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 Series Contact Type Terminal Type Length Width
New
RS Stock No. 189-5296
Mfr. Part No.6083000268
£22.31
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw I81 Slow Action, Snap Action - 31mm 122.5mm
New
RS Stock No. 189-5291
Mfr. Part No.6083000236
£20.77
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw IN65 Slow Action, Snap Action - 31mm 108mm
New
RS Stock No. 189-5297
Mfr. Part No.6083000269
£20.77
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw I81 Slow Action, Snap Action - 31mm 119.5mm
New
RS Stock No. 189-5292
Mfr. Part No.6083000242
£20.00
Each
Units
Plunger DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw I81 Slow Action, Snap Action - 31mm 89.5mm
New
RS Stock No. 189-5298
Mfr. Part No.6083000246
£23.85
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw I81 Slow Action, Snap Action - 31mm 123.5mm
New
RS Stock No. 189-5284
Mfr. Part No.6083000228
£20.00
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw IN65 Slow Action, Snap Action - 31mm 105.5mm
New
RS Stock No. 189-5286
Mfr. Part No.6083000254
£20.00
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw IN65 Slow Action, Snap Action - 31mm 105.5mm
New
RS Stock No. 189-5270
Mfr. Part No.6088803005
£17.38
Each
Units
Plunger DPST 2NO IP65 10 A Glass Fibre Reinforced Thermoplastic 240V - Screw TI2 Slow Action, Snap Action - 30mm 57mm
New
RS Stock No. 189-5275
Mfr. Part No.6083000202
£13.08
Each
Units
Plunger DPST 2NC IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw IN62 Slow Action, Snap Action - 31mm 74mm
New
RS Stock No. 189-5293
Mfr. Part No.6083000243
£22.31
Each
Units
Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw I81 Slow Action, Snap Action - 31mm 101mm
New
RS Stock No. 189-5288
Mfr. Part No.6083000261
£18.46
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw IN65 Slow Action, Snap Action - 31mm 101.5mm
New
RS Stock No. 189-5272
Mfr. Part No.6088185022
£28.65
Each
Units
Lever, Roller DPST NC/NO IP65 10 A Glass Fibre Reinforced Thermoplastic 240V - Screw TI2 Slow Action, Snap Action - 30mm -
New
RS Stock No. 189-5277
Mfr. Part No.6083000205
£12.31
Each
Units
Plunger DPST 2NO IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw IN62 Slow Action, Snap Action - 31mm 74mm
New
RS Stock No. 189-5280
Mfr. Part No.6083000214
£20.00
Each
Units
Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw IN65 Slow Action, Snap Action - 31mm 74mm
New
RS Stock No. 189-5265
Mfr. Part No.6088171016
£23.38
Each
Units
Roller DPST NC/NO IP65 10 A Glass Fibre Reinforced Thermoplastic 240V 250V Screw TI2 Slow Action, Snap Action - 30mm 67mm
New
RS Stock No. 189-5295
Mfr. Part No.6083000245
£22.31
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw I81 Slow Action, Snap Action - 31mm 121mm
New
RS Stock No. 189-5290
Mfr. Part No.6083000235
£21.54
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw IN65 Slow Action, Snap Action - 31mm 108mm
New
RS Stock No. 189-5283
Mfr. Part No.6083000222
£18.46
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw IN65 Slow Action, Snap Action - 31mm 90mm
New
RS Stock No. 189-5285
Mfr. Part No.6083000229
£19.23
Each
Units
Lever, Roller DPST NC/NO IP66, IP67 5 A Glass Fibre Reinforced Thermoplastic 240V 24V Screw IN65 Slow Action, Snap Action - 31mm 105.5mm
New
RS Stock No. 189-5269
Mfr. Part No.6088817009
£21.54
Each
Units
Roller DPST 2NC IP65 10 A Glass Fibre Reinforced Thermoplastic 240V 240V Screw TI2 Slow Action, Snap Action - 30mm 63.3mm