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. 682-1493
Mfr. Part No.D2F-01F-T
BrandOmron
HK$14.544
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. 157-1036
Mfr. Part No.V4NS
HK$81.29
Each
units
Plunger Pre-wired 5 A @ 250 V ac SP-NO/NC IP67 2.5 N -10°C +85°C - Fine Silver Glass Fibre Reinforced Nylon 3 x 10^6Operations 0.3N -10 → +85°C
RS Stock No. 159-4590
Mfr. Part No.DB1C-A1LB
BrandZF
HK$18.94
Each
units
Short Lever Solder 6 A @ 250 V ac SPDT-NO/NC IP50 0.59 N -40°C +120°C - Gold; Silver Alloy - 15000000Operations - -40 → +120°C
RS Stock No. 616-0136
Mfr. Part No.D2F-01
BrandOmron
HK$7.09
Each (In a Pack of 5)
units
Pin Plunger PCB 100 mA @ 30 V dc SPDT-NO/NC IP40 1.47 N -25°C +65°C - Gold Alloy - 1000000Operations 0.2N -25 → +65°C
RS Stock No. 682-1519
Mfr. Part No.D2F-F
BrandOmron
HK$16.83
Each (In a Pack of 5)
units
Pin Plunger PCB 1 A @ 125 V ac SPDT-NO/NC IP40 0.74 N -25°C +65°C - Silver Alloy - 1000000Operations 0.05N -25 → +65°C
RS Stock No. 173-9367
Mfr. Part No.01710
HK$370.57
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. 414-5646
Mfr. Part No.4BR
HK$483.20
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. 173-9302
Mfr. Part No.V3SYR-UL
HK$148.24
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. 320-512
Mfr. Part No.DC1C-C3LC
BrandZF
HK$70.28
Each
units
Lever Through Hole 6 A @ 250 V ac SPDT-NO/NC IP6K7 0.69 N -40°C +105°C - Silver Alloy - 1000000Operations - -40 → +105°C
RS Stock No. 318-014
Mfr. Part No.V3SYR-UL
HK$158.08
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. 868-1900
Mfr. Part No.D443-R1RA-G2
BrandZF
HK$61.34
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. 159-4449
Mfr. Part No.D459-V3RD
BrandZF
HK$12.79
Each (In a Pack of 5)
units
Roller Lever Tab 16 A @ 250 V ac SPDT-NO/NC - 0.49 N -40°C +85°C - Silver Alloy - - - -40 → +85°C
RS Stock No. 682-2746
Mfr. Part No.V-152-1C25
BrandOmron
HK$30.41
Each
units
Hinge Lever Tab 15 A @ 250 V ac SPDT-NO/NC IP40 1.23 N -25°C +80°C - Silver Alloy - 50000000Operations 0.14N -25 → +80°C
RS Stock No. 515-690
Mfr. Part No.V15T16-EZ100A06
BrandHoneywell
HK$39.97
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. 320-528
Mfr. Part No.DC1C-C3RC
BrandZF
HK$61.21
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. 173-9397
Mfr. Part No.42394
HK$11.035
Each (In a Bag of 200)
units
Plunger Solder - SP-NO/NC IP40 1.4 N -40°C +85°C - Silver Glass Fibre Reinforced Nylon 5 x 10^6Operations 0.28N -40 → +85°C
RS Stock No. 472-8279
Mfr. Part No.V4NSUL
HK$60.95
Each
units
Plunger Pre-wired 3 A @ 250 V ac SPDT-NO/NC IP67 2.5 N -40°C +85°C - Fine Silver Glass Fibre Reinforced Nylon 5000000Operations 0.3N -40 → +85°C
RS Stock No. 157-1008
Mfr. Part No.42394
HK$28.02
Each
units
Plunger Solder - SP-NO/NC IP40 1.4 N -40°C +85°C - Silver Glass Fibre Reinforced Nylon 5 x 10^6Operations 0.28N -40 → +85°C
RS Stock No. 538-8787
Mfr. Part No.DG13-B1LA
BrandZF
HK$20.64
Each (In a Pack of 5)
units
Hinge Lever PCB 3 A @ 125 V ac SPDT-NO/NC - 0.44 N -25°C +85°C - Silver Alloy - 1000000Operations - -25 → +85°C
RS Stock No. 173-9390
Mfr. Part No.V4NSUL
HK$52.56
Each (In a Bag of 50)
units
Plunger Pre-wired 3 A @ 250 V ac SPDT-NO/NC IP67 2.5 N -40°C +85°C - Fine Silver Glass Fibre Reinforced Nylon 5000000Operations 0.3N -40 → +85°C
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