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. 804-6209
BrandRS PRO
MYR6.45
Each
units
Push Button 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. 804-6237
BrandRS PRO
MYR6.70
Each
units
Short 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. 804-6234
BrandRS PRO
MYR4.67
Each
units
Push Button 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. 804-6278
BrandRS PRO
MYR2.982
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. 804-6262
BrandRS PRO
MYR4.058
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. 804-6199
BrandRS PRO
MYR33.20
Each
units
Spring Lever Screw 15 A @ 250 V ac SP - 170 gms - - - Silver - 1000000Operations 21gf -
RS Stock No. 797-2536
BrandRS PRO
MYR44.61
Each
units
Spring Plunger Screw 15 A @ 250 V ac SP-CO - 420 gms - - - Fine Silver Plastic 1000000Operations 170gf -
RS Stock No. 797-2514
BrandRS PRO
MYR25.09
Each
units
Roller Lever Screw 15 A @ 250 V ac SP-CO - 213 gms - - - Fine Silver Plastic 1000000Operations 35gf -
RS Stock No. 175-9414
BrandRS PRO
MYR27.36
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 175-9564
BrandRS PRO
MYR27.36
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 797-2527
BrandRS PRO
MYR32.85
Each
units
Pin Plunger Screw 15 A @ 250 V ac SP-CO - 428 gms - - - Fine Silver Plastic 1000000Operations 173gf -
RS Stock No. 175-8692
BrandRS PRO
MYR25.644
Each (In a Tray of 20)
units
- - - - - - - - - - - - - -
RS Stock No. 175-8631
BrandRS PRO
MYR22.647
Each (In a Tray of 20)
units
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. 175-8762
BrandRS PRO
MYR27.137
Each (In a Tray of 20)
units
- - - - - - - - - - - - - -
RS Stock No. 175-8768
BrandRS PRO
MYR22.647
Each (In a Tray of 20)
units
- - - - - - - - - - - - - -
RS Stock No. 797-2533
BrandRS PRO
MYR76.74
Each
units
Spring Plunger Screw 15 A @ 250 V ac SP-CO - 422 gms - - - Fine Silver Plastic 1000000Operations 170gf -
RS Stock No. 804-6215
BrandRS PRO
MYR8.02
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. 175-8701
BrandRS PRO
MYR22.647
Each (In a Tray of 20)
units
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. 175-9578
BrandRS PRO
MYR24.17
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 804-6247
BrandRS PRO
MYR16.13
Each
units
Button Quick Connect 16 A @ 250 V ac DP - 800 gms - +85°C - Silver - - 160gf Maximum of +85°C
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