boards into one piece of useful equipment.
Dishwasher PCB
Dishwasher PCB
The Dishwasher PCB can be geared for industrial use or consumers, it is a multilayer board.
Direct Bonded Copper
Direct Bonded Copper
The positive advantage of Direct Bonded Copper PCBs is capability to handle high frequency and interconnects.
Elevator PCB
Elevator PCB
Some advanced Elevator PCB applications include those used for material handling, cargo, logistics and smart elevators.

PCB Terminal Block Production Details As Following Up

Brown Oxide
PTH Line
VCP Plating   AOI  Exposure E-Test
Layer Count1-40layers
Base MaterialKBShengyiShengyiSF305FR408FR408HRIS410FR406GETEK370HRIT180ARogers4350BRogers4000PTFE Laminates(Rogers seriesTaconic seriesArlon seriesNelco series)Rogers/Taconic/Arlon/Nelco laminate with FR-4 material(including partial Ro4350B hybrid laminating with FR-4)
Board TypeBackplane、HDI、High multi-layer 、blind&buried PCB、Embedded Capacitance、Embedded resistance board 、Heavy copper power PCB、Backdrill.
Board Thickness0.2-5.0mm
Copper ThicknessMin. 1/2 OZ, Max. 10 OZ
PTH Wall25um(1mil)
Maximum Board Size1100*500mm(43”*19”)
Min laser drilling size4mil
Min. Spacing/Tracing2.7mil/2.7mil
Solder MaskGreen, Black, Blue, Red, White, Yellow,Purple matte/glossy
Surface TreatmentFlash gold(electroplated gold)ENIGHard goldFlash goldHASL Lead freeOSPENEPIGSoft goldImmersion silverImmersion TinENIG+OSP,ENIG+Gold finger,Flash gold(electroplated gold)+Gold finger,Immersion silver+Gold finger,Immersion Tin+Gold finger.
Min. Annular Ring3mil
Aspect ratio10:1(HASL Lead freeHASL LeadENIGImmersion TinImmersion silverENEPIG);8:1(OSP)
Impedance control±5ohm(<50ohm), ±10%(≥50ohm)
Other TechniquesBlind/Buried Via
Gold Fingers
Press Fit
Via in Pad
Electrical Test

Here there’re many laminate material datasheets, they’re useful and helpful for you, please see them:

TU-872Modified EpoxyDOWNLOAD2003403.8-4.03.8
RO 3010Cer/PTFEDOWNLOAD50010.2
RO 4003Hydrocarbon/CerDOWNLOAD>2804253.38
RO 4350BHydrocarbon/CerDOWNLOAD>2803903.48
RT/duroid 5880PTFE/GlassDOWNLOAD5002.2
ISOLAPolyclad 370HRFR4DOWNLOAD1703404.8-5.1
HitachiMCL-BE- 67GModified EpoxyDOWNLOAD1403404.94.4
MCL-LX-67YSpecial LaminateDOWNLOAD185-195325-3453.4-3.6
NelcoN4000-13Modified EpoxyDOWNLOAD210-2403653.73.6
N4000-13EPModified EpoxyDOWNLOAD210-2403503.43.2
N4000-13SIModified EpoxyDOWNLOAD210-2403503.43.2
N4000-13EP SIModified EpoxyDOWNLOAD210-2403503.43.2
ArlonArlon 25NCerDOWNLOAD2603.38
Arlon 25FRCerDOWNLOAD2603.58
Arlon 33NPolymideDOWNLOAD>2503534
Arlon 35NPolymideDOWNLOAD>2503634.2
Arlon 85NPolymideDOWNLOAD2503874.2
StablcorST325DOWNLOADThermal conductivity:75w/m.k(with 1oz copper)
ST10DOWNLOADThermal conductivity:325w/m.k(with 1oz copper)
Bergquistht-04503DOWNLOADThermal conductivity:2.2w/m.k(with 1oz copper)


PCBMay offers flexible shipping methods for our customers, you may choose from one of the methods below.

1. DHL

DHL offers international express services in over 220 countries.
DHL partners with PCBMay and offers very competitive rates to customers of PCBMay.
It normally takes 3-7 business days for the package to be delivered around the world.

