Machine Switches | McMaster-Carr

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System of Measurement

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Dual Switch Roller Lever

Input Voltage

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High-Pressure Washdown

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C-TUV Rheinland Certified

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C-UL Recognized Component

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Export Control Classification Number (ECCN)

EAR99

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Compliant with Exemptions

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DFARS Specialty Metals

REACH

Illumination

Push-Button Style

Number of Positions

4,970 Products

Electrical

Manual Switches

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

1,266 products

Manual Switch Contact Blocks

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

40 products

Disconnect Switches

Make sure equipment stays turned off during inspection and maintenance

215 products

Motor Switches

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

45 products

Timer Switches

Automatically turn electrical equipment on or off after a set interval

99 products

Relays

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

718 products

Snap-Acting Switches

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

213 products

Motor Starters

Turn motors on and off and protect them from current overloads

435 products

Limit Switches

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

149 products

Motor Starter Overload Protectors

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

8 products

Potentiometers

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

26 products

Switch Guards

Prevent people from activating switches accidentally

2 products

Sensor Switches

Detect moving objects from a distance, triggering a circuit to open or close

1 product

Bumper Switches

Signal when overhead doors close or items reach the end of conveyors

23 products

Tablet Holders

Equip tablets with safety switches to halt robots, conveyors, and other machinery in an instant

3 products

Magnetic Switches

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

2 products

Motor Voltage Monitors

Protect electric motors by cutting power when faults occur

5 products

Switch Padding

Trigger an emergency stop when robot arms contact a worker or object

4 products

Transistors

Boost weak electrical signals and rapidly control data transmission

20 products

IO Link Programmers

Configure your IO Link devices without a PC, outlet, or separate software

1 product

Circuit Breakers

Reusable way to interrupt circuits when they overload or short

442 products

Outlet Boxes

House electrical components such as on-off switches, receptacles, and dimmer knobs

8 products

Electrical Receptacles

Install in a wall or panel to transmit power or data to plugs or sockets

70 products

Measuring and Inspecting

Decade Boxes

Test and troubleshoot circuits without needing to solder capacitors or replace resistors

3 products

Building and Machinery Hardware

Indicating Knobs

Control devices and view settings at a glance

89 products

Fluid Handling

Float Switches

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

122 products

Pressure Switches

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

300 products

Float Switch Relays

Amplify current to actuate equipment that has a higher current rating than your float switch

2 products

Vacuum Switches

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

26 products

Level Sensor Switches

Activate equipment by detecting the liquid level in a tank

25 products

Flow Switches

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

171 products

Pressure and Vacuum Switches

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

6 products

Heating, Ventilation, and Air Conditioning

HVAC Switches

Control and monitor airflow in HVAC systems automatically

3 products

Communication

RFID Readers

Read RFID cards when prototyping systems or scan RFID tags to control circuits

2 products