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. 842-1789
Mfr. Part No.V7-1Z19E9
BrandHoneywell
$9.36
Each
units
Pin Plunger Quick Connect 25 A SPDT - 2.21 N -40°C +85°C V7 Housing Silver/Gold Plated/Gold Alloy Thermoplastic 10000000Cycles 0.2N -40 → +85°C
RS Stock No. 320-528
Mfr. Part No.DC1C-C3RC
BrandZF
$19.14
Each
units
Roller Lever Through Hole 6 A @ 250 V ac SPDT-NO/NC IP6K7 0.78 N -40°C +105°C - Silver Alloy - 1000000Operations - -40 → +105°C
RS Stock No. 161-6713
Mfr. Part No.83161-3 IW3 F2
BrandCrouzet
$7.39
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. 173-9373
Mfr. Part No.44710
$12.078
Each (In a Bag of 20)
units
Plunger Pre-wired 5 A @ 250 V ac SP-NO/NC IP6K7 2.5 N -40°C +85°C - Fine Silver Glass Fibre Reinforced PA 10^5Operations 0.5N -40 → +85°C
RS Stock No. 515-741
Mfr. Part No.V15T16-CZ100A06
BrandHoneywell
$5.74
Each
units
Roller Lever Tab 16 A @ 250 V ac SPDT-NO/NC - 0.98 N -25°C +125°C - Silver Cadmium Oxide Polybutylene Terephthalate PET Thermoplastic 5000000Operations 0.25N -25 → +125°C
RS Stock No. 456-4637
Mfr. Part No.V4LS
$24.62
Each
units
Plunger Pre-wired 5 A @ 250 V ac SP-NO/NC IP6K7 2.5 N -40°C +85°C - Fine Silver Glass Fibre Reinforced PA 10^5Operations 0.5N -40 → +85°C
RS Stock No. 616-0259
Mfr. Part No.D3V-163-1C5
BrandOmron
$4.16
Each
units
Long Hinge Lever Tab 16 A @ 250 V ac SPDT-NO/NC IP40 - -25°C +105°C - Silver Alloy - 10000000Operations - -25 → +105°C
RS Stock No. 159-4629
Mfr. Part No.DB1C-A1RC
BrandZF
$4.15
Each
units
Roller Lever Solder 6 A @ 250 V ac SPDT-NO/NC IP50 0.54 N -40°C +120°C - Gold; Silver Alloy - 15000000Operations - -40 → +120°C
RS Stock No. 505-9192
Mfr. Part No.KMR231G LFS
BrandC & K
$0.879
Each (In a Pack of 10)
units
Tactile Through Hole 50 mA @ 32 V dc SPST-NO - 3 N -40°C +85°C - Silver - 150000Operations - -40 → +85°C
RS Stock No. 319-922
Mfr. Part No.BZ-2RQ18M-A2
BrandHoneywell
$258.02
Each
units
Roller Plunger Screw 15 A @ 480 V ac SPDT - 3.628 N -55°C +85°C - Silver Polybutylene Terephthalate 10^7Operations 3.88N -55 → +85°C
RS Stock No. 159-4635
Mfr. Part No.DB1C-C1AA
BrandZF
$3.92
Each
units
Button Through Hole 6 A @ 250 V ac SPDT-NO/NC - 1.47 N -40°C +120°C - Gold; Silver Alloy - 15000000Operations - -40 → +120°C
RS Stock No. 517-523
Mfr. Part No.GPTCNC01
BrandZF
$17.36
Each
units
Button Screw 15 A @ 250 V ac SPDT-NO/NC - 3.42 N -20°C +85°C - Silver Alloy - 1000000Operations 1.11N -20 → +85°C
RS Stock No. 333-445
Mfr. Part No.BZ-2R-A2
BrandHoneywell
$40.61
Each
units
Pin Plunger Screw 15 A @ 125 V ac SPDT-NO/NC - 3.61 N - - - - - - 1.11N -
RS Stock No. 317-998
Mfr. Part No.V3S-UL
$44.21
Each
units
Plunger Pre-wired 5 A @ 250 V ac SP-NO/NC IP67 3.9 N -40°C +85°C - Silver Glass Fibre Reinforced Nylon 10^6Operations 1.1N -40 → +85°C
RS Stock No. 682-0866
Mfr. Part No.SS-5GL
BrandOmron
$3.23
Each (In a Pack of 5)
units
Hinge Lever Solder 5 A @ 125 V ac SPDT-NO/NC IP40 0.49 N -25°C +85°C - Silver - 30000000Operations 0.06N -25 → +85°C
RS Stock No. 842-1717
Mfr. Part No.V7-1C13D8-201
BrandHoneywell
$8.57
Each
units
Roller Lever Quick Connect 15 A SPDT - 1.72 N -40°C +85°C V7 Housing Silver/Gold Plated/Gold Alloy Thermoplastic 10000000Cycles 0.19N -40 → +85°C
RS Stock No. 173-9300
Mfr. Part No.V3S-UL
$25.851
Each (In a Bag of 50)
units
Plunger Pre-wired 5 A @ 250 V ac SP-NO/NC IP67 3.9 N -40°C +85°C - Silver Glass Fibre Reinforced Nylon 10^6Operations 1.1N -40 → +85°C
RS Stock No. 616-0473
Mfr. Part No.VX5-1A2
BrandOmron
$6.33
Each
units
Pin Plunger Solder 5 A @ 250 V ac SPDT-NO/NC IP40 0.25 N -25°C +80°C - Silver Alloy - 50000000Operations 0.03N -25 → +80°C
RS Stock No. 161-7306
Mfr. Part No.83 123 0-2,2M
BrandCrouzet
$164.40
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. 173-9368
Mfr. Part No.4BRSH
$87.414
Each (In a Bag of 25)
units
Plunger Pre-wired 15 A @ 250 V ac SPDT IP67 7.2 N -40°C +85°C - Silver Zinc Alloy 1000000Operations 1.7N -40 → +85°C
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