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. 842-6346
Mfr. Part No.311SM4-T
BrandHoneywell
TWD303.00
Each
units
Roller Lever Solder 5 A SP-CO - 0.39 N -54°C +121°C - Gold Plated Silver Phenolic - 0.07N -54 → +121°C
RS Stock No. 842-8709
Mfr. Part No.BZ-2RQ784
BrandHoneywell
TWD1,751.00
Each
units
Plunger Screw 15 A SP-CO - 2.5 → 3.61 N -55°C +85°C - Silver Phenolic 20000000Operations 1.11N -55 → +85°C
RS Stock No. 842-8790
Mfr. Part No.BZ-2RW8244-A2
BrandHoneywell
TWD628.00
Each
units
Straight Lever Screw 5 A SP-CO - 0.7 N -53°C +204°C - Silver Phenolic 20000000Operations 0.14N -53 → +204°C
RS Stock No. 515-751
Mfr. Part No.V15T16-CZ100A05
BrandHoneywell
TWD136.00
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. 515-741
Mfr. Part No.V15T16-CZ100A06
BrandHoneywell
TWD124.00
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. 842-6249
Mfr. Part No.111SM2-T
BrandHoneywell
TWD567.00
Each
units
Roller Lever Solder 5 A SP-CO - 1.95 N -54°C +121°C - Gold Plated Silver Phenolic 10000000Operations 0.56N -54 → +121°C
RS Stock No. 515-690
Mfr. Part No.V15T16-EZ100A06
BrandHoneywell
TWD147.00
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. 842-6374
Mfr. Part No.311SX1-T
BrandHoneywell
TWD834.00
Each
units
Straight Lever Solder 5 A SP-CO - 0.49 N -54°C +121°C - Gold Plated Silver Phenolic 10000000Operations 0.09N -54 → +121°C
RS Stock No. 515-666
Mfr. Part No.V15H16-CZ100A06
BrandHoneywell
TWD164.00
Each
units
Roller Lever - 16 A @ 250 V ac SPDT-NO/NC - - - - - - - - - -
RS Stock No. 842-6560
Mfr. Part No.BZ-2RD
BrandHoneywell
TWD919.40
Each (In a Pack of 5)
units
Plunger Screw 15 A SP-CO - 2.5 → 3.61 N -55°C +85°C - Silver Phenolic 20000000Operations 1.11N -55 → +85°C
RS Stock No. 820-7401
Mfr. Part No.13AC1
BrandHoneywell
TWD1,631.00
Each
units
Rod Screw 15 A @ 250 V ac SP-CO - - -18°C +149°C - Silver Stainless Steel - - -18 → +149°C
RS Stock No. 820-7439
Mfr. Part No.311SM6-T
BrandHoneywell
TWD399.00
Each
units
Roller Lever Solder 5 A @ 250 V ac SP-CO - 0.39 N -54°C +121°C - Silver Phenolic 1000000Operations 0.07N -54 → +121°C
RS Stock No. 820-7473
Mfr. Part No.BZ-2RQ1-A2
BrandHoneywell
TWD391.00
Each
units
Plunger Screw - SP-CO IP65 - - - - - - - - -
RS Stock No. 842-6378
Mfr. Part No.311SX2-T
BrandHoneywell
TWD494.00
Each
units
Straight Lever Solder 5 A SP-CO - 0.31 N -54°C +121°C - Gold Plated Silver Phenolic 10000000Operations 0.05N -54 → +121°C
RS Stock No. 334-381
Mfr. Part No.1SX1-T
BrandHoneywell
TWD585.00
Each
units
Button Solder 7 A @ 250 V ac SPDT-NO/NC - 1.39 N -54°C +121°C - - - 1000000Operations 0.28N -54 → +121°C
RS Stock No. 334-404
Mfr. Part No.BZ-2RW822-A2
BrandHoneywell
TWD518.00
Each
units
Short Roller Lever Screw 15 A @ 125 V ac SPDT-NO/NC - 1.67 N - - - Fine Silver - - 0.42N -
RS Stock No. 337-829
Mfr. Part No.11SM3-T2
BrandHoneywell
TWD244.00
Each
units
Plunger Solder 5 A @ 250 V ac SPDT-NO/NC - 1.39 N - - - - - - 0.28N -
RS Stock No. 842-6359
Mfr. Part No.311SM68-T
BrandHoneywell
TWD656.00
Each
units
Roller Lever Solder 1 A SP-CO - 0.39 N -54°C +121°C - Gold Plated Silver Phenolic - 0.07N -54 → +121°C
RS Stock No. 820-7379
Mfr. Part No.11SM1-T
BrandHoneywell
TWD419.00
Each
units
Pin Plunger Solder 5 A V dc @ 30 SP-CO - 0.83 → 1.39 N -54°C +121°C - Silver Phenolic 10000000Operations 0.28N -54 → +121°C
RS Stock No. 515-785
Mfr. Part No.V15H22-CZ100A03
BrandHoneywell
TWD203.00
Each
units
Long Leaf Lever - 22 A @ 250 V ac SPDT-NO/NC - - - - - - - - - -