Safety Limit Switches

Limit switches operate with the movement of machinery, opening or closing the circuit when movement is detected. Safety limit switches provide a level of risk reduction over regular limit switches, as they have a positive actuation structure, which means that if a fault occurs they will stop conducting the electrical load.

What are safety limit switches used for?

Safety limit switches are used in industrial settings to reduce the risk factor in the event of overcurrent or electrical faults. This can be useful in a wide range of applications, from heating and ventilation to the operation of heavy machinery, where normal limit switches might provide a risk if they continued to conduct electricity in the event of a fault.

Types of safety limit switches

Safety limit switches mainly differ by the type of actuator they have. This can be a hinge, roller, rod or push bolt, for example.They can also vary by the number of contacts and cable entries that they have.


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Description Price Actuator Type Actuator Included Normal State Configuration Action Type IP Rating Connection Type Housing Material Number of Cable Entries Number of Contacts Size of Cable Entries Pole and Throw Configuration Series Depth Dimensions
RS stock no. 498-892
Mfr. Part No.3SE5250-0LC05
BrandSiemens
R 265.00
Each
units
Plunger Yes 2NC/1NO Snap IP10 Screw Plastic - 3 - - 3SE5 27.8mm 59.2 x 30 x 27.8 mm
RS stock no. 749-7631
Mfr. Part No.3SE5122-0CE01
BrandSiemens
R 617.00
Each
units
Roller Lever Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.8mm 85.7 x 56 x 37.8 mm
RS stock no. 411-3021
Mfr. Part No.3SE2243-0XX40
BrandSiemens
R 533.00
Each
units
- - NO/NC Slow IP65 Screw Fibreglass 3 3 M20 x 1.5 - 3SE5 30mm 90 x 52 x 30 mm
RS stock no. 749-7650
Mfr. Part No.3SE5232-0HD03
BrandSiemens
R 323.00
Each
units
Roller Plunger Yes NO/NC - IP65 Screw Plastic - - - DPST 3SE5 33mm 75.7 x 31 x 33 mm
RS stock no. 749-7634
Mfr. Part No.3SE5122-0CF01
BrandSiemens
R 617.00
Each
units
Roller Lever Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.8mm 85.7 x 56 x 37.8 mm
RS stock no. 749-7688
Mfr. Part No.3SE5234-0HD03-1AC4
BrandSiemens
R 524.00
Each
units
Roller Plunger Yes NO/NC - IP65 M12 Plastic - - - 4PST 3SE5 33mm 75.7 x 31 x 33 mm
RS stock no. 749-7577
Mfr. Part No.3SE5112-0BH01
BrandSiemens
R 708.00
Each
units
Twist Lever Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS stock no. 768-6544
Mfr. Part No.3SE5112-0KA00-1AJ0
BrandSiemens
R 598.00
Each
units
Round Plunger - NO/NC Slow - Screw Metal 1 3 M20 x 1.5 - 3SE5 78mm 40.5 x 37.3 x 78 mm
RS stock no. 769-6245
Mfr. Part No.3SE5212-0CD03
BrandSiemens
R 418.00
Each
units
Roller Plunger Yes NO/NC Snap - Screw Metal 1 2 M20 x 1.5 - 3SE5 68mm 31 x 33 x 68 mm
RS stock no. 749-7599
Mfr. Part No.3SE5112-0CH50
BrandSiemens
R 731.00
Each
units
Twist Lever Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS stock no. 749-7697
Mfr. Part No.3SE5250-0CC05
BrandSiemens
R 265.00
Each
units
Plunger Yes NO/NC - IP20 Screw Plastic - - - DPST 3SE5 27.8mm 42.5 x 30 x 27.8 mm
RS stock no. 769-6273
Mfr. Part No.3SE5132-0CJ01
BrandSiemens
R 510.00
Each
units
Twist Lever Yes NO/NC Snap - Screw Plastic 1 2 M20 x 1.5 - 3SE5 78mm 40.5 x 37.3 x 78 mm
RS stock no. 769-6241
Mfr. Part No.3SE5162-0CH01
BrandSiemens
R 1,420.00
Each
units
Twist Lever Yes 2NO/2NC Snap - Screw Metal 3 4 M20 x 1.5 - 3SE5 100mm 56 x 37 x 100 mm
RS stock no. 749-7580
Mfr. Part No.3SE5112-0CC02
BrandSiemens
R 645.00
Each
units
Plunger Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS stock no. 769-6248
Mfr. Part No.3SE5162-0CD02
BrandSiemens
R 1,430.00
Each
units
Roller Plunger Yes 2NO/2NC Snap - Screw Metal 3 4 M20 x 1.5 - 3SE5 100mm 56 x 37 x 100 mm
RS stock no. 768-6500
Mfr. Part No.3SE5122-0MA00
BrandSiemens
R 417.00
Each
units
Round Plunger - NO/2NC Slow - Screw Metal 3 3 M20 x 1.5 - 3SE5 78mm 56 x 37.8 x 78 mm
RS stock no. 768-6503
Mfr. Part No.3SE5122-0PA00
BrandSiemens
R 417.00
Each
units
Round Plunger - 2NO/NC Slow - Screw Metal 3 3 M20 x 1.5 - 3SE5 78mm 56 x 37.8 x 78 mm
RS stock no. 498-965
Mfr. Part No.3SE5232-0CC05
BrandSiemens
R 253.00
Each
units
Plunger Yes NO/NC Snap IP65 Screw Plastic 1 2 M20 x 1.5 - 3SE5 33mm 75.7 x 31 x 33 mm
RS stock no. 749-7606
Mfr. Part No.3SE5112-0LA00
BrandSiemens
R 417.00
Each
units
- - NO/2NC - IP66, IP67 Screw Metal - - - 3PST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS stock no. 769-6223
Mfr. Part No.3SE5242-0HE10
BrandSiemens
R 440.00
Each
units
Roller Lever Yes NO/NC Snap - Screw Plastic 2 2 M20 x 1.5 - 3SE5 53mm 50 x 33 x 53 mm