DHL Forwarder

2. UPS

UPS gets the facts and figures about the world’s largest package delivery company and one of the leading global providers of specialized transportation and logistics services.
It normally takes 3-7 business days to deliver a package to most of the addresses in the world.

UPS Forwarder

3. TNT

TNT has 56,000 employees in 61 countries.
It takes 4-9 business days to deliver the packages to the hands
of our customers.

TNT Forwarder

4. FedEx

FedEx offers delivery solutions for customers around the world.
It takes 4-7 business days to deliver the packages to the hands
of our customers.

Fedex Forwarder

5. Air, Sea/Air, and Sea

If your order is of large volume with PCBMay, you can also choose
to ship via air, sea/air combined, and sea when necessary.
Please contact your sales representative for shipping solutions.

Note: if you need others, please contact your sales representative for shipping solutions.

On our website you can use the following payment methods:

Telegraphic Transfer(TT): A telegraphic transfer (TT) is an electronic method of transferring funds utilized primarily for overseas wire transactions. It’s very convenient to transfer.

Bank/Wire transfer: To pay by wire transfer using your bank account, you need to visit your nearest bank branch with the wire transfer information. Your payment will be completed 3-5 business days after you have finished the money transfer.

Paypal: Pay easily, fast and secure with PayPal. many other credit and debit cards via PayPal.

Credit Card: You can pay with credit card: Visa, Visa Electron, MasterCard, Maestro.

    Depend on PCBMAY for All Your PCB Terminal Block Needs

    PCB Terminal Block PCBs are required in the PCB industry. The majority of PCBMay’s customers, however, utilize this critical component due to the need to employ data, power, and signal connection in PCBs. We promise to get you the best deal possible.

    • Permits minimum dielectric loss
    • Soldering without the use of lead materials
    • Components connected in a secure and well-organized manner.
    • Connections are strong, semi-permanent
    • When necessary, it’s simple to swap out connectors

    We’ve made PCBs with PCB Terminal Block connections before, and we know what we’re doing. PCBMay has over twelve years of experience in the PCB industry and can produce a wide range of PCBs for a variety of commercial applications.

    Automotive, biomedical, aerospace, and and defense industries are among our clients. We manufacture Wearable Device PCBs, Bluetooth PCBs, and a variety of other circuit boards. In this digital age, everyone requires the services of a professional PCB manufacturer.

    PCBMay’s products are not only competitively priced; they also meet international requirements such as REACH and RoHs. Don’t worry about PCB Terminal Block safety regulations; our facilities strive for continuous improvement. After all, PCBMay has a solid name to uphold.

    You may quickly contact us using our straightforward communication channels — you can email, call, or chat with us right here. We will respond to you 24 hours a day, 7 days a week, no matter where you are in the world. We value collaborations with successful enterprises like yours, thus we take care of your PCB Terminal Block business.

    So, don’t hold your breath any longer! Connect with PCBMay to get your business back on track. For PCB Terminal Block orders, give us a call right now!

    PCB Terminal Block: The Complete FAQ Guide

    PCB is such a thing that always needs to be connected with external peripherals. In this situation, the PCB terminal block comes.

    Terminal blocks are connectors that connect the PCBs with other output, and input devices, power sources, and others.

    Connectors are available in different types, sizes, and shapes. Improper terminal blocks may cause damages to the PCB connections. Poor connector quality may cause fire, and destruction of the electronics.

    So, there are many facts to know about PCB terminal blocks. In this entire article, we will be answering some most essential questions about terminal blocks. These will help you to gain precise information about PCB terminal blocks, we believe.

    What Is A PCB Terminal Block?

    PCB terminal blocks are connectors that are mounted in PCBs and secure the connections of wires from the outer side to the PCBs. Wago PCB terminal block connectors provide safety between the connection of wires. Terminal blocks are formed in a linear arrangement in a long stripe.

    PCB Terminal Block

    PCB Terminal Block

    PCB screw terminal blocks allow safe transmission of PCB signals, power, and data. As the Phoenix contact PCB terminal blocks are space-saving, they are highly preferable for numerous electrical applications.

