9 best terminal blocks

Terminal blocks are crucial components in electrical and electronic systems, particularly in industrial and commercial applications. They play a vital role in providing a secure and organized means of connecting and distributing electrical power and signals. Terminal blocks are typically used for wiring connections and serve as an interface point for various electrical devices and components. Here are some key aspects of terminal blocks:

  1. Purpose: Terminal blocks serve as connection points for electrical conductors, allowing for the easy and organized termination of wires or cables. They facilitate the distribution of power, signals, and control circuits within machinery, control panels, and industrial equipment.

  2. Types: There are various types of terminal blocks, including:

    • DIN Rail Terminal Blocks: These are commonly used in industrial settings and are designed to be mounted on standard DIN rails for easy installation and maintenance.

    • Barrier Terminal Blocks: These have insulating barriers between each terminal to prevent short circuits and ensure a higher level of safety.

    • Feed-Through Terminal Blocks: These allow wires to be inserted from both sides, providing a convenient way to daisy-chain connections.

    • Ground Terminal Blocks: Specifically designed for grounding applications to ensure safety and electrical integrity.

    • Disconnect Terminal Blocks: Equipped with a disconnect lever or button for quick and safe disconnection of wires.

  3. Construction: Terminal blocks are typically made of materials such as thermoplastics or thermoset plastics, which offer good insulation properties and can withstand a wide range of temperatures. The terminals themselves are often made of metal, such as copper or aluminum, to ensure good electrical conductivity.

  4. Wire Connection Methods: Terminal blocks use various methods for wire connection, including screw terminals, spring clamp terminals, push-in terminals, and insulation displacement connections (IDC). The choice of connection method depends on factors like ease of installation, maintenance, and the specific application.

  5. Labeling and Marking: To ensure clarity and ease of identification, terminal blocks often have labeling options. This can include numbered or color-coded terminals, as well as space for attaching labels or markers.

  6. Voltage and Current Ratings: Terminal blocks come in various voltage and current ratings to accommodate different electrical requirements. It's crucial to select the right terminal block that matches the application's voltage and current specifications.

  7. Applications: Terminal blocks are used in a wide range of industries, including manufacturing, automation, energy distribution, transportation, and building infrastructure. They are essential for connecting sensors, switches, relays, motors, and other electrical components.

In summary, terminal blocks are essential components in electrical and electronic systems, providing a secure and organized way to connect and distribute electrical power and signals. They come in various types, construction materials, and wire connection methods to meet the specific needs of different applications in industrial and scientific settings.

Below you can find our editor's choice of the best terminal blocks on the market
  

KeeYees 60pcs 5mm Pitch 2 Pin & 3 Pin PCB Mount Screw Terminal Block Connector for Arduino (50 x 2 Pin, 10 x 3 Pin)

KeeYees

Based on 332 reviews Check latest price

Product description

KeeYees: Best choice in various Electronic Modules & Components, DIY Parts and Tools to support your work and design challenges from Home, School to Industrial applications!



Parameter:

Pin number: 2 Pin and 3 Pin

Pitch: 5mm

Rated voltage: 300V

Rated current: 10A. 

For wire size: 14-22AWG

Material : ABS Plastic, Electric Parts

Colour: blue



Package include:

50 x 2 Pin Screw Terminal Block

10 x 3 Pin Screw Terminal Block

  • 2 pin & 3 pin
  • Pitch: 5mm
  • Rated Value: AC 300V, 10A
  • For wire size: 14-22AWG
  • Package include: 50pcs 2 Pin Screw Terminal Block Connector ; 10pcs 3 Pin Screw Terminal Block Connector

User questions & answers

Question: What hole size (diameter) should be used on the pcb
Answer: I measured them at 0.9mm with cheap digital calipers, I'm going to design my board with 1.0mm holes and hope for the best.
Question: Has anyone used these on breadboards? Are the pins long enough to seat well
Answer: Yes, these pins are long enough to be used on breadboards

Dinkle UL Every Color DIN Rail Terminal Block Kit 20 DK2.5N 12 AWG Gauge 20A 600V Ground DK4N-PE Jumper DSS2.5N-10P End Covers End Brackets

