Electrical Switches | McMaster-Carr

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7,032 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

Light Switches

Manually turn lights on and off

58 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

Snap-Acting Switches

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

214 products

Limit Switches

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

149 products

Light Dimmers

Adjust the brightness of lights, even in large workspaces

18 products

Relays

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

719 products

Switch Guards

Prevent people from activating switches accidentally

2 products

Timer Switches

Automatically turn electrical equipment on or off after a set interval

99 products

Safety Switches

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

39 products

Transfer Switches

Switch to backup power during an outage

5 products

Programmable Logic Controllers

Program complex automation jobs by combining the functionality of a relay, timer relay, and switch

9 products

Potentiometers

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

26 products

Programmable Logic Controller Expansion Modules

Increase the number of inputs and outputs for your PLC

12 products

Sensor Switches

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

682 products

Photoelectric Switch Reflectors

Pair with sensor switches to reflect light back at them

38 products

IO Link Programmers

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

1 product

Bumper Switches

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

23 products

Control Panels

Connect and monitor your fire alarm system

1 product

Fusible Link Switches

Use as a safety switch to shut off hydraulic equipment and other machinery when the link melts

5 products

Motor Starters

Turn motors on and off and protect them from current overloads

414 products

Timer Relays

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

198 products

Motor Starter Overload Protectors

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

8 products

Transistors

Boost weak electrical signals and rapidly control data transmission

20 products

Speed-Monitoring Switches

Avoid downtime and machinery damage by detecting slowdowns in drive trains and conveyors

1 product

Switch Mounts

Mount sensor switches to panel cutouts, tank walls, or conveyors

5 products

Light Curtains

Immediately cut power to machinery when anything blocks the light beam

11 products

Tilt Switches

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

8 products

Magnetic Switches

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

88 products

Motor Voltage Monitors

Protect electric motors by cutting power when faults occur

4 products

Motor Speed Controls

Manage the speed of AC and DC motors

34 products

Light Switch Sensors

Automatically turn lights on and off when you enter and exit rooms

75 products

Ethernet Switches

Expand your data network by connecting computers, printers, and servers

60 products

Tablet Holders

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

3 products

Switch Padding

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

4 products

Sensor Switch Transmitters

Monitor objects, switch equipment on and off, and send data to control systems with a single device

16 products

IO Link Controllers

Communicate between your sensors, actuators, and PLC

10 products

Light Switch/Receptacles

Combine a switch and receptacle into a single outlet box for a small footprint

2 products

Circuit Breakers

Reusable way to interrupt circuits when they overload or short

449 products

Electrical Cords

Connect equipment and devices to a power supply

9 products

Electrical Receptacles

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

70 products

Outlet Boxes

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

8 products

Safety Equipment

Smoke Detector Test Stations

Test hard-to-reach HVAC smoke detectors from a convenient location

1 product

Smoke Detectors

Warn people when there's smoke in your facility

7 products

Fire Alarm Pull Stations

Activate to send a signal to your control panel if there's a fire

3 products

Building and Machinery Hardware

Indicating Knobs

Control devices and view settings at a glance

89 products

Brackets

Connect surfaces in an assembly

64 products

Cam Latches

Secure drawers, cabinets, mailboxes, and other enclosures

18 products

Measuring and Inspecting

Thermometer Cooling Jackets

Connect to a compressed air or water line to keep infrared thermometer transmitters from overheating

1 product

Thermometer Air Purges

Blow dust and moisture off infrared thermometer transmitter lenses

1 product

Thermometer Insulating Tubes

Prevent infrared thermometer transmitters from overheating by shielding them from hot surfaces

1 product

Thermometer Covers

Prevent dirt buildup on infrared thermometer transmitters

1 product

Signal Output Testers

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

1 product

Decade Boxes

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

3 products

Lighting

Light Socket Pull Cords

Lengthen pull-chain light switches

1 product

Light Sockets

Install or replace sockets in fixtures for standard household, tubular, compact, or miniature bulbs

3 products

Fluid Handling

On-Off Valves

Start and stop flow through a line

600 products

Directional Control Valves

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

197 products

Flow Switches

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

4 products

Level Sensor Switches

Activate equipment by detecting the liquid level in a tank

25 products

Noncontact Temperature Sensors

Monitor the temperature of hazardous, sensitive, and hard-to-reach materials without touching them

5 products

Communication

Speaker Volume Controls

Wire between your speakers and sound amplifier to adjust the volume

4 products

RFID Reader/Writers

Scan RFID tags and cards to track inventory or grant building access

2 products

Audible Alarms

Everything from bells and whistles to horns and sirens

5 products

Fabricating and Machining

Abrasive Blaster Safety Switches

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

6 products

Heating, Ventilation, and Air Conditioning

HVAC Flame Detectors

Replace flame detectors in HVAC equipment such as furnaces, ovens, water heaters, and boilers

1 product

Material Handling

Conveyor Accessory Mounts

Position guides or sensors to the exact spot needed for your conveyor

48 products