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. 505-9192
Mfr. Part No.KMR231G LFS
BrandC & K
TWD15.80
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. 863-7089
Mfr. Part No.ZMA03A150L04PC
BrandC & K
TWD35.60
Each (In a Bag of 5)
units
Lever - 3 A SP-CO - - -40°C +85°C - Silver - - - -
RS Stock No. 153-4151
Mfr. Part No.MS-118305-H
BrandC & K
TWD16,435.00
1 Pack of 1000
Pack(s)
Lever Pc Pin 100 mA @ 30 V dc SP-CO - 70 gf -20°C +70°C - Silver Plated PBT 50000 cycles, 500000 cycles - -20 → +70°C
RS Stock No. 154-3599
Mfr. Part No.MS-118305-H
BrandC & K
TWD23.30
Each (In a Pack of 10)
units
Lever Pc Pin 100 mA @ 30 V dc SP-CO - 70 gf -20°C +70°C - Silver Plated PBT 50000 cycles, 500000 cycles - -20 → +70°C
RS Stock No. 154-2573
Mfr. Part No.LCA06150P00PC
BrandC & K
TWD77.20
Each (In a Pack of 5)
units
Pin Plunger Pc Pin 6 A @ 125 / 250 V ac SP-CO - 150 g -40°C +125°C - Copper Alloy Thermoplastic Polyester PET - - -40 → +125°C
RS Stock No. 154-3591
Mfr. Part No.MS-118305-A
BrandC & K
TWD19.80
Each (In a Pack of 10)
units
Lever Pc Pin 100 mA @ 30 V dc SP-CO - 25 gf -20°C +70°C - Silver Plated PBT 50000 cycles, 500000 cycles - -20 → +70°C
RS Stock No. 153-4148
Mfr. Part No.MMGGF5L2T
BrandC & K
TWD749.60
Each (In a Tray of 50)
units
Leaf Pc Pin 1 A @ 125 V ac, 1 A @ 30 V dc SP-CO - 142 g -55°C +135°C - Copper Alloy Phenolic - - -55 → +135°C
RS Stock No. 161-2425
Mfr. Part No.ZMSL03130T10LLC
BrandC & K
TWD137.00
Each
units
Lever Through Hole 3 A @ 12 V dc, 3 A @ 125 V ac SP-CO IP67 130 g -40°C 85°C - Brass Polyamide - - -40 → +85°C
RS Stock No. 161-2378
Mfr. Part No.ZMA03A150L11LC
BrandC & K
TWD41.40
Each (In a Tray of 100)
units
Lever Through Hole 3 A @ 125 V ac, 3 A @ 24 V dc SP-CO - 150 g -40°C 85°C - Brass PBT - - -40 → +85°C
RS Stock No. 153-4143
Mfr. Part No.MDS6500AL02LL
BrandC & K
TWD46.80
Each (In a Pack of 500)
units
Standard Pc Pin 300 mA @ 30 V dc SP-CO - 50 g -25°C +70°C - Copper Alloy PA - - -25 → +70°C
RS Stock No. 505-9057
Mfr. Part No.KSS231G LFS
BrandC & K
TWD19.80
Each (In a Pack of 10)
units
Standard Through Hole 50 mA @ 32 V dc SPST-NO IP 40 2.5 N -40°C +85°C - Silver - 100000Operations - -40 → +85°C
RS Stock No. 154-2582
Mfr. Part No.MMGGF5L2T
BrandC & K
TWD824.00
Each
units
Leaf Pc Pin 1 A @ 125 V ac, 1 A @ 30 V dc SP-CO - 142 g -55°C +135°C - Copper Alloy Phenolic - - -55 → +135°C
RS Stock No. 161-2379
Mfr. Part No.ZMSH03130P00LSC
BrandC & K
TWD67.70
Each (In a Tray of 500)
units
Pin Plunger Through Hole 3 A @ 12 V dc, 3 A @ 125 V ac SP-CO IP67 130 g -40°C 85°C - Brass Polyamide - - -40 → +85°C
RS Stock No. 161-2432
Mfr. Part No.ZMA03A150L04RC
BrandC & K
TWD39.00
Each (In a Pack of 5)
units
Lever Through Hole 3 A @ 125 V ac, 3 A @ 24 V dc SP-CO - 150 g -40°C 85°C - Brass PBT - - -40 → +85°C
RS Stock No. 161-2372
Mfr. Part No.ZMA00A150L04PC
BrandC & K
TWD18.20
Each (In a Tray of 100)
units
Lever Through Hole 100 mA @ 125 V ac, 100 mA @ 60 V dc SP-CO - 150 g -40°C +85°C - Brass PBT - - -40 → +85°C
RS Stock No. 505-9063
Mfr. Part No.KMS231G LFS
BrandC & K
TWD17.60
Each (In a Pack of 10)
units
Standard Through Hole 50 mA @ 32 V dc SPST-NO IP 40 3 N -40°C +85°C - Silver - 100000Operations - -40 → +85°C
RS Stock No. 161-2412
Mfr. Part No.ZMA00A150L04PC
BrandC & K
TWD27.80
Each (In a Pack of 5)
units
Lever Through Hole 100 mA @ 125 V ac, 100 mA @ 60 V dc SP-CO - 150 g -40°C +85°C - Brass PBT - - -40 → +85°C
RS Stock No. 154-4691
Mfr. Part No.LCA01150P00SC
BrandC & K
TWD58.60
Each (In a Pack of 5)
units
Pin Plunger Solder 100 mA @ 125 / 250 V ac SP-CO - 150 g -40°C +125°C - Copper Alloy Thermoplastic Polyester PET - - -40 → +125°C
RS Stock No. 154-4694
Mfr. Part No.MDS6500AL02CL
BrandC & K
TWD90.20
Each (In a Pack of 5)
units
Standard Pc Pin 300 mA @ 30 V dc SP-CO - 50 g -25°C +70°C - Copper Alloy PA - - -25 → +70°C
RS Stock No. 161-2416
Mfr. Part No.ZMSH03130T11RSC
BrandC & K
TWD118.00
Each
units
Simulated Roller Lever Through Hole 3 A @ 12 V dc, 3 A @ 125 V ac SP-CO IP67 130 g -40°C 85°C - Brass Polyamide - - -40 → +85°C