Interlock Door Switches | McMaster-Carr

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186 Products

Choosing an Electrical Switch

Frame-Mounted Safety Switches

Often used with machine guards, these switches mount to a door frame.

Hinge-Actuated Safety Switches

Replace access door hinges with these switches; they actuate when the door opens at least 4°.

Access-Delay Frame-Mounted Safety Switches

Delay access to hazardous areas until conditions are safe; use these switches with machines that take time to stop after they are turned off. They mount to a door frame.

Magnetically Actuated Switches

These switches actuate when a magnet comes within sensing distance, and reset when the magnet moves away.

Magnetic Contact Alarm Switches

Wire contacts to an alarm system to alert when doors or windows are opened.

Tamper-Resistant Magnetically Actuated Switches

Prevent unauthorized use—these switches require coded magnets to actuate. They cannot be bypassed using ordinary magnets.

Circuit Board Magnetically Actuated Switches

Mounted to your circuit board, these switches trigger when magnetic components get near, and reset as they move away.

Enclosure Door Switches

Activate or deactivate fans, lights, and other devices inside your enclosure when you open or close the door.

Enclosure Disconnect Switches

Mount these switches inside your enclosure to prevent it from opening when power is on—actuating the switch disconnects power and releases the door.

Durable Disconnect Switches

Protected by a steel enclosure, these switches withstand tougher conditions than switches in a plastic housing. Also known as safety switches, they have quick-make/quick-break action to eliminate arcing and prolong switch life.

Outdoor Durable Disconnect Switches

A raintight NEMA 3R rated enclosure protects these switches outdoors.

Vibration-Resistant Grab Latches with Electrical Switch

Vibration-Resistant Grab
Latches with Electrical Switch

An electrical switch allows these latches to power a light or other signal to indicate whether a door is open or closed.