SPST-NO Switches | McMaster-Carr

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Switch Designation

SPST-NO

System of Measurement

Switching Voltage

Switch Action

Actuator Style

Simulated Roller Lever

Number of Terminals

Panel Cutout Diameter

Illumination

Switching Current

Number of Positions

Wire Connection

Position Designation

Number of Circuits Controlled

Environment

High-Pressure Washdown

High-Temperature Washdown

Actuator Color

Push-Button Style

Color

Push-Button Shape

Electrical Connection

Flat-Pin Mini Thermocouple Connector

Switch Starting Position

Mounting Location

Printed Circuit Board

Export Control Classification Number (ECCN)

EAR99

RoHS

Compliant

Compliant with Exemptions

Not Compliant

DFARS Specialty Metals

Exempt

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

REACH

1,101 Products

Electrical Power, Networking, and Controlling

Toggle Switches

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

13 products

Push-Button Switches

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

155 products

Push-Button Switch Contact Blocks

Pair with an actuator to create a custom switch

12 products

Lever Switches

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

53 products

Rocker Switches

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

25 products

Switch Contact Blocks

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

13 products

Snap-Acting Switches

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

34 products

Doorbell Switches

Activate doorbells or buzzers with the push of a button

22 products

Magnetic Switches

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

57 products

Pendant Switches

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

73 products

Foot Switches

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

23 products

Key Switches

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

49 products

Switch Mats

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

45 products

Tilt Switches

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

6 products

DIP Switches

Slide actuators to open or close each circuit to configure instructions for electronic devices

7 products

Limit Switches

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

2 products

Touch-Pad Switches

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

4 products

Bumper Switches

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

31 products

Air-Actuated Switches

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

4 products

Ribbon Switches

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

13 products

Emergency Stop Switches

Cut power to equipment during emergencies

11 products

Timer Switches

Automatically turn electrical equipment on or off after a set interval

2 products

Relays

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

105 products

Proportional-Control Relays

Gradually adjust output instead of turning on or off

8 products

Interface Relays

Isolate input and output circuits to protect PLCs and other controllers

19 products

Latching Relays

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

5 products

Timer Relays

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

55 products

Vehicle Relays

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

22 products

Infrequent-Cycle Relays

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

9 products

Potentiometers

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

1 product

Power Receptacles

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

11 products

Fluid Handling

Float Switches

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

85 products

Level Sensor Switches

Activate equipment by detecting the liquid level in a tank

6 products

Temperature Controllers

Precisely regulate process temperatures; more accurate than temperature switches

55 products

Temperature Switches

Turn heating equipment on or off at a specified temperature

44 products

Pressure Switches

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

8 products

Safety Equipment

Smoke Detector Test Stations

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

1 product

Lighting

Light Switches

Manually turn lights on and off

5 products

Building and Machinery Hardware

T-Slotted Framing Switches

Attach to your rail to actuate components or cut power

7 products

Fabricating and Machining

Abrasive Blaster Safety Switches

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

1 product