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. 414-5646
Mfr. Part No.4BR
R 858.58
Each
units
Plunger Screw 15 A @ 250 V ac SP-NO/NC IP54 7.2 N -10°C +85°C - Silver Zinc Alloy 10^6Operations 1.7N -10 → +85°C
RS stock no. 173-9367
Mfr. Part No.01710
R 695.721
Each (In a Bag of 14)
units
Plunger Screw 15 A @ 250 V ac SP-NO/NC IP54 7.2 N -10°C +85°C - Silver Zinc Alloy 10^6Operations 1.7N -10 → +85°C
RS stock no. 664-727
Mfr. Part No.3BR/2663
R 587.74
Each
units
Plunger Screw 15 A @ 250 V ac SP-NO/NC IP54 7.2 N -40°C +85°C - Silver Phenolic 10^6Operations 1.7N -40 → +85°C
RS stock no. 301-2214
Mfr. Part No.V3F
R 410.58
Each
units
Plunger Screw 1 A @ 250 V ac SPDT IP40 3.3 N -40°C +240°C - Silver Polyphenylene Sulphide 10^7Operations 1.1N -40 → +240°C
RS stock no. 515-690
Mfr. Part No.V15T16-EZ100A06
BrandHoneywell
R 73.07
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. 682-2660
Mfr. Part No.SS-5GL2
BrandOmron
R 22.312
Each (In a Pack of 5)
units
Roller 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. 616-0114
Mfr. Part No.D2F-L
BrandOmron
R 27.248
Each (In a Pack of 5)
units
Hinge Lever PCB 3 A @ 125 V ac SPDT-NO/NC IP40 0.78 N -25°C +65°C - Silver Alloy - 1000000Operations 0.05N -25 → +65°C
RS stock no. 150-710
Mfr. Part No.DC1C-A1LD
BrandZF
R 72.81
Each
units
Long Hinge Lever Solder 6 A @ 250 V ac SPDT-NO/NC IP6K7 - -40°C +120°C - Silver Alloy - 1000000Operations - -40 → +120°C
RS stock no. 797-2523
BrandRS PRO
R 123.06
Each
units
Plunger Screw 15 A @ 250 V ac SP-CO - 428 gms - - - Fine Silver Plastic 1000000Operations 173gf -
RS stock no. 472-8257
Mfr. Part No.XGG2-88-S20Z1
R 105.54
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. 616-0136
Mfr. Part No.D2F-01
BrandOmron
R 21.882
Each (In a Pack of 5)
units
Pin Plunger PCB 100 mA @ 30 V dc SPDT-NO/NC IP40 1.47 N -25°C +65°C - Gold Alloy - 1000000Operations 0.2N -25 → +65°C
RS stock no. 682-2746
Mfr. Part No.V-152-1C25
BrandOmron
R 57.12
Each
units
Hinge Lever Tab 15 A @ 250 V ac SPDT-NO/NC IP40 1.23 N -25°C +80°C - Silver Alloy - 50000000Operations 0.14N -25 → +80°C
RS stock no. 157-1008
Mfr. Part No.V4NT7
R 47.17
Each
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. 173-9397
Mfr. Part No.42394
R 19.816
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. 517-527
Mfr. Part No.GPTCNH01
BrandZF
R 145.54
Each
units
Plunger 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. 150-732
Mfr. Part No.F69-65A
BrandZF
R 99.53
Each
units
Plunger Solder 10 A SP-NO/NC - - -40°C +85°C - - - 2 x 10^5Operations - -40 → +85°C
RS stock no. 505-9192
Mfr. Part No.KMR231GLFS
BrandC & K
R 2.793
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. 883-1631
Mfr. Part No.V9N
R 434.69
Each
units
Plunger Screw 10 A SP-CO IP67 5.5 N -40°C +125°C - Silver Zinc Die Cast 1000000Cycles 1N -40 → +125°C
RS stock no. 173-9354
Mfr. Part No.42393
R 24.571
Each (In a Bag of 500)
units
Plunger Solder 5 A @ 250 V ac SPDT IP67 0.5 N -40°C +85°C - - - 3 x 10^6Operations 0.1N -40 → +85°C
RS stock no. 319-922
Mfr. Part No.BZ-2RQ18M-A2
BrandHoneywell
R 2,277.24
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