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. 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. 307-4004
Mfr. Part No.83 170 408
BrandCrouzet
TWD103.00
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. 517-595
Mfr. Part No.DC3C-A1LB
BrandZF
TWD175.00
Each
units
Short 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. 820-7379
Mfr. Part No.11SM1-T
BrandHoneywell
TWD277.00
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. 173-9391
Mfr. Part No.V4NSY1UL
TWD189.50
Each (In a Bag of 50)
units
Short Lever Pre-wired 3 A @ 250 V ac SPDT-NO/NC IP67 0.9 N -40°C +85°C - Fine Silver Glass Fibre Reinforced Nylon 5000000Operations 0.07N -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
RS Stock No. 706-4174
Mfr. Part No.DH2C-C5PA
BrandZF
TWD105.00
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. 686-6792
Mfr. Part No.D2SW-P01L3M
BrandOmron
TWD153.00
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. 682-0853
Mfr. Part No.SS-5-2
BrandOmron
TWD79.80
Each (In a Pack of 5)
units
Pin Plunger Solder 5 A @ 125 V ac SPST-NC IP40 1.47 N -25°C +85°C - Silver - 30000000Operations 0.25N -25 → +85°C
RS Stock No. 682-1878
Mfr. Part No.D2HW-C201H
BrandOmron
TWD96.00
Each
units
Pin Plunger Solder 2 A @ 12 V dc SPDT-NO/NC IP67 0.75 N -40°C +85°C - Gold Alloy - 1000000Operations 0.1N -40 → +85°C
RS Stock No. 173-9363
Mfr. Part No.43782
TWD1,522.10
Each (In a Bag of 20)
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. 161-6656
Mfr. Part No.83170908
BrandCrouzet
TWD144.00
Each
units
Push Button - 5 A @ 250 V ac NO/NC - 0.6 N -20°C +125°C V4 Housing Gold Plated Silver Nickel PA 6.6 3 x 10^7Operations 0.1N -20 → +125°C
RS Stock No. 682-2774
Mfr. Part No.V-155-1C25
BrandOmron
TWD120.00
Each
units
Short Roller Lever Tab 15 A @ 250 V ac SPDT-NO/NC IP40 2.35 N -25°C +80°C - Silver Alloy - 50000000Operations 0.49N -25 → +80°C
RS Stock No. 173-9385
Mfr. Part No.XCG5-S1-Z1
TWD148.50
Each (In a Bag of 200)
units
Roller Lever Tab 5 A @ 250 V ac - - 0.69 N - - - Gold; Silver - - 0.09N -
RS Stock No. 682-0835
Mfr. Part No.SS-10GL13
BrandOmron
TWD90.00
Each
units
Simulated Roller Lever Solder 10.1 A @ 250 V ac SPDT-NO/NC IP40 0.49 N -25°C +85°C - Silver Alloy - 10000000Operations 0.06N -25 → +85°C
RS Stock No. 159-4411
Mfr. Part No.D459-V3AA
BrandZF
TWD50.40
Each (In a Pack of 5)
units
Button Tab 16 A @ 250 V ac SPDT-NO/NC - 0.98 N -40°C +85°C - Silver Alloy - - - -40 → +85°C
RS Stock No. 842-6359
Mfr. Part No.311SM68-T
BrandHoneywell
TWD643.00
Each
units
Roller Lever Solder 1 A SPDT - 0.39 N -54°C +121°C - Gold Plated Silver Phenolic - 0.07N -54 → +121°C
RS Stock No. 472-8055
Mfr. Part No.XCG3-Z1
TWD185.00
Each
units
Plunger Solder 5 A @ 250 V ac - - 1.69 N - - - Silver - - 0.3N -
RS Stock No. 334-404
Mfr. Part No.BZ-2RW822-A2
BrandHoneywell
TWD485.00
Each
units
Short Roller Lever Screw 15 A @ 125 V ac SPDT-NO/NC - 1.67 N - - - Fine Silver - - 0.42N -
RS Stock No. 472-8112
Mfr. Part No.XCG5-S1-Z1
TWD170.00
Each
units
Roller Lever Tab 5 A @ 250 V ac - - 0.69 N - - - Gold; Silver - - 0.09N -