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. 159-4411
Mfr. Part No.D459-V3AA
BrandZF
$4.612
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. 616-0158
Mfr. Part No.D2F-01L
BrandOmron
$2.314
Each (In a Pack of 5)
units
Hinge Lever PCB 100 mA @ 30 V dc SPDT-NO/NC IP40 0.78 N -25°C +65°C - Gold Alloy - 1000000Operations 0.05N -25 → +65°C
RS Stock No. 682-2746
Mfr. Part No.V-152-1C25
BrandOmron
$6.83
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. 515-757
Mfr. Part No.V15T16-CZ100A03
BrandHoneywell
$4.25
Each
units
Long Leaf 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. 173-9379
Mfr. Part No.44712
$13.822
Each (In a Bag of 20)
units
Lever Pre-wired 5 A @ 250 V ac SP-NO/NC IP6K7 2 N -40°C +85°C - Fine Silver Glass Fibre Reinforced PA 10^5Operations 0.3N -40 → +85°C
RS Stock No. 456-4621
Mfr. Part No.V4LSA2
$23.62
Each
units
Lever Pre-wired 5 A @ 250 V ac SP-NO/NC IP6K7 2 N -40°C +85°C - Fine Silver Glass Fibre Reinforced PA 10^5Operations 0.3N -40 → +85°C
RS Stock No. 616-0215
Mfr. Part No.D3V-16-1C5
BrandOmron
$5.37
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. 515-779
Mfr. Part No.V15T16-CZ100A02
BrandHoneywell
$5.33
Each
units
Leaf 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. 682-2774
Mfr. Part No.V-155-1C25
BrandOmron
$7.20
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. 159-4449
Mfr. Part No.D459-V3RD
BrandZF
$7.016
Each (In a Pack of 5)
units
Roller Lever Tab 16 A @ 250 V ac SPDT-NO/NC - 0.49 N -40°C +85°C - Silver Alloy - - - -40 → +85°C
RS Stock No. 103-1667
Mfr. Part No.V-166-1C5(R)
BrandOmron
$7.45
Each
units
Long Roller Lever Tab 16 A @ 250 V ac SPDT IP40 1.96 N -25°C +80°C - Silver Alloy Thermoplastic 50000000Operations 0.14N -25 → +80°C
RS Stock No. 334-404
Mfr. Part No.BZ-2RW822-A2
BrandHoneywell
$33.90
Each
units
Short Roller Lever Screw 15 A @ 125 V ac SPDT-NO/NC - 1.67 N - - - Fine Silver - - 0.42N -
RS Stock No. 686-7613
Mfr. Part No.V151C25
BrandOmron
$4.928
Each (In a Bag of 5)
units
Pin Plunger Tab 15 A @ 250 V ac SPDT-NO/NC IP40 1.96 N -25°C +80°C - Silver Alloy - 50000000Operations 0.49N -25 → +80°C
RS Stock No. 517-911
Mfr. Part No.GPTCRH01
BrandZF
$35.10
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. 616-0596
Mfr. Part No.D2SW-3L2M
BrandOmron
$13.95
Each
units
Roller 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. 868-1907
Mfr. Part No.D449-R1LL-G2
BrandZF
$10.61
Each
units
Straight Lever Quick Connect 6 A @ 30 V dc, 10 A @ 125/250 V ac SPDT IP50 - -40°C +150°C - Silver Alloy Thermoplastic Polyester PET - - -40 → +150°C
RS Stock No. 320-512
Mfr. Part No.DC1C-C3LC
BrandZF
$19.48
Each
units
Lever Through Hole 6 A @ 250 V ac SPDT-NO/NC IP6K7 0.69 N -40°C +105°C - Silver Alloy - 1000000Operations - -40 → +105°C
RS Stock No. 682-2503
Mfr. Part No.D3V-16-3C5
BrandOmron
$1.748
Each (In a Pack of 5)
units
Pin Plunger Tab 16 A @ 250 V ac SPST-NO IP40 - -25°C +105°C - Silver Alloy - 10000000Operations - -25 → +105°C
RS Stock No. 517-652
Mfr. Part No.DC3C-H1AA
BrandZF
$5.96
Each
units
Button Solder 100 mA @ 30 V dc SPDT-NO/NC IP6K7 1.96 N -40°C +120°C - Gold - 1000000Operations - -40 → +120°C
RS Stock No. 173-9354
Mfr. Part No.42393
$2.973
Each (In a Bag of 500)
units
Plunger Solder 5 A @ 250 V ac SPDT IP67 0.5 N -40 +85°C - - - 3 x 10^6Operations 0.1N -40 → +85°C
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