    You may connect your printed circuit boards (PCBs) to ground, switches, or electrical power connections using a PCB terminal block. Essentially, copper alloys are contained inside the terminal blocks, which are protected by high-grade polymers.

    The use of PCB terminal blocks prevents the connections from becoming loose. Additionally, high expansion rates of the metal connections should be avoided as much as possible.

    Electronic blocks and connectors are other names for printed circuit board terminal blocks. Terminal blocks, on the other hand, prevent oxidation at the point of connection between two wires.

    What Is The Purpose Of A Terminal Block In PCB?

    A terminal block is designed and made for allowing multiple connections of wire in a single connection point. It is the most feasible and convenient way to establish wired connections.

    Terminal Block Are Used To connect The Wires

    Terminal Block Are Used To connect The Wires

    SMD PCB terminal blocks make a common point for the connections which receive the same charges. On the other hand, terminal blocks do not take up more space as well.

    Also, another big purpose of using PCB terminal blocks is reliability and versatility. In electronics, changing or modifying connections are common occurrences. So, terminal blocks allow easy changing of the connections.

    Also, to keep the wire connection more stable and safe, PCB pluggable terminal block connectors are used.

    What Are The Notable Features Of PCB Terminal Blocks?

    You will find the following notable features in PCB terminal blocks.

    Terminal Block Facilitates Connection Break

    Terminal Block Facilitates Connection Break

    • PCB pluggable terminal block connector with wire connection facilitates the connection to break. This facility is allowable without any unwiring, testing, enabling quick disconnection, or maintenance. Also, the pluggable terminal sometimes offers a single connection removing facility in the entire connection block.
    • Installing the stackable terminal blocks adjacent to one another is possible. This will free up some space. Rail-mounted devices are what they are referred to as.
    • LED indications may be present in the gadget if all of the connections are made. The LED will illuminate to show whether or not electricity is flowing through the components.

    How To Mount The PCB Terminal Blocks On PCB?

    PCB terminal blocks are easy to mount on the PCB board. You just need the terminal blocks, solder iron, drill machine( in need of), and solder.

    PCB terminal blocks are available in different sizes with different numbers of pins. Here we will show you how you mount a PCB terminal block 2.54 mm. It is a two-pin terminal block. Also, the most basic one as well.

    Mounting PCB Terminal Block Is Feasible

    Mounting PCB Terminal Block Is Feasible

    There is no hassle actually. Take the block, and place the pins into the through-holes of the PCB board where you want to mount it.

    If your block pins aren’t compatible with the PCB holes, you need to expand the board holes with the help of the drill machine.

    After expanding the holes, insert the pins, and solder them on the opposite side of the board. Be careful during the soldering so that you won’t damage or ling the other holes that are conductive.

    The following video may help you to understand how to mount the PCB terminal blocks on the PCB boards.


    On the other hand, if you choose the PCB screw terminal block to install, after installing, make sure you properly tighten the screws. You have to use screw clamps to fit the screw terminal block on your PCB.

    What Are The Types Of PCB Terminal Blocks?

    You will see that the connector PCB terminal block types are divided based on two different segments. These are Structure types and Device types.

    Structure Types

    In structure types, the PCB terminal is also divided into three types. They are as follows.

    Single Feed-Through Terminal Block

    Single Feed-Through Terminal Block

    • Single Feed-Through: Single types are the basic PCB terminal types. These are used for wire-to-wire connections. It holds one input point and an output point. Two wires from distinct sides join as input, and output in the single feed terminal.
    • Dual-Level: The contacts on a dual-level terminal are on two levels. This terminal block saves space with this configuration. Wiring is also becoming more streamlined. Outer devices with several levels may be simply linked to the PCB, increasing circuit flexibility. The dual-level layout serves as a link between the devices.
    • Three-Level Terminal: It’s almost the same as the dual-level terminal with an extra stack of blocks. You also can use this as the bridge.

    Device Types

    You will see that the PCB terminal blocks are also divided based on device types. They are as follows.

