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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Nombre de résultats par page
Description Prix 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
N° de stock RS 684-2908
Référence fabricant3SE5112-0CH01
MarqueSiemens
54,99 €
Each
Unité
Roller Lever - NO/NC IP66, IP67 6 A @ 24 V Metal 400V 400V Snap-On Snap Action - Screw 119.5mm 37.3mm
Nouveau
N° de stock RS 203-3961
Référence fabricant3SE5122-0CR01
MarqueSiemens
55,10 €
Each
Unité
Spring Rod - 1 NO/1 NC IP65/IP67 6 A Metal 400V - - Snap Action - - - -
Nouveau
N° de stock RS 203-3997
Référence fabricant3SE5112-0BD02
MarqueSiemens
66,10 €
Each
Unité
Roller Plunger - 1 NO/1 NC IP66/IP67 6 A Metal 400V - - - - - - -
Nouveau
N° de stock RS 203-3867
Référence fabricant3SE5114-0CH01-1AC5
MarqueSiemens
88,00 €
Each
Unité
Rotary - 1 NO/1 NC IP66/IP67 4 A Metal 125V - - Snap Action - - - -
N° de stock RS 684-2910
Référence fabricant3SE5112-0CE01
MarqueSiemens
48,96 €
Each
Unité
Roller Lever - NO/NC IP66, IP67 6 A @ 24 V Metal 400V 400V Snap-On Snap Action - Screw 119mm 37.3mm
Nouveau
N° de stock RS 203-3940
Référence fabricant3SE5232-0LK50
MarqueSiemens
41,50 €
Each
Unité
Roller - 1 NO/2 NC IP65 6 A Plastic 400V - - Snap Action - - - -
Nouveau
N° de stock RS 203-3873
Référence fabricant3SE5114-0CD02-1AL0
MarqueSiemens
94,40 €
Each
Unité
Roller Plunger - 1 NO/1 NC IP66/IP67 4 A Metal 125V - - Snap Action - - - -
Nouveau
N° de stock RS 203-3913
Référence fabricant3SE5232-0LC05-1CA0
MarqueSiemens
29,00 €
Each
Unité
Plunger - 1 NO/2 NC IP65 6 A Plastic 400V - - Snap Action - - - -
Nouveau
N° de stock RS 203-3874
Référence fabricant3SE5242-0CC05
MarqueSiemens
29,00 €
Each
Unité
Plunger - 1 NO/1 NC IP66/IP67 6 A Plastic 400V - - Snap Action - - - -
Nouveau
N° de stock RS 203-3887
Référence fabricant3SE5232-0LK21
MarqueSiemens
36,30 €
Each
Unité
Roller - 1 NO/2 NC IP65 6 A Plastic 400V - - Snap Action - - - -
Nouveau
N° de stock RS 203-3857
Référence fabricant3SE5112-0CT11
MarqueSiemens
103,00 €
Each
Unité
Roller - 1 NO/1 NC IP66/IP67 6 A Metal 400V - - Snap Action - - - -
Nouveau
N° de stock RS 203-3912
Référence fabricant3SE5112-0CH02
MarqueSiemens
72,80 €
Each
Unité
Rotary - 1 NO/1 NC IP66/IP67 6 A Metal 400V - - Snap Action - - - -
Nouveau
N° de stock RS 203-3885
Référence fabricant3SE5112-1LA00
MarqueSiemens
58,00 €
Each
Unité
Basic Switch DPDT 1 NO/2 NC IP66/IP67 10 A Metal 400V - - Snap Action - - - -
Nouveau
N° de stock RS 203-3989
Référence fabricant3SE5122-0LE01
MarqueSiemens
57,50 €
Each
Unité
Roller - 1 NO/2 NC IP66/IP67 6 A Metal 400V - - Snap Action - - - -
Nouveau
N° de stock RS 203-4000
Référence fabricant3SE5232-0CE12-1CA0
MarqueSiemens
42,80 €
Each
Unité
Roller - 1 NO/1 NC IP65 6 A Plastic 400V - - Snap Action - - - -
Nouveau
N° de stock RS 203-3868
Référence fabricant3SE5234-1LC05-1AD5
MarqueSiemens
119,00 €
Each
Unité
Rounded Plunger DPDT 1 NO/2 NC IP65 4 A Plastic 125V - - Snap Action - - - -
Nouveau
N° de stock RS 203-3960
Référence fabricant3SE5112-0LD02
MarqueSiemens
66,70 €
Each
Unité
Roller Plunger - 1 NO/2 NC IP66/IP67 6 A Metal 400V - - Snap Action - - - -
Nouveau
N° de stock RS 203-3886
Référence fabricant3SE5114-0CA00-1AC5
MarqueSiemens
58,80 €
Each
Unité
Basic Switch with Plug SPDT 1 NO/1 NC IP66/IP67 10 A Metal 400V - - Snap Action - - - -