Dinkle

Based on 99 reviews Check latest price

Product description

This is a standard two of each color sample pack.The ten colors that come in this pack include: Beige, yellow, white, green, red, gray, black, orange, brown or blue. Items will be shipped out as pictured.Technical Data (UL) Rated Voltage: 600V Rate Current: 20A Conductor Cross-section, Solid (AWG): 22-12 Conductor Cross-section, Flexible (AWG): 22-12 Rated Impulse Withstand Voltage: 6KV Torque (N-m): 0.4 Screw: M2.5 Wire Strip Length: 9-11mm Insulating Material: PA TxHxW (mm): 5.1 x 39.6 x 40.35 (Individual Blocks) DIN Rail (mm): 35, 32 Jumper/Bridge: Press-fit/Insertion. This kit includes 20 DK2.5N Dinkle terminal blocks, 4 SS2 end brackets, 2 DK4NC end covers, 2 DSS2.5N-10P press-fit jumpers, 2 DK4N-PE Ground Blocks, 2 DK2.5NC-PE ground block covers, and a 8" piece of aluminum RoHS rail.

User questions & answers

Question: are these blocks suitable for marine applications (high humidity, etc
Answer: We have plenty of customers that use these terminal blocks in yachts. Although, I believe that many of them are in conditioned air environments. Unlike our "marine" terminal blocks, all of the metal parts are not nickel plated in this kit. So, constant salt water exposure may be detrimental to the lifespan of these blocks. Kindest regards, Clayton International Connector, Inc.
Question: Can it handle 240 volts ac
Answer: Absolutely. The Dinkle DK2.5N block is UL rated to handle 600 volts AC. Kindest regards, Clayton International Connector, Inc.
Question: would you get a secure fit if you were to go down one wire size, say 12 gauge DIN block but use 14 gauge wire
Answer: 12 gauge is the maximum size, not the only size. They will work just fine with 14 gauge. I've used all the way down to 24 gauge without trouble.

URBEST Terminal Block Barrier Strip 5Pack Dual Row 600V 25A 8 Position Screw Block and 10Pack 8 Postion Pre-Insulated Fork Terminal Strip Black/Red 400V 25A

URBEST

Based on 50 reviews Check latest price

Product description

Specifications:



Barrier Terminal Block:

Material : Metal, Plastic

Screw: Zinc Plated Iron

Block Size : 115 x 30 x 19mm/ 4.53" x 1.18" x 0.75"

Rated Value : 600V, 25A

Model : TB-2508

Poles : 8P (Dual Row)

Color : Black

Removable Clear Plastic Insulating Cover, Screw Barrier Terminal Block.

Each pair of terminals is insulated from the next, prevent circuit in disorder.



Fork Terminal Stripe:

Rated Value : 400V, 25A

Positions : 8

Design : Fork Type

Material : PVC, Metal

Model : TB2508

The fork terminal stripe can be cut in any position to meet with your different demand, very handy

The furcate pre-insulated terminal is easy to connect with electrical wire to strengthen its reliability and safety.

Used widely in the machiney, electric power, railway, shipbuilding, aviation, home appliance, computer or other automatic equipments.

  • Terminal Block Species: Material:Copper,Plastic, Position:8(Dual Row), Size:115 x 30 x 19mm/ 4.53" x 1.18" x 0.75"
  • Fork Terminal Strip Species: Material : PVC, Copper, Design : Fork Type, Positions : 8, Size:93 x 90 x 23mm/ 3.66" x 3.54" x 0.79"
  • Terminal Stripe: Inside Width : 3.8mm/0.15";Outside Width : 6.3mm/0.24"; Pin Pitch : 2.7mm/0.1"; Fork Total Width : 93mm/ 3.66";Sleeve Total Width : 90mm/ 3.54"; Total Height : 23mm/ 0.9"
  • Convenient to use: The fork terminal stripe can be cut in any position to meet with your different demand, very handy
  • Package Included: 5pcs 8 position dual row terminal block, 10pcs 8 position insulated terminal strip((red:5, black:5). We provide a 30-day worry free warranty and easy to reach friendly customer service

User questions & answers

Question: What is the screw size
Answer: Havent use these yet but it appears to be a #8 metric equiv screw, 1/4 inch long. Cheap chinese stuff but will be ok for my hobby purposes.

