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. 804-6237
BrandRS PRO
SGD3.28
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. 797-2573
BrandRS PRO
SGD12.24
Each
units
Roller Lever Screw 15 A @ 250 V ac SP-CO - 131 gms - - - Fine Silver Plastic 1000000Operations 21gf -
RS Stock No. 797-2511
BrandRS PRO
SGD17.37
Each
units
Lever Screw 15 A @ 250 V ac SP-CO - 85 gms - - - Fine Silver Plastic 1000000Operations 14gf -
RS Stock No. 797-2536
BrandRS PRO
SGD19.18
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
SGD10.47
Each
units
Roller Lever Screw 15 A @ 250 V ac SP-CO - 213 gms - - - Fine Silver Plastic 1000000Operations 35gf -
RS Stock No. 797-2570
BrandRS PRO
SGD16.49
Each
units
Lever Screw 15 A @ 250 V ac SP-CO - 85 gms - - - Fine Silver Plastic 1000000Operations 14gf -
RS Stock No. 804-6228
BrandRS PRO
SGD5.00
Each
units
Short 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. 797-2501
BrandRS PRO
SGD31.54
Each
units
Plunger Screw 15 A @ 250 V ac SP-CO IP54 723 gms - - - Fine Silver Metal 1000000Operations 170gf -
RS Stock No. 804-6219
BrandRS PRO
SGD4.61
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. 797-2549
BrandRS PRO
SGD28.70
Each
units
Short Roller Lever Cable 5 A @ 250 V ac SP-CO IP67 390 gms -10°C +85°C - Silver Glass Fibre Reinforced Nylon 1000000Operations 110gf -10 → +85°C
RS Stock No. 797-2523
BrandRS PRO
SGD14.30
Each
units
Plunger Screw 15 A @ 250 V ac SP-CO - 428 gms - - - Fine Silver Plastic 1000000Operations 173gf -
RS Stock No. 804-6209
BrandRS PRO
SGD4.85
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. 804-6259
BrandRS PRO
SGD6.38
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. 804-6215
BrandRS PRO
SGD3.88
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. 804-6196
BrandRS PRO
SGD3.88
Each
units
Long Straight Lever Solder 16 A @ 250 V ac SPDT - 250 gms -55 (Environmental)°C +85°C V3 Housing Silver on Copper Glass Filled Thermoplastic 10000000Operations 25gf -55 → +85 (Environmental)°C
RS Stock No. 797-2558
BrandRS PRO
SGD33.29
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. 797-2567
BrandRS PRO
SGD7.25
Each
units
Cap Quick Connect 16 A @ 250 V ac DP-CO - 800 gms - +85°C - Silver - - 160gf Maximum of +85°C
RS Stock No. 804-6206
BrandRS PRO
SGD5.19
Each
units
Long Roller Lever Solder 16 A @ 250 V ac SPDT - 250 gms -55 (Environmental)°C +85°C V3 Housing Silver on Copper Glass Filled Thermoplastic 10000000Operations 25gf -55 → +85 (Environmental)°C
RS Stock No. 804-6203
BrandRS PRO
SGD3.88
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. 804-6225
BrandRS PRO
SGD3.95
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
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