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. 161-6713
Mfr. Part No.83161-3 IW3 F2
BrandCrouzet
$6.04
Each
units
Plunger Tab 20 A @ 250 V ac NO/NC IP40 0.8 N -20°C +125°C V3 Housing Silver Nickel Polyamide 2 x 10^7Operations 0.2N -20 → +125°C
RS Stock No. 161-7306
Mfr. Part No.83 123 0-2,2M
BrandCrouzet
$163.21
Each
units
Standard - 5 A @ 250 V ac Single Pole Double Throw (SPDT) IP66 7.5 N 0°C +85°C - Silver Nitrile 2 x 10^6Operations 1.5N 0 → +85°C
RS Stock No. 161-5574
Mfr. Part No.83139003
BrandCrouzet
$82.68
Each
units
- - 6 A @ 250 V ac DPST - - 0°C +85°C - - - - - 0 → +85°C
RS Stock No. 161-4981
Mfr. Part No.83137004
BrandCrouzet
$17.33
Each
units
Lever Tab 5 A @ 250 V ac SPDT-NO/NC - 0.12 N -20°C +125°C - Silver - 10000000Operations - -20 → +125°C
RS Stock No. 539-309
Mfr. Part No.83137004
BrandCrouzet
$20.24
Each
units
- - - - - - - - - - - - - -
RS Stock No. 321-8210
Mfr. Part No.83 161 118
BrandCrouzet
$4.10
Each
units
Button Tab 16 A @ 250 V ac SPDT-NO/NC IP40 3 N -20°C +125°C - Silver Nickel Polyamide 10000000Operations 1N -20 → +125°C
RS Stock No. 219-3788
Mfr. Part No.83 160 347
BrandCrouzet
$17.07
Each
units
Lever Tab 10 A @ 250 V ac SPDT - 2 N -20°C +125°C - Nickel Silver Polyamide 10^7Operations 0.6N -20 → +125°C
RS Stock No. 161-6707
Mfr. Part No.83161-3 IW2 F2
BrandCrouzet
$6.15
Each
units
Plunger Solder 20 A @ 250 V ac NO/NC IP40 0.8 N -20°C +125°C V3 Housing Silver Nickel Polyamide 2 x 10^7Operations 0.2N -20 → +125°C
RS Stock No. 321-8226
Mfr. Part No.83 160 703
BrandCrouzet
$13.53
Each
units
Plunger Tab 6 A @ 250 V ac SP-NC - 4 N -40°C +85°C - Nickel Silver Polyamide 10^7Operations 1.5N -40 → +85°C
RS Stock No. 219-3766
Mfr. Part No.83 160 329
BrandCrouzet
$18.64
Each
units
Roller Lever Tab 10 A @ 250 V ac SPDT - 2 N -20°C +125°C - Nickel Silver Polyamide 10^7Operations 0.6N -20 → +125°C
RS Stock No. 161-6640
Mfr. Part No.83170-4 IW2 F1
BrandCrouzet
$8.06
Each
units
Button - 5 A @ 250 V ac NO/NC - 0.6 N -20°C +125°C V4 Housing Silver Nickel PET 3 x 10^7Operations 0.1N -20 → +125°C
RS Stock No. 307-3972
Mfr. Part No.83 186 001
BrandCrouzet
$10.39
Each
units
Button Solder 6 A @ 250 V ac SPDT-NO/NC IP67 2.5 N -40°C +125°C - Gold Plated Silver Cadmium Oxide; Gold Plated Silver Tin Oxide - 2000000Operations 0.8N -40 → +125°C
RS Stock No. 161-6656
Mfr. Part No.83170-9IX1 F1
BrandCrouzet
$8.61
Each
units
Lever - 5 A @ 250 V ac NO/NC - 0.6 N -20°C +125°C V4 Housing Gold Plated Silver Nickel PET 3 x 10^7Operations 0.1N -20 → +125°C
RS Stock No. 219-3750
Mfr. Part No.83160065
BrandCrouzet
$17.03
Each
units
Roller Lever Tab 16 A @ 250 V ac SPDT - 4 N -20°C +125°C - Nickel Silver Polyamide 10^7Operations 1.5N -20 → +125°C
RS Stock No. 700-5734
Mfr. Part No.83240003
BrandCrouzet
$62.58
Each
units
Lever Tab 6 A @ 250 V ac DT-NO/NC IP40 4.5 N -50°C +85°C - Silver Nickel Glass Fibre Reinforced PC 10^7Operations - -50 → +85°C
RS Stock No. 307-3994
Mfr. Part No.83 170 405
BrandCrouzet
$5.12
Each
units
Plunger Solder 5 A @ 250 V ac NO/NC - 0.6 N -20°C +125°C - Silver Nickel PET 3 x 10^7Operations 0.1N -20 → +125°C
RS Stock No. 700-5728
Mfr. Part No.83240000
BrandCrouzet
$45.51
Each
units
Plunger Tab 6 A @ 250 V ac DT-NO/NC IP40 4.5 N -50°C +85°C - Silver Nickel Glass Fibre Reinforced PC 10^7Operations - -50 → +85°C
RS Stock No. 219-3744
Mfr. Part No.83160067
BrandCrouzet
$12.75
Each
units
Lever Tab 16 A @ 250 V ac SPDT - 4 N -20°C +125°C - Nickel Silver Polyamide 10^7Operations 1.5N -20 → +125°C
RS Stock No. 219-3794
Mfr. Part No.83 186 003
BrandCrouzet
$21.28
Each
units
Button Solder 6 A @ 250 V ac SPDT-NO/NC IP67 2.5 N -40°C +125°C - Gold Plated Silver Cadmium Oxide; Gold Plated Silver Tin Oxide - 2000000Operations 0.8N -40 → +125°C
RS Stock No. 307-4010
Mfr. Part No.83 170 902
BrandCrouzet
$6.30
Each
units
Plunger Solder 100 mA @ 250 V ac SPDT - 0.6 N -20°C +125°C V4 Housing Silver Nickel PET 3 x 10^7Operations 0.1N -20 → +125°C