Terminal Block White Screw Terminal Connector Dual Row Electric Barrier Block 12-Position Terminal Strip, 10 Amp 380 V (10)

Weewooday

Based on 7 reviews Check latest price

Product description



10 Pieces terminal block white screw terminal connector dual row electric barrier block 12-position terminal strip, 10 Amp 380 V



Features:



Nice performance:

These screw terminal blocks allow you to connect multiple items without having to solder or splice, bring you convenience. They are safe to use, suitable for motors, electrical control, household appliances, lighting, machinery and other electric wire connecting.



Specifications:

Material: copper, PP

Color: white

Suitable wire: 2.5 m㎡ wire

Voltage: 380V

Current: 10A

Weight: 155g



Package includes:

10 x Terminal blocks

  • Insulated flame-retardant shell: these block connectors adopt flame-retardant PP material shell, which feature with insulation, corrosion resistance and wear resistance; They can stand temperature between minus 40 to 150 degrees Celsius, have nice electrical conductivity
  • Crimping performance: the plated zinc alloy screws and copper-plated zinc alloy terminals have excellent stability and conductivity, can serve you for a long time
  • Easy to install: you juse need to strip the wires, and insert them into the terminal strip and tighten the screws, no need for troublesome welding; What's more, you can use scissors or other tools, cut the screw terminal block become small parts as you need
  • Multi-purpose: these dual row screw terminals can be applied for the link of lighting lamps, household appliances, electrical control, power supply, electrical maintenance, electrical machinery and more
  • Safe to use: the set screws secure wires reliable contact, and help prevent accidental contact with the terminals

Erayco DIN Rail Terminal Blocks Kit, 20Pcs UK-2.5N 12 AWG Terminal Blocks, 2Pcs Ground Blocks, 2Pcs Fixed Bridge Jumpers, 4Pcs End Brackets, 4Pcs End Covers, 4Pcs Marker Strip, 1Pcs 8" Aluminum Rail

Erayco

Based on 67 reviews Check latest price
  • 【Perfect DIN Rail Terminal Blocks Kit】Terminal blocks kit comes with 20pcs terminal blocks, 2pcs ground blocks, 2pcs jumpers, 4pcs E/UK end brackets, 4pcs UK-2.5BG end covers, 1pcs 8" aluminum RoHS Rail, 4pcs ZB6 Marker strip.
  • 【Terminal Blocks UK2.5B】The UK2.5B universal screw DIN rail terminal block series has the typical features which are decisive for practical applications. Made from engineering flame retardants nylon PA66 with brass screw metal.It can connect two conductors with ease, even large conductor cross sections are not a problem. Can be used on DIN Rail 35mm, steel or aluminum.
  • 【Ground Terminal Blocks Connectors】The grounding terminal blocks provide an easy-to-identify, convenient, neatly organized grounding bus that is mounted on the DIN rail.The protective terminal blocks has strong clamps to ensure tight fixation on DIN rails to achieve the PE function.
  • 【35MM Aluminum DIN Rail】 Mounting rails and brackets to enhance configuration and installation. Guide rails can be used to install circuit breakers, contactors, surge protectors, modular jacks, motor soft starters, PLC, relays, terminals and other electrical appliances.
  • 【Terminal Insertion Bridge, End Stopper Bracket, End Cover】The insertion bridge can be insert at the top clamp space of UK terminal blocks, potential distribution can be contact quickly using those bridges. UK series End Stopper Clamps are fastened using screws or simply snapped onto the DIN rail. End Cover Usage: Connection by screw tighten

User questions & answers

Question: Does this come with the plastic tabs for labels
Answer: No
Question: Can the jumper bar be modified to the number of desired positions? Or is that not the intended use
Answer: Yes. I did that in fact. Cuts real easily with wire cutters.
Question: What terminal block jumpers are recommended for these terminal blocks
Answer: This is the link of terminal block jumpers, https://www.amazon.com/dp/B07HMY1B4P
Question: what is ment by IEC 32A
Answer: The IEC recognises that the item is rated for 32A.
Question: The only two items i see with screws are the terminal block and bridging clips. i do not believe i can get 100 of either for $30. what is on offer
Answer: Contrary to your belief, you do get 100 terminal blocks for $30. A good deal. The required accessories, on the other hand, are not quite a good deal.
Question: Do you have end covers for this terminal block
Answer: This is the link of end covers https://www.amazon.com/dp/B07HMY1B4P

Product features

Erayco DIN Rail Terminal Block Kit

Giving you everything your project needs for less.

