Barrier Strips | McMaster-Carr

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899 Products

Terminal Blocks

Dividers separate live wires and keep your setup tidy

222 products

Touch-Safe Terminal Blocks

Recessed terminals protect you from shocks and prevent short circuits

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Space-Saving Terminal Blocks

Connect the same number of circuits as standard terminal blocks in a narrower footprint

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Terminal Blocks for Thermocouples

Connect thermocouple wire without distorting or destroying the signal

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Enclosure-Mounted Terminal Blocks

Ready to install without mounting the terminal block first

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Circuit Board Terminal Blocks

Pins on the bottom align with circuit board layouts

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Enclosure-Mounted Quick-Connect Terminal Blocks

Release a spring instead of fussing with a screw to attach your wire

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Touch-Safe Plug-and-Socket Terminal Blocks

Cut power with the pull of a plug while preventing shocks and short circuits

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Through-Panel Terminal Blocks

Mount in a panel cutout to connect components on opposite sides

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Quick-Connect Terminal Blocks

Snap wire into place with a clamp instead of fussing with a screw

9 products

Space-Saving Circuit Board Terminal Blocks

Handle as much voltage as other circuit board blocks while taking up half the space

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Space-Saving Modular DIN-Rail Mount Terminal Blocks

Snap onto low-profile DIN 2 rail to save space in compact enclosures

37 products

Plug-and-Socket Circuit Board Terminal Blocks

Cut power and swap out components on your circuit board without removing any wire

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Through-Panel Quick-Connect Terminal Blocks

Snap wire in by hand to connect components on opposite sides of a panel

1 product

Modular DIN-Rail Mount Terminal Blocks

Mix and match blocks to get the exact number of circuits you need

90 products

High-Temperature Terminal Blocks

The ceramic body handles temperatures up to 1,200° F

13 products

Quick-Connect Modular DIN-Rail Mount Terminal Blocks

Snap wire into place with a clamp instead of fussing with a screw

146 products

Clear-View Enclosure-Mounted Terminal Blocks

Check circuits through the clear cover while blocking out dirt and liquids

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Quick-Connect Plug-and-Socket Modular DIN-Rail Mount Terminal Blocks

Pull the plug to cut power and swap out equipment

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Terminal Blocks for RTD and Thermocouple Connection Heads

Connect thermocouple and RTD probes to wire and instrumentation

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Terminal Blocks for Motors

Rotate jumpers to match wye, delta, and other wiring layouts on motors

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Route electricity within switchboards and battery banks; also known as bus bars

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Distribution Blocks

Distribute electricity from a single power source to several devices in a circuit

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Wire Splices, Connectors, and Taps

Join wire and protect the connection

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DIN Rail Stops

Keep components such as terminal locks and relays from shifting on rails

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DIN Rail Spacers

Slide along rails to separate and organize terminal blocks, relays, and other components

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Wire Splice Covers

Seal out dust and moisture to protect electrical connectors

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