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 749-7640
製造零件編號3SE5162-0CE01
BrandSiemens
HK$1,316.91
單位
Roller Lever 4PST 2NO/2NC IP66, IP67 6 A Metal - - Screw - 3SE5 Screw 107.7mm 56mm
RS庫存編號 749-7669
製造零件編號3SE5232-0HE10
BrandSiemens
HK$345.73
單位
Roller Lever DPST NO/NC IP65 - Plastic - - Screw - 3SE5 - 75.7mm 31mm
RS庫存編號 749-7650
製造零件編號3SE5232-0HD03
BrandSiemens
HK$302.12
單位
Roller Plunger DPST 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
HK$691.88
單位
Plunger DPST NO/NC IP66, IP67 6 A Metal - - Screw - 3SE5 Screw 85.7mm 40.5mm
RS庫存編號 749-7599
製造零件編號3SE5112-0CH50
BrandSiemens
HK$684.19
單位
Twist Lever DPST NO/NC IP66, IP67 6 A Metal - - Screw - 3SE5 Screw 85.7mm 40.5mm
RS庫存編號 768-6538
製造零件編號3SE5162-0CA00
BrandSiemens
HK$1,073.22
單位
Round Plunger - 2NO/2NC - - Metal - - Screw - 3SE5 - 56mm 37mm
RS庫存編號 684-2908
製造零件編號3SE5112-0CH01
BrandSiemens
HK$497.49
單位
Roller Lever - NO/NC IP66, IP67 6 A @ 24 V Metal 400V 400V Snap-On Snap Action - Screw 119.5mm 37.3mm
RS庫存編號 749-7666
製造零件編號3SE5232-0HK21
BrandSiemens
HK$356.11
單位
Twist Lever DPST NO/NC IP65 6 A Plastic - - Screw - 3SE5 Screw 75.7mm 31mm
RS庫存編號 749-7647
製造零件編號3SE5132-0BA00
BrandSiemens
HK$292.21
單位
- DPST NO/NC IP66, IP67 6 A Plastic - - Screw - 3SE5 Screw 85.7mm 40.5mm
RS庫存編號 768-6456
製造零件編號3SE5214-0LC05-1AE1
BrandSiemens
HK$379.18
單位
Round Plunger - 2NC - - Metal - - Screw - 3SE5 - 31mm 33mm
RS庫存編號 749-7631
製造零件編號3SE5122-0CE01
BrandSiemens
HK$443.21
單位
Roller Lever DPST NO/NC IP66, IP67 6 A Metal - - Screw - 3SE5 Screw 85.7mm 56mm
RS庫存編號 749-7675
製造零件編號3SE5232-0HK60
BrandSiemens
HK$453.35
單位
Twist Lever DPST NO/NC IP65 6 A Plastic - - Screw - 3SE5 Screw 75.7mm 31mm
RS庫存編號 749-7701
製造零件編號3SE5423-0CC20-1EA2
BrandSiemens
HK$723.00
單位
Plunger DPST NO/NC IP67 6 A Metal - - M12 - 3SE5 M12 Connector 50mm 40mm
RS庫存編號 202-1664
製造零件編號3SE5132-0QV20
BrandSiemens
HK$595.16
單位
Rotary - NO/NC - - Metal - - - - SIRIUS - - -
全新
RS庫存編號 216-3334
製造零件編號3SE5232-0KK21
BrandSiemens
HK$405.01
單位
Roller - 1NO/2NC IP65 4 A Plastic 400V - - - - - - -
RS庫存編號 749-7577
製造零件編號3SE5112-0BH01
BrandSiemens
HK$684.33
單位
Twist Lever DPST NO/NC IP66, IP67 6 A Metal - - Screw - 3SE5 Screw 85.7mm 40.5mm
全新
RS庫存編號 213-1269
製造零件編號3SE5122-0PE01
BrandSiemens
HK$633.83
單位
Roller - 2NO/1NC IP66, IP67 4 A Metal 250V - - - - - - -
全新
RS庫存編號 213-1255
製造零件編號3SE5114-0LA00-1AE1
BrandSiemens
HK$612.35
單位
Plunger 5P 1NO/2NC IP66, IP67 4 A Metal 125V - - - - - - -
RS庫存編號 749-7707
製造零件編號3SE5413-0CD20-1EA5
BrandSiemens
HK$778.86
單位
Roller Plunger DPST NO/NC IP67 6 A Metal - - M12 - 3SE5 M12 Connector 50mm 30mm
RS庫存編號 749-7678
製造零件編號3SE5232-0HR01
BrandSiemens
HK$458.72
單位
Spring Rod DPST NO/NC IP65 6 A Plastic - - Screw - 3SE5 Screw 75.7mm 31mm