    • Fuse Holder: The fuse holder connects multiple fuses that are related to many devices. It is safe because, during any short circuit, only the fuse section will be affected.
    • Ground Circuit Terminal: Ground terminals basically are used for grounding the devices.
    • Thermocouple Block: The thermocouples, which are used to monitor temperature, have a reliable metal connection.
    • I/O Block: Ensures connection between the devices and the controllers.
    • Power Distribution disconnects power lines.
    • Sensor Block: Manages three or more wire devices. The devices include proximity and photoelectric sensors.
    • Disconnect Block: Also known as a switch block that helps to disconnect the connections using a knife.

    What Are The Applications Of PCB Terminal Blocks?

    Terminal blocks are most often seen on the control panel, where they serve many functions. They are also extensively used in the industrial sector. Terminal blocks for printed circuit boards (PCB) need industrial equipment such as wired support boxes and control boxes.

    Control Panel With Terminal Blocks

    Control Panel With Terminal Blocks

    The terminal connection blocks will be found in the following pieces of equipment in industrial environments.

    However, if you want to utilize the PCB terminal block in your application, you must first select the block types that will be used depending on your requirements. Because there are several sorts of terminal blocks accessible, you may mix and match.

    The blocks are not set in terms of how they are used. You can only know which ones are which after you have your gadget ready. You must choose the block type depending on the device kinds that are available.

    What Are The Advantages Of A PCB Terminal Block?

    Terminal blocks are highly advantageous, no doubt. Cost-cutting is the most significant advantage of the PCB terminal blocks.

    Aside from this, there are vast advantages that you will get by using the terminal block connectors. They are as follows.

    Space Saving

    Terminal blocks are space-saving. You could be able to save up to 50% space on your control panel by using multilayer PCB terminal blocks.

    PCB Terminal Blocks Are Space-Saving

    PCB Terminal Blocks Are Space-Saving


    Terminal blocks are safe. No short circuit, not electric shock possibilities. Also, connections are highly safe from disconnecting possibilities.

    Easy Installation

    Installing PCB terminal blocks is just easy to install. A screw-driver, or just a little soldering is enough.

    Copper Alloy

    The copper alloy that is used in the block terminals has the same coefficient of expansion of the wires that are connected. It helps to keep the connection tight even when the coefficient of expansion happens.

    How Do You Wire The PCB Terminal Block?

    There are different types of terminal block connections. Phoenix contact PCB terminal block and Wago PCB terminal block facilitate the following types of wire connections.

    PCB Screw Terminal Block

    This is the most basic and simple type of connection. You just need to insert the wire into the terminal and tighten up the screw properly.

    PCB Spring Terminal Block

    It is the fastest way to connect and disconnect the wires. They are very safe, sturdy, and secure. First, take a precision screwdriver, and insert it into the spring case. Then insert the wire into the hole under the spring case mount. Then simply pull back the screwdriver.

    Before removing the screwdriver, make sure you entirely entered the wire into the case.

    Push-In Terminal (PIT)

    It is a tool-less connection type. You don’t need to use any tool to connect the wire to the terminal. For this connection, you need to add a ferrule on the head of the wire. Just push the wire to insert it into the terminal cage. The connection is tightly established.

    Push-In Terminal Block

    Push-In Terminal Block

    To remove the connection, push the spring beside the connection with a screwdriver, and pull back the wire out.

    Fast Connect

    It is a gas-sealed connection that allows the operators to terminate the wire without the need for stripping the insulation.

    Take the wire and insert the head into the right terminal. Take a precision screwdriver, and insert it into the slot. Pry that terminal back to the center of the terminal block. This displaces the terminal block to properly insulate the wire in the middle.

    How To Design A PCB Terminal Block?

    You have to design a PCB terminal block based on its termination options, orientation, contact, and wire specification.

    You have to ensure them properly to successfully design a terminal PCB.

    Termination Options

    Termination options are the way you want to connect the wires. That means the wiring methods. There are different types of termination options that are in your hand to design.

    As we mentioned before, screw terminal block, push terminal block, spring terminal block, insulation terminal blocks are some of them.

    PCB Terminal Block Have Different Types Of Termination Options

    PCB Terminal Block Have Different Types Of Termination Options

    Aside from them, a tab or barrier or blade terminal is another option.


    It is necessary to keep the wire insertion angles of the terminal block constant. There are three alternative options, but the set angles are kept across each. There are three of them: 45°, 90°, and 180°. The 90° angle is referred to as horizontal, whereas the 180° angle is referred to as vertical.

