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. 517-628
Mfr. Part No.DC3C-A1SC
BrandZF
TWD95.00
Each
units
Simulated Roller Lever Solder 100 mA @ 30 V dc SPDT-NO/NC IP6K7 0.78 N -40°C +120°C - Gold - 1000000Operations - -40 → +120°C
RS Stock No. 517-763
Mfr. Part No.DB1C-A1LC
BrandZF
TWD73.00
Each
units
Lever Solder 6 A @ 250 V ac SPDT-NO/NC - 0.49 N -40°C +120°C - Gold; Silver Alloy - 15000000Operations - -40 → +120°C
RS Stock No. 804-6278
BrandRS PRO
TWD35.40
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. 820-7379
Mfr. Part No.11SM1-T
BrandHoneywell
TWD275.00
Each
units
Pin Plunger Solder 5 A V dc @ 30 SPDT - 0.83 → 1.39 N -54°C +121°C - Silver Phenolic 10000000Operations 0.28N -54 → +121°C
RS Stock No. 173-9381
Mfr. Part No.XCG3-Z1
TWD31.50
Each (In a Bag of 200)
units
Plunger Solder 5 A @ 250 V ac - - 1.69 N - - - Silver - - 0.3N -
RS Stock No. 706-4086
Mfr. Part No.E13-00J
BrandZF
TWD212.00
Each
units
Button Tab 15 A @ 250 V ac SPDT-NO/NC - 4.17 N - - - Silver Cadmium Oxide - - - -
RS Stock No. 804-6152
Mfr. Part No.D2FS-F-N
BrandOmron
TWD18.40
Each (In a Bag of 5)
units
Pin Plunger PCB Straight 100 mA @ 5 V dc SPST-NO IP40 0.85 N -20°C +70°C - Silver - 100000Operations 0.05N -20 → +70°C
RS Stock No. 341-6521
Mfr. Part No.43782
TWD1,555.00
Each
units
Long Roller Lever Pre-wired 10 A @ 250 V ac SP-NO/NC IP67 4.5 N -10°C +85°C - Silver Zinc 10^6Operations 0.8N -10 → +85°C
RS Stock No. 820-7439
Mfr. Part No.311SM6-T
BrandHoneywell
TWD379.00
Each
units
Roller Lever Solder 5 A @ 250 V ac SPDT - 0.39 N -54°C +121°C - Silver Phenolic 1000000Operations 0.07N -54 → +121°C
RS Stock No. 706-4174
Mfr. Part No.DH2C-C5PA
BrandZF
TWD106.00
Each
units
Lever Left Angle PCB 500 mA @ 30 V dc SPDT-NO/NC - 0.49 N -25°C +70°C - Gold Plated Brass - - - -25 → +70°C
RS Stock No. 173-9384
Mfr. Part No.XCG3-S1-Z1
TWD50.40
Each (In a Bag of 200)
units
Roller Lever Solder 6 A @ 250 V ac SPDT-NO/NC IP40 0.7 N -40°C +85°C - Fine Silver Thermosetting Formaldehyd Melamine 50000000Operations 0.09N -40 → +85°C
RS Stock No. 616-0243
Mfr. Part No.D3V-165-1C5
BrandOmron
TWD103.00
Each
units
Short Roller Lever Tab 16 A @ 250 V ac SPDT-NO/NC IP40 - -25°C +105°C - Silver Alloy - 10000000Operations - -25 → +105°C
RS Stock No. 337-829
Mfr. Part No.11SM3-T2
BrandHoneywell
TWD246.00
Each
units
Plunger Solder 5 A @ 250 V ac SPDT-NO/NC - 1.39 N - - - - - - 0.28N -
RS Stock No. 472-8055
Mfr. Part No.XCG3-Z1
TWD178.00
Each
units
Plunger Solder 5 A @ 250 V ac - - 1.69 N - - - Silver - - 0.3N -
RS Stock No. 686-6792
Mfr. Part No.D2SW-P01L3M
BrandOmron
TWD152.00
Each
units
Simulated Roller Lever Pre-wired 100 mA @ 30 V dc SPDT-NO/NC IP67 0.6 N -20°C +70°C - Gold Alloy - 1000000Operations 0.05N -20 → +70°C
RS Stock No. 616-0215
Mfr. Part No.D3V-16-1C5
BrandOmron
TWD67.00
Each
units
Pin Plunger Tab 16 A @ 250 V ac SPDT-NO/NC IP40 1.96 N -25°C +105°C - Silver Alloy - 10000000Operations 0.49N -25 → +105°C
RS Stock No. 517-713
Mfr. Part No.DB1C-B1LC
BrandZF
TWD56.00
Each
units
Hinge Lever Tab 6 A @ 250 V ac SPDT-NO/NC - 0.49 N -40°C +120°C - Gold; Silver Alloy - 15000000Operations - -40 → +120°C
RS Stock No. 616-0209
Mfr. Part No.D3V-161-1C5
BrandOmron
TWD72.00
Each
units
Short 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. 616-0439
Mfr. Part No.D2JW-01K21
BrandOmron
TWD251.00
Each
units
Roller Lever Solder 100 mA @ 30 V dc SPDT-NO/NC IP67 0.98 N -40°C +85°C - Gold Alloy - 1000000Operations 0.2N -40 → +85°C
RS Stock No. 804-6265
BrandRS PRO
TWD44.60
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