Package Included:

  • 20Pcs UK-2.5N 12 AWG Terminal Blocks
  • 2Pcs Ground Blocks
  • 2Pcs Fixed Bridge Jumpers
  • 4Pcs E/UK End Brackets
  • 4Pcs End Covers
  • 4Pcs Marker Strip
  • 1Pcs 8" Aluminum RoHS Rail

10pcs (5 Sets) 6 Positions Dual Row 600V 25A Screw Terminal Strip Blocks with Cover + 400V 25A 6 Positions Pre-Insulated Terminals Barrier Strip (Black & Red) by MILAPEAK

MILAPEAK

Based on 2 reviews Check latest price

Product description

MILAPEAK 10pcs (5 Sets) 6 Positions Terminal/Barrier Strips

A Simple and Secure Way to Make Numerous Connections.

Our terminal/barrier strips allowed you to connect each power wire very cleanly to each source (ground, battery, and ignition on). Great addition to any circuit board. That also include a clear cover to protect accidental touching of the terminal. It will be more safer when the terminals are protected by snap-in plastic "lids".

Make Things More Simple and Neat when Wiring.

Is it difficult to identify and follow the accessory power wires to the source? Our terminal strips really clean up that mess and the connections are really solid! These greatly simplified and neatened up your install.

Spcecification

1) 600V 25A 6P (Dual Row) Terminal Strips:

- Material: Brass, Plastic, Screw: Zinc plated Iron

- Size: 3.6x1.2x0.7inch (LxWxH)

- Color: Black

2) 400V 25A 6P Barrier Strip:

- Material: Brass, PVC

- Size: 2.6x0.9x0.08 inch (LxWxH)

- Fork Inside Width: 0.15 inch

- Fork Outside Width: 0.24 inch

Package Contents

- 5pcs 600V 25A 6 Positions Dual Row Screw Terminal Blocks with Cover

- 3pcs 400V 25A 6 Positions Pre-Insulated Terminal Barrier Strip (Black)

- 2pcs 400V 25A 6 Positions Pre-Insulated Terminal Barrier Strip (Red)

  • ★【Clean Installation】- How to clean up your cluttered battery terminals? Our terminal strips greatly simplified and neatened up your install. The pressure washer style terminal accepts a bare wire and the jumpers allow signals or power to be distributed neatly. This way you can easily disconnect a wiring branch without taking down the entire system.
  • ★【Heavy Duty】- Our terminal/barrier strips are well made sturdy and with quality and robust screws. You can crank down on these for a firm bite. These allowed you to connect each power wire very cleanly to each source (ground, battery, and ignition on). Great for compact wiring jobs.
  • ★【Protect Cover】- Our dual row screw terminal strips that also include a clear cover to protect accidental touching of the terminal. It will be more safer when the terminals are protected by snap-in plastic "lids". Be careful when mounting these covers.
  • ★【Easy Install】- The terminal strips are easy to install and held in place by two screw holes at either end of the terminal. Standard spade crimp type connectors work well and you have the option of of making 6 individual connections or by using the whole barrier bar or part of it up to 6 connections to a single line. Once the connections have been made, clear plastic covers are included that push lock into place to protect the terminals.
  • ★【What You Get】- 5 x 600V 25A 6 Positions Dual Row Screw Terminal Strips, 5 x 400V 25A 6 Positions Pre-Insulated Barrier Strips (Red: 2, Black: 3), our worry-free 12-month and friendly customer service. Also available 12 gauge,14 gauge, 16 gauge, 18 gauge, 20 gauge High Performance Silicone Wire in our store.

