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. 472-8112
Mfr. Part No.XCG5-S1-Z1
$6.86
Each
units
Roller Lever Tab 5 A @ 250 V ac - - 0.69 N - - - Gold; Silver - - 0.09N -
RS Stock No. 173-9385
Mfr. Part No.XCG5-S1-Z1
$3.366
Each (In a Bag of 200)
units
Roller Lever Tab 5 A @ 250 V ac - - 0.69 N - - - Gold; Silver - - 0.09N -
RS Stock No. 472-8207
Mfr. Part No.XGG2-88Z1
$6.64
Each
units
Button Tab 16 A @ 250 V ac SPDT-NO/NC IP40 3.2 N -40°C +85°C - Fine Silver; Silver Nickel Melamine Formaldehyd Thermosetting 50000000Operations 0.4N -40 → +85°C
RS Stock No. 414-5646
Mfr. Part No.4BR
$109.23
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. 173-9367
Mfr. Part No.01710
$73.899
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. 173-9373
Mfr. Part No.44710
$13.326
Each (In a Bag of 20)
units
Plunger Pre-wired 5 A @ 250 V ac SP-NO/NC IP6K7 2.5 N -40°C +85°C - Fine Silver Glass Fibre Reinforced PA 10^5Operations 0.5N -40 → +85°C
RS Stock No. 456-4637
Mfr. Part No.V4LS
$24.26
Each
units
Plunger Pre-wired 5 A @ 250 V ac SP-NO/NC IP6K7 2.5 N -40°C +85°C - Fine Silver Glass Fibre Reinforced PA 10^5Operations 0.5N -40 → +85°C
RS Stock No. 173-9300
Mfr. Part No.V3S-UL
$29.877
Each (In a Bag of 50)
units
Plunger Pre-wired 5 A @ 250 V ac SP-NO/NC IP67 3.9 N -40°C +85°C - Silver Glass Fibre Reinforced Nylon 10^6Operations 1.1N -40 → +85°C
RS Stock No. 317-998
Mfr. Part No.V3S-UL
$38.26
Each
units
Plunger Pre-wired 5 A @ 250 V ac SP-NO/NC IP67 3.9 N -40°C +85°C - Silver Glass Fibre Reinforced Nylon 10^6Operations 1.1N -40 → +85°C
RS Stock No. 414-5652
Mfr. Part No.4BRSH
$124.36
Each
units
Plunger Pre-wired 15 A @ 250 V ac SPDT IP67 7.2 N -40°C +85°C - Silver Zinc Alloy 1000000Operations 1.7N -40 → +85°C
RS Stock No. 173-9368
Mfr. Part No.4BRSH
$89.218
Each (In a Bag of 25)
units
Plunger Pre-wired 15 A @ 250 V ac SPDT IP67 7.2 N -40°C +85°C - Silver Zinc Alloy 1000000Operations 1.7N -40 → +85°C
RS Stock No. 472-8263
Mfr. Part No.XGG2-88-S21Z1
$11.44
Each
units
Roller Lever Tab 15 A @ 250 V ac - - 1.54 N - - - Gold; Silver - - 0.18N -
RS Stock No. 173-9386
Mfr. Part No.XCG8-S1-Z1
$2.397
Each (In a Bag of 200)
units
Roller Lever PCB 6 A @ 250 V ac NO/NC IP40 0.7 N -40°C +85°C - Silver Phenolic Melamine 5 x 10^7Operations 0.09N -40 → +85°C
RS Stock No. 472-8055
Mfr. Part No.XCG3-Z1
$6.60
Each
units
Plunger Solder 5 A @ 250 V ac - - 1.69 N - - - Silver - - 0.3N -
RS Stock No. 173-9302
Mfr. Part No.V3SYR-UL
$33.576
Each (In a Bag of 50)
units
Short Roller Lever Pre-wired 5 A @ 250 V ac SP-NO/NC IP67 3.9 N -40°C +85°C - Silver Glass Fibre Reinforced Nylon 10^6Operations 0.4N -40 → +85°C
RS Stock No. 472-8140
Mfr. Part No.XCG8-S1-Z1
$7.53
Each
units
Roller Lever PCB 6 A @ 250 V ac NO/NC IP40 0.7 N -40°C +85°C - Silver Phenolic Melamine 5 x 10^7Operations 0.09N -40 → +85°C
RS Stock No. 173-9381
Mfr. Part No.XCG3-Z1
$1.53
Each (In a Bag of 200)
units
Plunger Solder 5 A @ 250 V ac - - 1.69 N - - - Silver - - 0.3N -
RS Stock No. 318-014
Mfr. Part No.V3SYR-UL
$56.79
Each
units
Short Roller Lever Pre-wired 5 A @ 250 V ac SP-NO/NC IP67 3.9 N -40°C +85°C - Silver Glass Fibre Reinforced Nylon 10^6Operations 0.4N -40 → +85°C
RS Stock No. 472-8314
Mfr. Part No.V4NST7Y1UL
$11.23
Each
units
Short Lever Solder 5 A @ 250 V ac SPDT-NO/NC IP67 0.9 N -40°C +85°C - Fine Silver Glass Fibre Reinforced Nylon 5000000Operations 0.07N -40 → +85°C
RS Stock No. 173-9393
Mfr. Part No.V4NST7Y1UL
$3.606
Each (In a Bag of 50)
units
Short Lever Solder 5 A @ 250 V ac SPDT-NO/NC IP67 0.9 N -40°C +85°C - Fine Silver Glass Fibre Reinforced Nylon 5000000Operations 0.07N -40 → +85°C