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. 333-300
BrandRS PRO
HK$304.14
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. 804-6221
BrandRS PRO
HK$34.03
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 80gf -55 → +85 (Environmental)°C
RS Stock No. 804-6259
BrandRS PRO
HK$33.52
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. 804-6234
BrandRS PRO
HK$22.08
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. 804-6199
BrandRS PRO
HK$59.85
Each
units
Spring Lever Screw 15 A @ 250 V ac SP - 170 gms - - - Silver - 1000000Operations 21gf -
RS Stock No. 804-6253
BrandRS PRO
HK$4.086
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. 333-316
BrandRS PRO
HK$201.93
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. 175-9627
BrandRS PRO
HK$40.19
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 175-9570
BrandRS PRO
HK$40.19
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 175-9616
BrandRS PRO
HK$40.19
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. 175-8781
BrandRS PRO
HK$42.601
Each (In a Tray of 20)
units
- - - - - - - - - - - - - -
RS Stock No. 175-8697
BrandRS PRO
HK$48.683
Each (In a Tray of 20)
units
- - - - - - - - - - - - - -
RS Stock No. 175-8758
BrandRS PRO
HK$45.088
Each (In a Tray of 20)
units
- - - - - - - - - - - - - -
RS Stock No. 175-9450
BrandRS PRO
HK$45.38
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 175-9444
BrandRS PRO
HK$48.04
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 175-9625
BrandRS PRO
HK$40.19
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 804-6209
BrandRS PRO
HK$27.41
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. 797-2558
BrandRS PRO
HK$98.85
Each
units
Long Roller Lever Solder 5 A @ 250 V ac SP-CO IP67 200 gms -10°C +85°C - Silver Glass Fibre Reinforced Nylon 1000000Operations 40gf -10 → +85°C
RS Stock No. 175-9399
BrandRS PRO
HK$45.38
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -
RS Stock No. 175-9432
BrandRS PRO
HK$48.04
1 Pack of 1
Pack(s)
- - - - - - - - - - - - - -