Microswitches

Microswitches are mechanically operated electrical switches designed with an actuator and terminals called common, normally open and normally closed. A micro switch 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.

Where would you find them?

Microswitches are differentiated by their electrical characteristics. These are small devices and generally only designed to carry low current and voltages. These switches are very commonly employed as safety devices, as they are reliable, inexpensive and can open up a circuit when needed, preventing a machine from being turned on or a door from closing when someone is in the way.

Actuator types

There are various types available but the operating principles are the same, switches are actuated by a plunger, a button, a roller or a lever.

What is their operating life?

Microswitches operating life is generally very high, being measured in millions of cycles, in most cases. Consumer products generally have lighter-duty microswitches than industrial products, but the low cost of these parts makes it easy enough to upgrade to higher mechanical life expectancies when required or when it's simply beneficial to do so.

Standards

We offer a range of high quality sealed miniature and sub-miniature microswitches that meet industry standards and RoHS compliance.

What type of applications need microswitches?

Microswitches are used in consumer devices and industrial equipment. Common application for these devices are in door interlocks, microwave ovens or where a door has to be shut before the power to the device will turn on. Microswitches are also used in levelling devices, such as those used on vending machines. In an elevator, these devices are used in the door as a safety switch.

Microswitches can be designed to be very sensitive. Such designs can be used in very precise equipment, such as that which measures the flow of air or other gasses through a system. These devices are used extensively in industry, often in control circuits.

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Description Price Actuator Type Terminal Type Contact Current Rating Contact Configuration IP Rating Operating Force Minimum Operating Temperature Maximum Operating Temperature Switch Housing Contact Material Case Material Mechanical Life Release Force Operating Temperature Range
RS Stock No. 804-6271
BrandRS PRO
SGD0.994
Each (In a Bag of 5)
units
Roller Lever Solder 2 A @ 250 V ac SP - 50 gms -25°C +85°C - Silver Glass Filled Thermoplastic 500000 Operations @ 60 cpm 2.5gf -25 → +85°C
RS Stock No. 333-322
BrandRS PRO
SGD30.34
Each
units
Roller Lever Solder 4 A @ 28 V dc SPDT - 1.952 N -54°C +121°C - Silver Plated - 10⁷Operations 0.988N -54 → +121°C
RS Stock No. 804-6262
BrandRS PRO
SGD1.162
Each (In a Bag of 5)
units
Lever Solder 2 A @ 250 V ac SP - 50 gms -25°C +85°C - Silver Glass Filled Thermoplastic 500000 Operations @ 60 cpm 2.5gf -25 → +85°C
RS Stock No. 804-6253
BrandRS PRO
SGD0.70
Each (In a Bag of 5)
units
Plunger Solder 2 A @ 250 V ac SP - 100 gms -25°C +85°C - Silver Glass Filled Thermoplastic 500000 Operations @ 60 cpm 15gf -25 → +85°C
RS Stock No. 804-6265
BrandRS PRO
SGD0.984
Each (In a Bag of 5)
units
Roller Lever Solder 2 A @ 250 V ac SP - 50 gms -25°C +85°C - Silver Glass Filled Thermoplastic 500000 Operations @ 60 cpm 2.5gf -25 → +85°C
RS Stock No. 804-6278
BrandRS PRO
SGD0.858
Each (In a Bag of 5)
units
Lever Solder 2 A @ 250 V ac SP - 50 gms -25°C +85°C - Silver Glass Filled Thermoplastic 500000 Operations @ 60 cpm 2.5gf -25 → +85°C
RS Stock No. 804-6186
BrandRS PRO
SGD81.62
Each
units
Lever Screw 15 A @ 250 V ac SP - 510 gms - - Heavy Duty Zinc Alloy Silver - 1000000Operations 113gf -
RS Stock No. 333-300
BrandRS PRO
SGD34.25
Each
units
Leaf Lever Solder 4 A @ 28 V dc SPDT - 1.667 N -54°C +121°C - Silver Plated - 10⁷Operations 0.988N -54 → +121°C
RS Stock No. 333-316
BrandRS PRO
SGD23.66
Each
units
Lever Solder 4 A @ 28 V dc SPDT - 0.275 N -54°C +121°C - Silver Plated - 10⁷Operations 0.141N -54 → +121°C
RS Stock No. 804-6256
BrandRS PRO
SGD3.60
Each
units
Long Straight Lever Quick Connect 16 A @ 250 V ac SPDT - 400 gms -55 (Environmental)°C +85°C V3 Housing Silver on Copper Glass Filled Thermoplastic 10000000Operations 12gf -55 → +85 (Environmental)°C
RS Stock No. 175-9399
BrandRS PRO
SGD8.50
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 804-6259
BrandRS PRO
SGD2.98
Each
units
Long Roller Lever Quick Connect 16 A @ 250 V ac SPDT - 400 gms -55 (Environmental)°C +85°C V3 Housing Silver on Copper Glass Filled Thermoplastic 10000000Operations 25gf -55 → +85 (Environmental)°C
RS Stock No. 175-9395
BrandRS PRO
SGD8.99
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 797-2494
BrandRS PRO
SGD35.92
Each
units
Plunger Screw 15 A @ 250 V ac SP-CO IP40 283 gms - - - Fine Silver Metal 1000000Operations 113gf -
RS Stock No. 175-9590
BrandRS PRO
SGD7.53
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 175-9441
BrandRS PRO
SGD7.53
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 175-9425
BrandRS PRO
SGD9.49
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 175-9623
BrandRS PRO
SGD7.53
1 Pack of 1
Pack(s)
Push Button PCB 125 mA @ 125 V ac, 200 mA @ 50 V dc, 400 mA @ 32 V ac Single Pole Single Throw (SPST) IP68 3 → 6 N -30°C +85°C - - - - - -30 → +85°C
RS Stock No. 804-6215
BrandRS PRO
SGD2.41
Each
units
Long Straight Lever Quick Connect 16 A @ 250 V ac SPDT - 400 gms -55 (Environmental)°C +85°C V3 Housing Silver on Copper Glass Filled Thermoplastic 10000000Operations 80gf -55 → +85 (Environmental)°C
RS Stock No. 175-9417
BrandRS PRO
SGD8.50
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
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