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. 842-6343
Mfr. Part No.311SM3-T
BrandHoneywell
MYR56.29
Each
units
Straight Lever Solder 5 A SP-CO - 0.15 N -54°C +121°C - Gold Plated Silver Phenolic - 0.02N -54 → +121°C
RS Stock No. 472-8235
Mfr. Part No.XGG2-88-J26Z1
MYR20.05
Each
units
Lever Tab 16 A @ 250 V ac SPDT-NO/NC IP40 0.91 N -40°C +85°C - Fine Silver; Silver Nickel Melamine Formaldehyd Thermosetting 50000000Operations - -40 → +85°C
RS Stock No. 307-3994
Mfr. Part No.83 170 405
BrandCrouzet
MYR19.45
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. 173-8402
Mfr. Part No.AV404461
BrandPanasonic
MYR10.099
Each (In a Box of 50)
units
Simulated Roller Lever Solder 100 mA @ 30 V dc SP-CO - 0.29 N -25°C +80°C - Gold Plated - 3 x 10^5Operations - -25 → +80°C
RS Stock No. 682-2623
Mfr. Part No.SS-01GL2-F
BrandOmron
MYR17.47
Each
units
Roller Lever Solder 100 mA @ 30 V dc SPDT-NO/NC IP40 0.16 N -25°C +85°C - Gold Alloy - 30000000Operations 0.02N -25 → +85°C
RS Stock No. 517-753
Mfr. Part No.DB1C-A1RB
BrandZF
MYR9.03
Each
units
Short Roller Lever Solder 6 A @ 250 V ac SPDT-NO/NC - 0.64 N -40°C +120°C - Gold; Silver Alloy - 15000000Operations - -40 → +120°C
RS Stock No. 794-4014
Mfr. Part No.D3SHA1L1
BrandOmron
MYR7.49
Each
units
Long Straight Lever Solder 1 mA @ 30 V dc SPST - 0.24 N -25°C +85°C - - - 150000Operations - -25 → +85°C
RS Stock No. 517-820
Mfr. Part No.DB3C-A1AA
BrandZF
MYR11.47
Each
units
Button Solder 100 mA @ 30 V dc SPDT-NO/NC - 1.47 N -40°C +120°C - Gold; Silver Alloy - 15000000Operations - -40 → +120°C
RS Stock No. 682-2477
Mfr. Part No.D3V-163-3C5
BrandOmron
MYR12.832
Each (In a Pack of 5)
units
Long Hinge Lever Tab 16 A @ 250 V ac SPST-NO IP40 - -25°C +105°C - Silver Alloy - 10000000Operations - -25 → +105°C
RS Stock No. 616-0079
Mfr. Part No.SSG-5L2H
BrandOmron
MYR11.82
Each
units
Roller Lever Solder 5 A @ 125 V ac SPDT-NO/NC IP40 0.6 N -25°C +125°C - Silver - 10000000Operations 0.06N -25 → +125°C
RS Stock No. 699-4475
Mfr. Part No.AV404461
BrandPanasonic
MYR11.78
Each
units
Simulated Roller Lever Solder 100 mA @ 30 V dc SPDT - 0.29 N -25°C +80°C - Gold Plated - 3 x 10^5Operations - -25 → +80°C
RS Stock No. 472-8257
Mfr. Part No.XGG2-88-S20Z1
MYR32.40
Each
units
Roller Lever Tab 16 A @ 250 V ac SPDT-NO/NC IP40 3.2 N -40°C +85°C - Fine Silver; Silver Nickel Melamine Formaldehyd Thermosetting 50000000Operations 0.37N -40 → +85°C
RS Stock No. 804-6234
BrandRS PRO
MYR12.60
Each
units
Plunger Quick Connect 16 A @ 250 V ac SP-CO - 400 gms -55 (Environmental)°C +85°C V3 Housing Silver on Copper Glass Filled Thermoplastic 10000000Operations 80gf -55 → +85 (Environmental)°C
RS Stock No. 517-634
Mfr. Part No.DB2C-B1RC
BrandZF
MYR16.02
Each
units
Roller Lever Tab 10.1 A @ 250 V ac SPDT-NO/NC - 0.93 N -40°C +120°C - Gold; Silver Alloy - 15000000Operations - -40 → +120°C
RS Stock No. 686-6963
Mfr. Part No.D2SW-3L1MS
BrandOmron
MYR39.63
Each
units
Hinge Lever Pre-wired 3 A @ 30 V dc SPDT-NO/NC IP67 0.59 N -40°C +85°C - Silver - 5000000Operations 0.06N -40 → +85°C
RS Stock No. 616-0473
Mfr. Part No.VX5-1A2
BrandOmron
MYR18.08
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. 842-6359
Mfr. Part No.311SM68-T
BrandHoneywell
MYR96.22
Each
units
Roller Lever Solder 1 A SP-CO - 0.39 N -54°C +121°C - Gold Plated Silver Phenolic - 0.07N -54 → +121°C
RS Stock No. 321-8210
Mfr. Part No.83 161 118
BrandCrouzet
MYR27.68
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. 173-9397
Mfr. Part No.42394
MYR6.573
Each (In a Bag of 200)
units
Plunger Solder - SP-NO/NC IP40 1.4 N -40°C +85°C - Silver Glass Fibre Reinforced Nylon 5 x 10^6Operations 0.28N -40 → +85°C
RS Stock No. 794-4011
Mfr. Part No.V1021C4
BrandOmron
MYR17.07
Each
units
Hinge Lever Quick Connect 10 A @ 250 V ac SPDT IP40 0.59 N -25°C +80°C - Silver - 50000000Operations - -25 → +80°C