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.

...
Read more Read less

Filters

Viewing 1 - 20 of 2028 products
Results per page
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. 804-6262
BrandRS PRO
£0.772
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. 797-2494
BrandRS PRO
£25.15
Each
Units
Plunger Screw 15 A @ 250 V ac SP-CO IP40 283 gms - - - Fine Silver Metal 1000000Operations 113gf -
RS Stock No. 333-322
BrandRS PRO
£19.46
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. 797-2508
BrandRS PRO
£27.89
Each
Units
Plunger Pre-wired 15 A @ 250 V ac SP-NO/NC IP54 723 gms - - - Fine Silver Metal 1000000Operations 170gf -
RS Stock No. 797-2501
BrandRS PRO
£21.51
Each
Units
Plunger Screw 15 A @ 250 V ac SP-CO IP54 723 gms - - - Fine Silver Metal 1000000Operations 170gf -
RS Stock No. 804-6265
BrandRS PRO
£0.618
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
£0.654
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. 333-300
BrandRS PRO
£22.05
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. 797-2498
BrandRS PRO
£26.85
Each
Units
Roller Lever Screw 15 A @ 250 V ac SP-CO IP54 300 gms - - - Fine Silver Metal 1000000Operations 150gf -
RS Stock No. 804-6253
BrandRS PRO
£0.308
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. 804-6271
BrandRS PRO
£0.53
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. 804-6209
BrandRS PRO
£2.65
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. 804-6219
BrandRS PRO
£2.98
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. 804-6234
BrandRS PRO
£1.93
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. 797-2549
BrandRS PRO
£6.74
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. 804-6231
BrandRS PRO
£5.22
Each
Units
Plunger Quick Connect 6 A @ 400 V ac SPDT-NO/NC IP40 600 gms -20°C +85°C V0 Housing Silver - 1 x 10⁶Operations - -20 → +85°C
RS Stock No. 333-316
BrandRS PRO
£14.64
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. 797-2523
BrandRS PRO
£5.97
Each
Units
Plunger Screw 15 A @ 250 V ac SP-CO - 428 gms - - - Fine Silver Plastic 1000000Operations 173gf -
RS Stock No. 804-6212
BrandRS PRO
£2.65
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. 797-2555
BrandRS PRO
£6.23
Each
Units
Lever Solder 10 A @ 250 V ac DP - 100 gms -65°C +125°C - Silver - 1000000Operations 15gf -65 → +125°C
Related Products
The Alps SSCTL series of micro detector switches ...
Description:
The Alps SSCTL series of micro detector switches offer a lever-actuated switch solution for space-critical applications. The SSCTL series is available with both PCB termination or flying leads to ensure your application is covered. Features and Benefits10,000 cycle mean time before failure (MTBF).PCB or lead wiring options available.Suitable for use ...
Has two separate simultaneously switching SPDT actions in ...
Description:
Has two separate simultaneously switching SPDT actions in the same housing giving a DPDT switchThe two sets of terminals are separated by a barrier stripConnection is by means of screws and cup washersContact rating; 10A @ 250Vac, 150mA @ 250Vdc.
Available in sealed (IP65) or standard (IP50) versionsInternal ...
Description:
Available in sealed (IP65) or standard (IP50) versionsInternal earthing pointAvailable with standard plunger button, a roller lever actuator or wobble stick lever (IP65) Roller lever actuator is mounted on a hardened steel bracket allowing horizontal adjustment through 360° and vertical adjustment through 225°Actuator contact parts made of hardened steelOperating temperature ...
Available with a wide variety of actuatorsUltra small ...
Description:
Available with a wide variety of actuatorsUltra small movement differentialFitted with large brass screw terminalsMechanical life of up to 1 million cyclesCase & cover material: PhenolicLow operating forcesActuator material: StainlessMetric mounting holes.