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. 868-1935
Mfr. Part No.D459-R1LD-G2
BrandZF
MYR25.88
Each
units
Straight Lever Quick Connect 15 A SPDT IP50 - -40°C +150°C - Silver Alloy Thermoplastic Polyester PET - - -40 → +150°C
RS Stock No. 686-7017
Mfr. Part No.VX-55-1A3
BrandOmron
MYR24.95
Each
units
Short Roller Lever Solder 5 A @ 250 V ac SPDT-NO/NC IP40 0.59 N -25°C +80°C - Silver Alloy - 50000000Operations 0.04N -25 → +80°C
RS Stock No. 319-4221
Mfr. Part No.D2MQ-1L
BrandOmron
MYR12.73
Each
units
Lever Through Hole 500 mA @ 30 V dc SPDT-NO/NC IP40 0.59 N -15°C +70°C - Silver Plated - 30000Operations 0.08N -15 → +70°C
RS Stock No. 159-4449
Mfr. Part No.D459-V3RD
BrandZF
MYR10.636
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. 842-6661
Mfr. Part No.BZ-2RQ18-A2
BrandHoneywell
MYR182.52
Each
units
Plunger Screw 15 A SPDT - 2.5 → 3.61 N -55°C +85°C - Silver Phenolic 20000000Operations 1.11N -55 → +85°C
RS Stock No. 472-8207
Mfr. Part No.XGG2-88Z1
MYR19.53
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. 842-6655
Mfr. Part No.BZ-2RQ181-A2
BrandHoneywell
MYR142.95
Each
units
Plunger Screw 15 A SPDT - 2.5 → 3.61 N -55°C +85°C - Silver Phenolic 20000000Operations 1.11N -55 → +85°C
RS Stock No. 616-0215
Mfr. Part No.D3V-16-1C5
BrandOmron
MYR6.75
Each
units
Pin Plunger Tab 16 A @ 250 V ac SPDT-NO/NC IP40 1.96 N -25°C +105°C - Silver Alloy - 10000000Operations 0.49N -25 → +105°C
RS Stock No. 616-0114
Mfr. Part No.D2F-L
BrandOmron
MYR8.992
Each (In a Pack of 5)
units
Hinge Lever PCB 3 A @ 125 V ac SPDT-NO/NC IP40 0.78 N -25°C +65°C - Silver Alloy - 1000000Operations 0.05N -25 → +65°C
RS Stock No. 842-6649
Mfr. Part No.BZ-2RQ172-A2
BrandHoneywell
MYR103.08
Each
units
Plunger Screw 1 A SPDT - 2.5 → 3.61 N -55°C +85°C - - Phenolic 20000000Operations 1.11N -55 → +85°C
RS Stock No. 686-7688
Mfr. Part No.D2F-01F-D
BrandOmron
MYR5.378
Each (In a Bag of 5)
units
Pin Plunger Solder 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. 616-0170
Mfr. Part No.D2MQ-1-TR
BrandOmron
MYR14.86
Each
units
Plunger Through Hole 500 mA @ 30 V dc SPDT-NO/NC IP40 1.18 N -15°C +70°C - Silver Plated - 30000Operations 0.19N -15 → +70°C
RS Stock No. 616-0287
Mfr. Part No.D2VW-5-1M
BrandOmron
MYR48.61
Each
units
Plunger Pre-wired 5 A @ 250 V ac SPDT-NO/NC IP67 1.96 N -40°C +85°C - Silver Alloy - 10000000Operations 0.29N -40 → +85°C
RS Stock No. 338-282
Mfr. Part No.BZ-2RW82-A2
BrandHoneywell
MYR64.78
Each
units
Roller Lever Screw 15 A @ 125 V ac SPDT-NO/NC - 0.97 N - - - - - - 0.21N -
RS Stock No. 682-2679
Mfr. Part No.SS-5GL-F
BrandOmron
MYR9.628
Each (In a Pack of 5)
units
Hinge Lever Solder 5 A @ 125 V ac SPDT-NO/NC IP40 0.16 N -25°C +85°C - Silver - 30000000Operations 0.02N -25 → +85°C
RS Stock No. 505-9192
Mfr. Part No.KMR231GLFS
BrandC & K
MYR1.96
Each (In a Pack of 10)
units
Tactile Through Hole 50 mA @ 32 V dc SPST-NO - 3 N -40°C +85°C - Silver - 150000Operations - -40 → +85°C
RS Stock No. 173-9362
Mfr. Part No.V3SYR1-UL
MYR95.556
Each (In a Bag of 50)
units
Roller Lever Pre-wired 5 A @ 250 V ac SP-NO/NC IP67 2.3 N -40°C +85°C - Silver Glass Fibre Reinforced Nylon 10^6Operations 0.42N -40 → +85°C
RS Stock No. 700-5728
Mfr. Part No.83240000
BrandCrouzet
MYR220.24
Each
units
Plunger Tab 6 A @ 250 V ac DT-NO/NC IP40 4.5 N -50°C +85°C - Silver Nickel Glass Fibre Reinforced PC 10^7Operations - -50 → +85°C
RS Stock No. 706-4171
Mfr. Part No.DH2C-C6PA
BrandZF
MYR13.40
Each
units
Lever Left Angle PCB 500 mA @ 30 V dc SPDT-NO/NC - 0.49 N -25°C +70°C - Gold Plated Brass - - - -25 → +70°C
RS Stock No. 807-3930
Mfr. Part No.SS-5GL13-T
BrandOmron
MYR9.90
Each
units
Simulated Roller Lever Solder Lug 5 A @ 125 V ac SPDT IP40 1.47 N -25°C +85°C - Silver - 30000000Operations 0.06N -25 → +85°C
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