    Consequently, the maker must design his terminal block orientation-based structure and the sort of devices he intends to use.

    Contact And Wire Specification

    Contact refers to the status of the wire’s connection to the terminal while it is in this state. When designing a PCB terminal block, it is important to consider the number of contacts that will be required.

    As a result, you must ensure that the number of contacts and the number of wires required for the connections are equal.

    The phrase “contact pitch,” on the other hand, refers to the distance between each of the contacts in a circuit. It is determined by measuring the distance between the centers of each touch. It is certain that the number of contacts and the number of contact pitches must be the same.

    The pitch of the contact is measured in millimeters. 3.5mm, 3.81mm, and 5mm contact pitches are the most frequent and conventional PCB terminal block contact pitches; nevertheless, they may be as high as 10.16 mm.

    Terminal blocks are created depending on the size of the conductor or wire that is being used. American Wire Gauge(AWG) is the name given to the wire gauge standard used in North America. The lesser the AWG number, the smaller the diameter of the wire.

    Here is a good example of efficient PCB terminal blocks in the following video.


    What Are The Challenges Of Designing PCB Terminal Blocks?

    During the designing phase, you have to face some challenges to ensure the best quality of the PCB terminal blocks.

    The quality of the terminal blocks depends on the plastic insulation ability and the conductive parts. If they fail, the entire project might fail.

    So, it is highly sensitive and essential to prevent the failure of the plastic quality and conductive copper quality. In the prevention of failure, you might face three common faults of the terminal blocks. They are as follows.

    Poor Contact

    The metal conductive part of the terminal is the key player of the terminal. It provides the transportation of voltage, or signal from the external wire to the internal wire or other parts.

    The PCB Terminal Block Contact Must Be Sturdy

    The PCB Terminal Block Contact Must Be Sturdy

    So, the contact must be excellent and highly durable. The structure must be compatible with the utmost challenging environment. Because poor structure brings poor contact ability.

    Poor Insulation

    The plastic insulator’s primary function is to keep the contact in the proper location. It also protects the contact from the contact and the contact from the housing. As a result, the mechanical and electrical qualities of the plastic insulator must be outstanding.

    It must also provide the highest level of process control.


    The contact is centered and protected by the insulator. The insulator is also responsible for the mounting and locking devices.

    As a result, weak connections or repairs may cause the terminal block system to fail severely. As a result, the contact must be rigid and cannot be cranky.

    How Do You Test The PCB Terminal Block?

    Terminal block tests go through different phases. You need to check different entities to ensure the full checking of the PCB terminal blocks.

    Electrical Test

    With the electrical test, you will get the electrical current flow state of the terminal. Along with this, you also need to check terminal block efficiency, voltage drop, electrical disruptive discharge, creepage distance, and insulating properties.

    Electrical Test Ensure The Electrical Current Flow Of Terminal Blocks

    Electrical Test Ensure The Electrical Current Flow Of Terminal Blocks

    Derating Of Connectors

    The derating connection curve depicts the terminal’s current carrying capability. The functions for ambient temperature and nearby contacts are shown here. Derating connections are affected by the insulating housing and the contact material.

    To assess the current carrying capacity, you must choose from a number of position layouts that are electrically connected in series. Conductors are required in this case. For the test of the current-carrying capability of the PCB mount terminal block, you must adhere to DIN EN 60512-5-1.

    Test Of Temperature Rise

    When the temperature of the PCB terminal block rises as a result of the Joule effect, it is critical to limit the temperature to a bare minimum.

    Also important is that the contact resistance is kept to a minimum. With the help of this test, you will be able to calculate the rate at which the temperature rises at room temperature.

    Dielectric Test

    The dielectric test is carried out in order to determine the proper distance between two adjacent terminal blocks of the same kind. In order to ascertain this, you must apply the proper test voltage.

    What Is The Connection Technology For Data Transmission In The PCB Terminal Block?

    Modern printed circuit board terminal makers are expanding and enhancing the terminal block technology in order to advance efficient data transfer while maintaining cost-effectiveness.

