Limit Switches

Limit switches are a contact proximity sensor device that consists of an actuator mechanically linked to a set of output contacts. When an object comes into contact with the actuator, the device operates the contacts to make or break an electrical connection.

Limit Switch Makeup

Limit switches are made up of three key components:
•Actuator Head - The actuator is the part of the switch that makes physical contact with the object. In some limit switches, the actuator is attached to an operating head which translates a rotary, linear, or perpendicular motion to open or close the electrical contacts of the switch.


•Switch Body – The switch body is the component containing the electrical contact mechanism, the contacts within the body open or close the electrical circuit when the actuator is activated.


•Receptacle/Terminals - The component containing the terminal screws or screw/clamp assembly necessary for wiring purposes.



Actuator Types

Limit switches are available with a wide range of actuator types. The type of actuator used can be determined by the mounting position, force required and objects to be detected.
•Rotary Lever - with lever actuators, a cam or plate hits the end of the lever arm which in turn rotates a shaft and operates the contacts in the switch. The rotation may be spring returned (momentary) or maintained.


•Plunger - Plunger types are best where short controlled machine movements are present or where mounting space does not permit a lever type.


•Cat Whisker or Coil Spring – Longer actuators with a coil wire that can be moved/bent in multiple directions. Typically used in conveying applications to count objects as they pass by.


•Forked – Used with maintained contacts, consisting of two roller levers. One roller will trip the switch and when the second is moved to the opposite direction it will reset the switch.

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Description Price Actuator Type Pole and Throw Configuration Normal State Configuration IP Rating Maximum Current Housing Material Maximum AC Voltage Maximum DC Voltage Connection Type Contact Type Series Terminal Type Length Width
RS Stock No. 323-9295
Mfr. Part No.83840701
BrandCrouzet
PHP8,717.76
Each
units
- - - - - - - - - - - - - -
RS Stock No. 323-9302
Mfr. Part No.83841701
BrandCrouzet
PHP6,248.65
Each
units
- - - - - - - - - - - - - -
RS Stock No. 539-230
Mfr. Part No.83118007
BrandCrouzet
PHP3,032.42
Each
units
Lever SP NO/NC - 17.5 A Plastic 250V - Screw - - - 29.4mm 43mm
RS Stock No. 323-9239
Mfr. Part No.83 581 001
BrandCrouzet
PHP2,344.65
Each
units
- - - - - - - - - - - - - -
RS Stock No. 323-9318
Mfr. Part No.83843701
BrandCrouzet
PHP7,130.97
Each
units
- - - - - - - - - - - - - -
RS Stock No. 539-236
Mfr. Part No.83139103
BrandCrouzet
PHP2,580.87
Each
units
Plunger SPDT - - - - - - - - - Wire Lead - -
RS Stock No. 539-208
Mfr. Part No.83732329
BrandCrouzet
PHP3,970.09
Each
units
Plunger SP NO/NC IP56 5 A - 250V - Cable - - Wire Lead 49.5mm 49mm
RS Stock No. 174-6189
Mfr. Part No.83-733-327
BrandCrouzet
PHP5,467.80
Each
units
Plunger SP NO/NC IP56 5 A Metal 250V - Cable Single Break - - 46.5mm 22mm
RS Stock No. 539-325
Mfr. Part No.83872301
BrandCrouzet
PHP5,114.25
Each
units
Plunger - NO/NC IP66, IP67 100 mA Metal 30V 30V Cable Snap Action - - 49mm 30mm
RS Stock No. 539-319
Mfr. Part No.83106022
BrandCrouzet
PHP1,792.47
Each
units
Plunger SPDT NO/NC - 17.5 A Polyamide 250V - - - - Quick Connect 19mm 32mm
RS Stock No. 539-214
Mfr. Part No.83874101
BrandCrouzet
PHP4,043.20
Each
units
Plunger - NO/NC IP66, IP67 6 A Metal 240V 125V Cable Snap Action - - 74.8mm 30mm
RS Stock No. 539-246
Mfr. Part No.83870301
BrandCrouzet
PHP4,410.89
Each
units
Plunger - NO/NC IP66, IP67 100 mA Metal 30V 30V Cable Snap Action - - 59.8mm 30mm
RS Stock No. 539-270
Mfr. Part No.83873301
BrandCrouzet
PHP4,849.26
Each
units
Lever - NO/NC IP66, IP67 100 mA Metal 30V 30V Cable Snap Action - - 85.6mm 30mm
RS Stock No. 323-9324
Mfr. Part No.83845701
BrandCrouzet
PHP9,032.62
Each
units
- - - - - - - - - - - - - -
RS Stock No. 539-274
Mfr. Part No.83106030
BrandCrouzet
PHP998.32
Each
units
Plunger SPDT NO/NC - 17.5 A Polyamide 250V - - - - Solder Tag 19mm 32mm
RS Stock No. 539-296
Mfr. Part No.83733327
BrandCrouzet
PHP3,337.48
Each
units
Plunger SP NO/NC IP56 5 A - 250V - Cable - - Wire Lead 36mm 49mm
RS Stock No. 539-347
Mfr. Part No.83151012
BrandCrouzet
PHP19,986.82
Each
units
Plunger SP NO/NC - - - - - - - - Solder Tag - -
RS Stock No. 539-343
Mfr. Part No.83871101
BrandCrouzet
PHP4,083.66
Each
units
Plunger - NO/NC IP66, IP67 6 A Metal 240V 125V Cable Snap Action - - 69.9mm 30mm
RS Stock No. 539-315
Mfr. Part No.83731324
BrandCrouzet
PHP3,675.51
Each
units
Plunger SP NO/NC IP66 5 A - 250V - Cable - - Wire Lead 49.5mm 49mm
RS Stock No. 539-286
Mfr. Part No.83870101
BrandCrouzet
PHP3,827.46
Each
units
Plunger - NO/NC IP66, IP67 6 A Metal 240V 125V Cable Snap Action - - 69.9mm 30mm