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. 698-9744
Mfr. Part No.ABS141644
BrandPanasonic
TWD171.00
Each
units
Roller Lever Solder 100 mA @ 30 V dc SPDT IP50 0.39 N -40°C +85°C - Double Clad Gold - 5 x 10^6Operations 0.034N -40 → +85°C
RS Stock No. 173-8371
Mfr. Part No.AVT34223
BrandPanasonic
TWD46.10
Each (In a Box of 100)
units
Hinge Lever PCB 3 A @ 250 V ac SPDT - 0.12 N -25°C +85°C - Silver Nickel Alloy - 5 x 10^5Operations 0.012N -25 → +85°C
RS Stock No. 699-5351
Mfr. Part No.AH1682A
BrandPanasonic
TWD61.00
Each
units
Hinge Lever Solder 1 A @ 30 V dc SPDT - 0.25 N -25°C +85°C - Silver Nickel Alloy - 10^6Operations 0.025N -25 → +85°C
RS Stock No. 699-0445
Mfr. Part No.AVT32023
BrandPanasonic
TWD47.00
Each
units
Pin Plunger Solder 3 A @ 250 V ac SPDT - 0.49 N -25°C +85°C - Silver Nickel Alloy - 5 x 10^5Operations 0.074N -25 → +85°C
RS Stock No. 173-9112
Mfr. Part No.AH1682A
BrandPanasonic
TWD48.40
Each (In a Tube of 50)
units
Hinge Lever Solder 1 A @ 30 V dc SPDT - 0.25 N -25°C +85°C - Silver Nickel Alloy - 10^6Operations 0.025N -25 → +85°C
RS Stock No. 699-4358
Mfr. Part No.AV32043
BrandPanasonic
TWD36.00
Each
units
Roller Lever Solder 3 A @ 250 V ac SPDT - 0.98 N -25°C +85°C - Silver Nickel Alloy - 5 x 10^5Operations 0.15N -25 → +85°C
RS Stock No. 173-8350
Mfr. Part No.AVT32023
BrandPanasonic
TWD36.60
Each (In a Box of 100)
units
Pin Plunger Solder 3 A @ 250 V ac SPDT - 0.49 N -25°C +85°C - Silver Nickel Alloy - 5 x 10^5Operations 0.074N -25 → +85°C
RS Stock No. 173-8351
Mfr. Part No.AVT3204
BrandPanasonic
TWD41.90
Each (In a Box of 100)
units
Pin Plunger Solder 3 A @ 250 V ac SPDT - 0.98 N -25°C +85°C - Silver Nickel Alloy - 5 x 10^5Operations 0.15N -25 → +85°C
RS Stock No. 173-8482
Mfr. Part No.AV32043
BrandPanasonic
TWD45.00
Each (In a Box of 100)
units
Roller Lever Solder 3 A @ 250 V ac SPDT - 0.98 N -25°C +85°C - Silver Nickel Alloy - 5 x 10^5Operations 0.15N -25 → +85°C
RS Stock No. 699-0574
Mfr. Part No.AVT34223
BrandPanasonic
TWD51.00
Each
units
Hinge Lever PCB 3 A @ 250 V ac SPDT - 0.12 N -25°C +85°C - Silver Nickel Alloy - 5 x 10^5Operations 0.012N -25 → +85°C
RS Stock No. 699-0460
Mfr. Part No.AVT3204
BrandPanasonic
TWD45.00
Each
units
Pin Plunger Solder 3 A @ 250 V ac SPDT - 0.98 N -25°C +85°C - Silver Nickel Alloy - 5 x 10^5Operations 0.15N -25 → +85°C
RS Stock No. 401-6829
Mfr. Part No.ESE11MV1
BrandPanasonic
TWD22.00
Each (In a Pack of 5)
units
Plunger - 10 mA @ 5 V dc SPST-NO - - -10°C +70°C - - - - - -10 → +70°C
RS Stock No. 173-8297
Mfr. Part No.ASQ10338
BrandPanasonic
TWD177.90
Each (In a Box of 100)
units
Simulated Roller Lever Pre-wired 100 mA @ 30 V dc SPST-NO IP67 1.5 N -40°C +85°C - Gold Plated - - - -40 → +85°C
RS Stock No. 698-9741
Mfr. Part No.ABS141641
BrandPanasonic
TWD189.00
Each
units
Roller Lever Solder 100 mA @ 30 V dc SPDT IP50 0.39 N -40°C +85°C - Triple Clad Gold - 5 x 10^6Operations 0.034N -40 → +85°C
RS Stock No. 698-9909
Mfr. Part No.ABS161840
BrandPanasonic
TWD302.00
Each
units
Leaf Lever Pre-wired 2 A @ 30 V dc SPDT IP67 0.88 N -40°C +85°C - Silver Nickel Alloy - 5 x 10^5Operations 0.17N -40 → +85°C
RS Stock No. 173-8307
Mfr. Part No.ASQ10817
BrandPanasonic
TWD73.00
Each (In a Box of 100)
units
Leaf Lever Left Angle PCB 100 mA @ 30 V dc SPDT-NO/NC IP67 1.7 N -40°C +85°C - Gold Plated - - - -40 → +85°C
RS Stock No. 173-8298
Mfr. Part No.ASQ10410
BrandPanasonic
TWD68.30
Each (In a Box of 100)
units
Pin Plunger Solder 100 mA @ 30 V dc SPDT IP67 1.5 N -40°C +85°C - Gold Plated - - - -40 → +85°C
RS Stock No. 173-8308
Mfr. Part No.ASQ11510
BrandPanasonic
TWD103.70
Each (In a Box of 100)
units
Pin Plunger PCB 100 mA @ 30 V dc SPDT IP67 1.5 N -40°C +85°C - Gold Plated - - - -40 → +85°C
RS Stock No. 699-4582
Mfr. Part No.AVL324561
BrandPanasonic
TWD80.00
Each
units
Simulated Roller Lever Solder 100 mA @ 30 V dc SPDT IP40 0.54 N -25°C +85°C - Triple Clad Gold - 10^7Operations 0.034N -25 → +85°C
RS Stock No. 173-8299
Mfr. Part No.ASQ10417
BrandPanasonic
TWD105.40
Each (In a Box of 100)
units
Leaf Lever Solder 100 mA @ 30 V dc SPDT IP67 1.7 N -40°C +85°C - Gold Plated - - - -40 → +85°C