Contactor Switches | McMaster-Carr

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Switch Type

3,227 Products

Most Likely Products

Motor Starters

Turn motors on and off and protect them from current overloads

451 products

Lever Switches

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

60 products

Motor Switches

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

45 products

Push-Button Switches

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

272 products

Safety Switches

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

59 products

Relays

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

366 products

Safety Relays

Monitor circuits and force machines to a safe stop if the relay detects a fault

60 products

All Results

Electrical Power, Networking, and Controlling

Lever Switches

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

60 products

Motor Switches

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

45 products

Push-Button Switches

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

272 products

Safety Switches

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

59 products

Limit Switches

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

153 products

Switch Mats

Step on a mat to actuate circuits, often to control doors, lights, and alarms

35 products

Snap-Acting Switches

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

206 products

Magnetic Switches

Actuate when a magnet comes within sensing distance; often used to detect when doors or windows open

120 products

Touch-Pad Switches

Lay flat or mount on a wall to alert you when doors open or objects are removed

2 products

Ribbon Switches

Place across driveways or walkways to actuate when foot and vehicle traffic pass over

15 products

Enabling Switches

Equipment only runs while you press the switch; also known as deadman switches

10 products

Toggle Switches

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

43 products

Rocker Switches

Press the wide, flat surface to easily turn circuits on and off

13 products

Foot Switches

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

80 products

Emergency Stop Switches

Cut power to equipment during emergencies

4 products

Pendant Switches

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

81 products

Pull Switches

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

2 products

Doorbell Switches

Activate doorbells or buzzers with the push of a button

22 products

Finger-Touch Switches

Lightly touch with your finger to turn circuits on and off

22 products

Joystick Switches

Move the joystick to steer and position cranes, robot arms, and other machinery

6 products

Key Switches

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

22 products

Air-Actuated Switches

Press with your hand or foot to turn circuits on and off with air pressure

3 products

Fingerprint Scanners

Use fingerprints to confirm the identity of personnel before granting access to areas or equipment

2 products

Enclosure Door Switches

Control fans, lights, and other devices inside your enclosure when you open and close the door

2 products

Proximity Sensors

Detect the presence or position of objects from a short sensing distance

394 products

Cylinder Position Sensors

Monitor your air cylinder rod's position and turn the cylinder on and off

8 products

Motor Starters

Turn motors on and off and protect them from current overloads

451 products

Motor Starter Overload Protectors

Upgrade your motor starter protector to use less energy and emit less heat

8 products

Relays

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

366 products

Safety Relays

Monitor circuits and force machines to a safe stop if the relay detects a fault

60 products

Infrequent-Cycle Relays

Use with equipment that cycles on and off, such as HVAC systems

147 products

Latching Relays

Lock into position so they don't require constant voltage to stay switched

27 products

Air-Actuated Relays

Convert an air signal on a pneumatic control system to an electric one

1 product

Transistors

Boost weak electrical signals and rapidly control data transmission

20 products

Interface Relays

Isolate input and output circuits to protect PLCs and other controllers

48 products

Lighting Relays

Control lighting circuits and switch lighting systems on or off

13 products

Vehicle Relays

Switch high-current loads on vehicles, such as starters, headlights, and fuel pumps

36 products

Monitoring Relays

Trip circuits or sound an alarm when voltage, current, or other limits are exceeded

31 products

Alternating Relays

Automatically split run time between two devices so one isn't always running

1 product

Proportional-Control Relays

Gradually adjust output instead of turning on or off

12 products

Measuring and Inspecting

Rotary Switches

Control multiple devices with a single switch

6 products

Fabricating and Machining

Abrasive Blaster Safety Switches

Shut off abrasive blasters if the operator loses control; also known as deadman switches

11 products

Building and Machinery Hardware

Cam Latches

Secure drawers, cabinets, mailboxes, and other enclosures

18 products