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. 301-2214
Mfr. Part No.13216
$47.42
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. 804-6192
BrandRS PRO
$6.19
Each
units
Push Button Solder 16 A @ 250 V ac SPDT - 400 gms -55 (Environmental)°C +85°C V3 Housing Silver on Copper Glass Filled Thermoplastic 10000000Operations 80gf -55 → +85 (Environmental)°C
RS Stock No. 515-688
Mfr. Part No.V15T16-EZ100A05
BrandHoneywell
$10.18
Each
units
Short 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. 515-690
Mfr. Part No.V15T16-EZ100A06
BrandHoneywell
$8.83
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. 319-916
Mfr. Part No.BZ-2RQ1M-A2
BrandHoneywell
$72.65
Each
units
Plunger Screw 16 A @ 250 V ac SPDT-NO/NC - 3.63 N - - - - - - 1.08N -
RS Stock No. 682-1493
Mfr. Part No.D2F-01F-T
BrandOmron
$2.792
Each (In a Pack of 5)
units
Pin Plunger PCB 100 mA @ 30 V dc SPDT-NO/NC IP40 0.74 N -25°C +65°C - Gold Alloy - 1000000Operations 0.05N -25 → +65°C
RS Stock No. 539-309
Mfr. Part No.83137004
BrandCrouzet
$34.79
Each
units
- - - - - - - - - - - - - -
RS Stock No. 706-4228
Mfr. Part No.D443-P4AA
BrandZF
$4.77
Each
units
Button PCB 10 A @ 250 V ac SPDT-NO/NC - 2.79 N -40°C +85°C - Silver Alloy - - - -40 → +85°C
RS Stock No. 173-9367
Mfr. Part No.01710
$130.779
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. 842-1515
Mfr. Part No.DT-2RV3-A7
BrandHoneywell
$279.20
Each
units
Straight Lever Screw 10 A DPDT - 1.11 → 1.95 N -55°C +85°C - Silver Phenolic 3000000Operations 0.14N -55 → +85°C
RS Stock No. 682-1581
Mfr. Part No.D2HW-BL203MR
BrandOmron
$7.69
Each
units
Pin Plunger Pre-wired 2 A @ 12 V dc SPST-NO IP67 0.75 N -40°C +85°C - Gold Alloy - 1000000Operations 0.1N -40 → +85°C
RS Stock No. 320-528
Mfr. Part No.DC1C-C3RC
BrandZF
$20.65
Each
units
Roller Lever Through Hole 6 A @ 250 V ac SPDT-NO/NC IP6K7 0.78 N -40°C +105°C - Silver Alloy - 1000000Operations - -40 → +105°C
RS Stock No. 173-8222
Mfr. Part No.ABJ141260
BrandPanasonic
$3.207
Each (In a Box of 100)
units
Hinge Lever Solder 2 A @ 30 V dc SPDT IP50 0.64 N -40°C +85°C - Silver Nickel Alloy - 10^6Operations 0.049N -40 → +85°C
RS Stock No. 868-1903
Mfr. Part No.D443-R1RD-G2
BrandZF
$9.83
Each
units
Roller 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. 414-5646
Mfr. Part No.4BR
$134.08
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. 159-4455
Mfr. Part No.D459-V3RA
BrandZF
$6.856
Each (In a Pack of 5)
units
Short Roller Lever Tab 16 A @ 250 V ac SPDT-NO/NC - 0.98 N -40°C +85°C - Silver Alloy - - - -40 → +85°C
RS Stock No. 698-9463
Mfr. Part No.ABJ141260
BrandPanasonic
$4.77
Each
units
Hinge Lever Solder 2 A @ 30 V dc SPDT IP50 0.64 N -40°C +85°C - Silver Nickel Alloy - 10^6Operations 0.049N -40 → +85°C
RS Stock No. 682-2736
Mfr. Part No.SSG-5P-5
BrandOmron
$3.03
Each
units
Pin Plunger PCB 5 A @ 125 V ac SPDT-NO/NC IP40 0.5 N -25°C +125°C - Silver - 10000000Operations 0.04N -25 → +125°C
RS Stock No. 321-8210
Mfr. Part No.83 161 118
BrandCrouzet
$9.51
Each
units
Button Tab 16 A @ 250 V ac SPDT-NO/NC IP40 3 N -20°C +125°C - Silver Nickel Polyamide 10000000Operations 1N -20 → +125°C
RS Stock No. 472-8235
Mfr. Part No.XGG2-88-J26Z1
$6.79
Each
units
Lever Tab 16 A @ 250 V ac SPDT-NO/NC IP40 0.91 N -40°C +85°C - Fine Silver; Silver Nickel Melamine Formaldehyd Thermosetting 50000000Operations - -40 → +85°C
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