4 Terminal Switches | McMaster-Carr

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Electrical

Manual Switches

Manual Switches

Everything from toggle, push-button, and rocker switches to foot switches

Manual Switch Contact Blocks

Manual Switch Contact Blocks

Mount to switches to control electrical circuits as you move the switch

Limit Switches

Turn equipment on or off when objects touch the actuator; often used for conveyors and bin filling

Light Switches

Manually turn lights on and off

Light Dimmers

Adjust the brightness of lights, even in large workspaces

Relays

Electrically open and close circuits to control power to lights, motors, and other equipment

Disconnect Switches

Disconnect Switches

Make sure equipment stays turned off during inspection and maintenance

Safety Switches

Safety Switches

Protect people by cutting power to machines when access doors open; also known as interlock switches

Timer Switches

Automatically turn electrical equipment on or off after a set interval

Snap-Acting Switches

Snap-Acting Switches

Open and close circuits quickly to minimize arcing and sticking; often used as door-open indicators

Timer Relays

Turn machinery on or off after receiving an electrical signal that starts the timer

Fluid Handling

Pressure Switches

Pressure Switches

Activate controls, set off alarms, and power equipment when a set pressure is reached

Measuring and Inspecting

Signal Output Testers

Signal Output Testers

Check if the signal output of a DC switch is NPN or PNP to know how to wire components

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)