RS PRO Roller Lever Subminiature Micro Switch, Solder Terminal, 4 A @ 28 V dc, SP-CO

The precision snaps action for on/off applications is a synonym of Microswitch.

Today, we are proudly introducing our own branded RS PRO Miniature Micro Switch where current mechanical energy applied to an actuator provides a high-precision electrical output. The actuator type comes as a basic switch with unfitted actuator kit and fining hardware, offering you an impressive temperature operating range of -54°C up to +121°C allowing you full application flexibility.

Microswitch fits perfectly with:

• Appliances


• Computer/business equipment


• Communication equipment


• HVAC (Heating, Ventilation, and Air Conditioning)


• Manually operated devices


• Medical, Dental equipment


• Office equipment


• Test instruments and timing devices


• Valves and vending machines


• Door interlocks


• Microwave ovens


• Elevators

What are microswitches?

Microswitches are mechanically operated electrical switches designed with an actuator and terminals called common, normally open and normally closed. A microswitch is also known as a snap action switch; they operate by using a spring-loaded lever to open and close a set of internal contacts inside the unit.

How does a microswitch work?

Power is typically attached to the common terminal; this leads into the Switch and energises the spring and because the spring is touching the normally close pin it sends power out here, this is called a resting state. Once the arm is moved, the power is then transferred to the normally open pin.

RS PRO is our family brand to go-to and brings you a wide range for high-quality and high-value products to support your project. Trusted by engineers all over the world, every part of every RS PRO product is always rigorously tested against demanding industry standards. We are only giving the RS PRO seal of approval if we are confident of their exceptional quality, which means you can be convinced too.

UL; CSA