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. 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. 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. 699-0574
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. 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. 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. 173-8482
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. 699-0445
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. 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. 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. 173-8371
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. 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. 699-4459
Mfr. Part No.AV3834613
BrandPanasonic
TWD63.00
Each
units
Long Hinge Lever Tab 100 mA @ 30 V dc SPDT - 0.25 N -25°C +85°C - Triple Clad Gold - 5 x 10^5Operations 0.025N -25 → +85°C
RS Stock No. 173-8471
Mfr. Part No.AVL34153
BrandPanasonic
TWD55.20
Each (In a Box of 100)
units
Short Hinge Lever PCB 5 A @ 250 V ac SPDT - 0.59 N -25°C +85°C - Silver Nickel Alloy - 10^7Operations 0.039N -25 → +85°C
RS Stock No. 699-0479
Mfr. Part No.AVT32143
BrandPanasonic
TWD57.00
Each
units
Short Hinge Lever Solder 3 A @ 250 V ac SPDT - 0.39 N -25°C +85°C - Silver Nickel Alloy - 5 x 10^5Operations 0.034N -25 → +85°C
RS Stock No. 173-8362
Mfr. Part No.AVT324261
BrandPanasonic
TWD53.40
Each (In a Box of 100)
units
Simulated Roller Lever Solder 100 mA @ 30 V dc SPDT IP40 0.16 N -25°C +85°C - Triple Clad Gold - 5 x 10^5Operations 0.015N -25 → +85°C
RS Stock No. 699-0482
Mfr. Part No.AVT3220613
BrandPanasonic
TWD65.00
Each
units
Short Hinge Lever Solder 100 mA @ 30 V dc SPDT - 0.078 N -25°C +85°C - Triple Clad Gold - 5 x 10^5Operations 0.003N -25 → +85°C
RS Stock No. 173-8476
Mfr. Part No.AVT3402
BrandPanasonic
TWD41.90
Each (In a Box of 100)
units
Pin Plunger PCB 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. 698-9748
Mfr. Part No.ABS141651
BrandPanasonic
TWD175.00
Each
units
Roller Lever Solder 100 mA @ 30 V dc SPDT IP50 0.59 N -40°C +85°C - Triple Clad Gold - 5 x 10^6Operations 0.039N -40 → +85°C
RS Stock No. 699-4490
Mfr. Part No.AV442461
BrandPanasonic
TWD76.00
Each
units
Hinge Lever PCB 100 mA @ 30 V dc SPDT - 0.25 N -25°C +80°C - Gold Plated - 3 x 10^5Operations - -25 → +80°C