NEMA 4 Switches | McMaster-Carr

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Switch Action

Maintained

Momentary

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Illumination

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Actuator Base Material

Metal

Plastic

Export Control Classification Number (ECCN)

EAR99

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

Exempt

RoHS

Compliant

Compliant with Exemptions

REACH

666 Products

Electrical Power, Networking, and Controlling

Push-Button Switches

Our most common switch type actuates circuits with the push of a button

110 products

Lever Switches

Grip and twist the lever to turn circuits on and off, preventing accidental actuation

28 products

Toggle Switches

Flip the toggle from one position to the other, turning circuits on and off

18 products

Limit Switches

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

37 products

Emergency Stop Switches

Cut power to equipment during emergencies

49 products

Snap-Acting Switches

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

9 products

Tilt Switches

Trip circuits when tilted; use as position indicators, pump level controls, and limit switches

8 products

Foot Switches

Step on the pedal to actuate circuits while keeping your hands free for other tasks

15 products

Pull Switches

Tug on a cable or rope to turn on and off circuits, often for production lines along conveyors

2 products

Vibration Switches

Monitor vibration in machinery and shut it down or sound an alarm if levels rise

1 product

Key Switches

Turn a key to actuate circuits, preventing accidental start and limiting access

13 products

Pendant Switches

Control machinery, such as cranes, hoists, and trolleys, from a safe distance

37 products

Motor Switches

Turn motors, lighting, and electric heat circuits on and off

2 products

Safety Switches

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

1 product

Potentiometers

Control speed, volume, and light intensity by varying electrical flow; also known as rheostats

2 products

Motor Speed Controls

Manage the speed of AC and DC motors

4 products

Console Enclosures

Build out interfaces with buttons, gauges, and other components to monitor and control machinery

9 products

Fluid Handling

Pressure Switches

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

92 products

Vacuum Switches

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

15 products

Differential Pressure Switches

Activate controls and alarms when the pressure difference between process lines exceeds a setpoint

2 products

Flow Switches

Turn equipment on or off when flow rate reaches a set point

16 products

Float Switches

Start process equipment such as pumps and motors when the liquid in your tank reaches the float

14 products

Directional Control Valves

Manage the flow of fluids to move equipment in air- and hydraulic-powered systems

20 products

Temperature Switches

Turn heating equipment on or off at a specified temperature

76 products

Heating, Ventilation, and Air Conditioning

Thermostats

Connect to heaters, fans, and air conditioners to control the temperature

1 product

Building and Machinery Hardware

Cam Latches

Secure drawers, cabinets, mailboxes, and other enclosures

18 products