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庫存編號 684-2910
製造零件編號3SE5112-0CE01
BrandSiemens
TWD2,477.00
單位
Roller Lever - NO/NC IP66, IP67 6 A @ 24 V Metal 400V 400V Snap-On Snap Action - Screw 119mm 37.3mm
RS庫存編號 227-977
製造零件編號3SE5232-0HC05
BrandSiemens
TWD907.00
單位
Plunger - NO/NC IP65 6 A Plastic - - Screw - 3SE5 Screw 75.7mm 31mm
RS庫存編號 749-7583
製造零件編號3SE5112-0CD02
BrandSiemens
TWD2,593.00
單位
Plunger DPST NO/NC IP66, IP67 6 A Metal - - Screw - 3SE5 Screw 85.7mm 40.5mm
RS庫存編號 749-7616
製造零件編號3SE5122-0BE01
BrandSiemens
TWD2,284.00
單位
Roller Lever DPST NO/NC IP66, IP67 6 A Metal - - Screw - 3SE5 Screw 85.7mm 56mm
RS庫存編號 749-7599
製造零件編號3SE5112-0CH50
BrandSiemens
TWD2,641.00
單位
Twist Lever DPST NO/NC IP66, IP67 6 A Metal - - Screw - 3SE5 Screw 85.7mm 40.5mm
RS庫存編號 749-7631
製造零件編號3SE5122-0CE01
BrandSiemens
TWD2,268.00
單位
Roller Lever DPST NO/NC IP66, IP67 6 A Metal - - Screw - 3SE5 Screw 85.7mm 56mm
RS庫存編號 768-6503
製造零件編號3SE5122-0PA00
BrandSiemens
TWD1,579.00
單位
Round Plunger - 2NO/NC - - Metal - - Screw - 3SE5 - 56mm 37.8mm
全新
RS庫存編號 213-1247
製造零件編號3SE5112-0CH60
BrandSiemens
TWD2,753.00
單位
Rotary - 1NO/1NC IP66, IP67 4 A Metal 400V - - - - - - -
RS庫存編號 749-7669
製造零件編號3SE5232-0HE10
BrandSiemens
TWD1,335.00
單位
Roller Lever DPST NO/NC IP65 - Plastic - - Screw - 3SE5 - 75.7mm 31mm
RS庫存編號 769-6251
製造零件編號3SE5212-0CK21
BrandSiemens
TWD1,715.00
單位
Twist Lever - NO/NC - - Metal - - Screw - 3SE5 - 31mm 33mm
RS庫存編號 749-7600
製造零件編號3SE5112-0LC02
BrandSiemens
TWD2,421.00
單位
Plunger 3PST NO/2NC IP66, IP67 6 A Metal - - Screw - 3SE5 Screw 85.7mm 40.5mm
全新
RS庫存編號 213-1248
製造零件編號3SE5112-0CH82
BrandSiemens
TWD2,882.00
單位
Rotary - 1NO/1NC IP65, IP67 4 A Metal 400V - - - - - - -
RS庫存編號 755-7907
製造零件編號3SE5423-0CD20-1EA2
BrandSiemens
TWD2,797.00
單位
Roller Plunger DPST NO/NC - - - - - Cable - 3SE5 - 50mm 40mm
RS庫存編號 769-6276
製造零件編號3SE5132-0CE05
BrandSiemens
TWD1,719.00
單位
Roller Lever - NO/NC - - Plastic - - Screw - 3SE5 - 40.5mm 37.3mm
RS庫存編號 749-7672
製造零件編號3SE5232-0KD03
BrandSiemens
TWD1,307.00
單位
Roller Plunger 3PST NO/2NC IP65 6 A Plastic - - Screw - 3SE5 Screw 75.7mm 31mm
RS庫存編號 749-7612
製造零件編號3SE5122-0BB01
BrandSiemens
TWD1,800.00
單位
Plunger DPST NO/NC IP66, IP67 6 A Metal - - Screw - 3SE5 Screw 85.7mm 56mm
RS庫存編號 498-965
製造零件編號3SE5232-0CC05
BrandSiemens
TWD910.00
單位
Plunger - NO/NC IP65 - Plastic - - Screw - 3SE5 - 75.7mm 31mm
RS庫存編號 769-6740
製造零件編號3SE5250-0BC05
BrandSiemens
TWD1,014.00
單位
Plunger - NO/NC - - Plastic - - Screw - 3SE5 - 30mm 20mm
全新
RS庫存編號 213-1264
製造零件編號3SE5122-0CE02
BrandSiemens
TWD2,721.00
單位
Roller - 1NO/1NC IP66, IP67 4 A Metal 400V - - - - - - -
RS庫存編號 203-3913
製造零件編號3SE5232-0LC05-1CA0
BrandSiemens
TWD1,194.00
單位
Plunger - 1 NO/2 NC IP65 6 A Plastic 400V - - Snap Action - - - -