User questions & answers

Question: What is the size of the mounting screws
Answer: 6/32 screw X 1/2-3/4 long
Question: What is the center distance of the mounting holes of the 4 position 25 amp terminal block
Answer: For the 12 position strip it’s 4 1/2 in
Question: what size is the screw to know which connector to buy
Answer: B07Q2R1TGF the right size screw for 12-10awg wire B07Q2R23NR the right size screw for 16-14awg wire B07Q2XMKXZ the right size screw for 22-16awg wire
Question: what is the distance center to center of the mounting screws
Answer: B07Q2R1TGF the right size screw for 12-10awg wire B07Q2R23NR the right size screw for 16-14awg wire B07Q2XMKXZ the right size screw for 22-16awg wire

Product features

Heavy Duty

Our terminal/barrier strips are well made sturdy and with quality and robust screws. You can crank down on these for a firm bite. The shell is made with flame resistant material, more safer. Copper plate conductor has good electrical conductivity and also nickel plated has a better anti-oxidation performance which make it more durable. These allowed you to connect each power wire very cleanly to each source (ground, battery, and ignition on). Great for compact wiring jobs.

Protect Cover

Our dual row screw terminal strips that also include a clear cover to protect accidental touching of the terminal. It will be more safer when the terminals are protected by snap-in plastic "lids". Be careful when mounting these covers. The terminal strips are easy to install and held in place by two screw holes at either end of the terminal. Once the connections have been made, clear plastic covers are included that push lock into place to protect the terminals.

Clean Installation

How to clean up your cluttered battery terminals? Our terminal strips greatly simplified and neatened up your install. The pressure washer style terminal accepts a bare wire and the jumpers allow signals or power to be distributed neatly. This way you can easily disconnect a wiring branch without taking down the entire system. Standard spade crimp type connectors work well and you have the option of of making 6 individual connections or by using the whole barrier bar or part of it up to 6 connections to a single line.

MILAPEAK 10pcs (5 Sets) 6 Positions Terminal/Barrier Strips

Our terminal/barrier strips allowed you to connect each power wire very cleanly to each source (ground, battery, and ignition on). Great addition to any circuit board. That also include a clear cover to protect accidental touching of the terminal. It will be more safer when the terminals are protected by snap-in plastic "lids".

FIXITOK 6 Sets Terminal Blocks, 4/5/6 Positions 600V 15A Dual Row Screw Terminal Strip with 400V 15A Pre-Insulated Terminal Barrier Strip (Black & Red)

FIXITOK

Based on 132 reviews Check latest price

Product description

FIXITOK 4/5/6 Positions Double Row Electrical Terminal Block Strips with Pre-Insulated Barrier Strips



FEATURES

1.Come with 4/5/6 positions terminal blocks, satisfying your various wiring requirements.

2.Organize wires neatly and can be took off easily.

3.Protection cover to prevent electric shock.

4.House with polycarbonate with flame retardance.



SPECIFICATIONS

Terminal Block

Rated Voltage: 600V

Rated Current: 15A

Material: polycarbonate, nickel-plated copper

Size: 

54.5mm x 22mm x 17mm (4P Terminal Block)

63mm x 22mm x 17mm (5P Terminal Block)

72mm x 22mm x 17mm (6P Terminal Block)



Terminal Stripe

Rated Voltage: 400V

Rated Current: 15A

Material: plastic, nickel-plated copper

Size: 

30mm x 20mm  (4P Jumper)

39mm x 20mm  (5P Jumper)

48mm x 20mm  (6P Jumper)



BOX INCLUDED

2 x 4 Positions 600V 15A Terminal Block Strips

2 x 5 Positions 600V 15A Terminal Block Strips

2 x 6 Positions 600V 15A Terminal Block Strips

1 x 4 Positions 400V 15A Jumper Red

1 x 4 Positions 400V 15A Barrier Strip Jumper Black

1 x 5 Positions 400V 15A Barrier Strip Jumper Red

1 x 5 Positions 400V 15A Barrier Strip Jumper Black

1 x 6 Positions 400V 15A Barrier Strip Jumper Red

1 x 6 Positions 400V 15A Barrier Strip Jumper Black





CONTACT US

FIXITOK-US is all about quality and customer service. If need any help please contact us through e-mails. You can go to your order and find the order on the list, click contact seller button to contact.