    A 4-position terminal block for the connecting of twisted-pair wires is one example of a product made by the Phoenix contact PCB terminal block company. They use a cross-sectional area ranging from 0.14 to 4 mm2. The majority of the time, spring or screw connections have been used.

    Terminal Block Data Transmission Technology Has Been Developed For Better Performance

    Terminal Block Data Transmission Technology Has Been Developed For Better Performance

    With the help of the printed or color-coded connection points, you can quickly identify the connection that allows for the most efficient assignment of conductors.

    The terminal blocks are used to connect conductors in a horizontal, vertical, or angled fashion. The compatibility of the terminal blocks with a wide range of devices is made easier as a result of this.

    Data transfer is made safe and secure using Phoenix’s all terminal connections, which are appropriate for CAT5. These are in accordance with the EN 50173 and ISO/IEC 11801 international standards.

    Additionally, certain comprehensive versions are acceptable for usage in the explosives industry as well. They were authorized under the IEC 60079-7 standard.

    How Do You Choose The Right PCB Terminal Block?

    Though the terminal block seems to be a small fact, choosing the right one is one of the complex tasks. There are different entities that are there to consider before choosing the PCB terminal blocks for your PCB connections.

    You Have To Determine Your Requirements First For Choosing PCB Terminal Blocks

    You Have To Determine Your Requirements First For Choosing PCB Terminal Blocks

    Current Requirement

    The most significant factor to examine is the existing necessity. It is because the electricity is flowing constantly via the terminal.

    As a result, unequal distribution of current may result in overheating. This has the potential to cause problems, if not a complete failure, at the terminal.

    As a result, before selecting a terminal block, ensure that it is compatible with the greatest current flow that you need. In reality, you should choose a terminal that has a current capacity of 50 percent more than the current you want to use.

    Voltage Requirement

    As with the current flow, voltage is another important fact to be accounted for. High voltage also can cause destruction if you don’t choose the compatible voltage range for the terminal blocks.

    Wire Consideration

    All wires are not the same. And they all don’t provide the same quality as well. Choose the wire that fulfills your particular needs regarding the particular terminal block.

    Mechanical Properties

    Choose the terminal structure that is mechanically strong. Because a different environment impacts differently on the structure of objects. So, the structure of your terminal must withstand any extreme environment.

    What Is A PCB Barrier Terminal Block?

    Barrier PCB Terminal block is one type of the popular connector PCB terminal block type.

    Barrier terminal block allows you to use a ring or spade at the end of the wire. This type of terminal block is used in the rail or transportation industry.

    Barrier Terminal Block

    Barrier Terminal Block

    Actually, where vibration is a common phenomenon, the barrier terminal block is suitable for that situation.

    Wiring method of Barrier Terminal Block:

    Take the wire with a ring or spade on the wire. Push out the lever and insert the ring into the bolt of the barrier terminal block. Now, lock back the lever to tighten up the connection.

    How To Compare Between 3 Pin And 2 Pin PCB Terminal Blocks?

    3-Pin PCB Terminal Block

    3-pin terminal blocks are side-entry. They have pitches length of 0.1”, which means PCB terminal block 2.54 mm. On the other hand, each block has three terminals to connect wires. The ends are designed with 26-18 AWG wires.

    3-Pin Terminal Block

    3-Pin Terminal Block

    3 pin blocks are rated for 150V and 6 amp.

    2-Pin PCB Terminal Block

    The two-pin PCB terminal blocks may accommodate two terminals. They are made of 22-14 AWG wires that have been stripped. The terminal blocks with two pins are rated for 250 V and 16 amps.

    On one side of the 2-Pin terminal, there is a ridge to hold the pins in place. On the opposite side, there is a slot that facilitates the sliding and locking of the terminal. The terminal block may be used in either of two orientations. One kind of entrance is side-entry, while the other is top-entry.


    PCB terminal blocks are necessary to ensure the safest and secured wire connections. That also ensures the proper electric power and the current flowing through the connection points.

    However, choosing the right terminal block is an essential fact as it impacts the power supply rate, voltage, and current. All are related to the performance of the PCB-enabled devices and wires.

    So, before using and designing the terminal blocks, understanding the basics of them is essential. It will save you money, and time.

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