  • PRACTICAL TERMINAL BLOCKS - Our double row screw terminal strips can help you to connect bare wires to avoid clutter, while jumpers allow signals or power to be distributed neatly, making wiring connection simpler and more efficient. With Fixitok’s screw terminal blocks, you can quickly disconnect a wiring branch without removing the entire system.
  • SAFETY DESIGN - Compared with traditional terminal strip blocks, ours’ come with protection covers to avoid accidental touching when use. We also provide red and black jumpers to help customers distinguish positive and negative wire when installation.
  • HIGH QUALITY MATERIAL - The 4/5/6 positions terminal blocks are made from polycarbonate with flame retardance and nickel-plated copper with excellent electrical conductivity and anti-oxidation performance, to keep working stably and extend lifespan.
  • EASY INSTALLATION - Installation is a breeze. There are two screw holes at each sides of the terminal blocks, you just need to fix them with screws and connect cables. We provide 3 kinds of terminal blocks (4/5/6 positions), to meet your different needs of wiring on machinery, electric power, home appliance, computer or other automatic equipment. For 8/10/12 positions, please search for B08D3J19FT on Amazon.
  • PACKAGE INCLUDED - 2 x 4 positions dual row terminal blocks, 2 x 5 positions dual row terminal blocks, 2 x 6 positions dual row terminal blocks, 2 x 4 positions jumpers, 2 x 5 positions jumpers, 2 x 6 positions jumpers. Terminal Blocks rated voltage/current: 15A/600V. Jumpers voltage/current: 15A/400V.

User questions & answers

Question: What size ring and spade connectors fit
Answer: Very small, like 1/4 inch or 3/16 diameter

Mofeez Bus Bar -3x1/4”Post,10x#8 Screw Terminal Power Distribution Block with Ring Terminals(Pair - Red & Black)

Based on 743 reviews Check latest price
  • PARAMETER-----10 stainless steel #8 terminal screws,3*1/4" studs.
  • WHAT YOU GET-----Cover attaches with nylon nuts to the two outside studs to protect against accidental short circuits. Come with 1/4” and #8 suitable insulated ring terminals.No need to find the small rings anymore.
  • RANGE FOR USE---- Max voltage:300VAC/ 48VDC. Max continuous amperage: 200AAC/250ADC. Max intermittent: 20 A per connection (less than 1 minute).
  • HIGH QUALITY FOR SAFE----- Nickle plated brass contact plate for low resistance ,maximum conductivity and protect against corrosion.
  • USE IN MULTIPLE OCCASIONS----- Mofeez busbar gives a neat and clean finish to any installation in your boat, car or caravan.Manufactured from robust ABS plastic for excellent strength and durability in even the harshest of environments.

User questions & answers

Question: Can i use this to power multiple 120vac led lights (total approx load is 12 amps ac) versus using a junction box? with cover on, is all ok code-wise
Answer: Yes, I used it indoor as a bus-bar for terminal connection with the cover in place. My total amperes were more than 60 AMP 380VAC.
Question: what size screw to mount these
Answer: These bus bars are metric. M6 for the large screw and M3 for the small ones.
Question: Can i run a winch and a led light bar off this
Answer: I run a 30 roadster off using it works great
Question: Am i reading it properly that this can handle 250a continuous for a dc system
Answer: That is the specs. I can tell you my experience with it. I have 2 in my race/street car and one of the is the primary power supply from the baterry and starter feeds from this block as well it gets the alternator charger and its been handeling excelent

10Pcs 360V 10A Dual Row Screw Terminals Electric Barrier 12-Position Terminal Strip Block Wire Connector Block

Yosoo

Based on 84 reviews Check latest price

Product description

These screw terminal blocks work excellent. They allow you to connect multiple items without having to solder or splice. There will be much less permanent connection that can easily be changed when needed. They can be used in motors, electrical control, power, household appliances, lighting, machinery and other electric wire connecting.



Material: Copper, PE

Color: White

Suitable Wire: 10m㎡ wire

Voltage: 360V

Current: 10A

Quantity:10pcs

Weight:155g



Package Include:

10pcs x Terminal Blocks

  • 【Fit for】Used for wires connecting of home appliances, electronic circuits, machines, etc.
  • 【Preventing Circuits】Each pair of terminals is insulated from the next, preventing circuits from disorder.
  • 【Easy to Use】Screw terminal block can be cut to small part as you need using scissors, knife or other tools.
  • 【Safe】The set screws secure wires reliable contact and help prevent accidental contact with the terminals.
  • 【Premium Material】Metal screw connectors are made from high quality copper and outer is made from PE.

User questions & answers

Question: What wire sizes can these reasonably handle 24g, 22g, 18g, 16g, 14g, 12g
Answer: 22-12g. 24g might be a little too small

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