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. 749-7583
Mfr. Part No.3SE5112-0CD02
BrandSiemens
TWD1,787.00
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. 227-977
Mfr. Part No.3SE5232-0HC05
BrandSiemens
TWD631.00
Each
units
Plunger - NO/NC - IP65 Screw Plastic - - - - 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 749-7631
Mfr. Part No.3SE5122-0CE01
BrandSiemens
TWD1,533.00
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. 749-7599
Mfr. Part No.3SE5112-0CH50
BrandSiemens
TWD1,820.00
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. 768-6503
Mfr. Part No.3SE5122-0PA00
BrandSiemens
TWD1,035.00
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. 749-7616
Mfr. Part No.3SE5122-0BE01
BrandSiemens
TWD1,574.00
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. 749-7565
Mfr. Part No.3SE5112-0BE01
BrandSiemens
TWD1,574.00
Each
units
Roller Lever Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS Stock No. 228-087
Mfr. Part No.3SE5242-0HC05
BrandSiemens
TWD801.00
Each
units
Plunger - NO/NC - IP66, IP67 Screw Plastic - - - - 3SE5 33mm 60.7 x 55.5 x 33 mm
RS Stock No. 749-7600
Mfr. Part No.3SE5112-0LC02
BrandSiemens
TWD1,668.00
Each
units
Plunger Yes NO/2NC - IP66, IP67 Screw Metal - - - 3PST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS Stock No. 749-7678
Mfr. Part No.3SE5232-0HR01
BrandSiemens
TWD1,179.00
Each
units
Spring Rod Yes NO/NC - IP65 Screw Plastic - - - DPST 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 498-961
Mfr. Part No.3SE5112-0BA00
BrandSiemens
TWD1,024.00
Each
units
- - NO/NC Slow - Screw Metal 1 2 M20 x 1.5 DP 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS Stock No. 755-7853
Mfr. Part No.3SE5413-0CC21-1EA2
BrandSiemens
TWD1,707.00
Each
units
Round Plunger Yes NO/NC Snap - Cable - - 2 5 x 0.75 mm² DPST 3SE5 16.2mm 50 x 30 x 16.2 mm
RS Stock No. 411-3021
Mfr. Part No.3SE2243-0XX40
BrandSiemens
TWD1,326.00
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. 749-7571
Mfr. Part No.3SE5112-0CB01
BrandSiemens
TWD1,207.00
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. 755-7887
Mfr. Part No.3SE5413-0CN20-1EB1
BrandSiemens
TWD1,778.00
Each
units
Twist Lever Yes NO/NC Snap - M12 - - 2 - DPST 3SE5 16.2mm 50 x 30 x 16.2 mm
RS Stock No. 749-7681
Mfr. Part No.3SE5232-0LD03
BrandSiemens
TWD865.00
Each
units
Roller Plunger Yes NO/2NC - IP65 Screw Plastic - - - 3PST 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 755-7904
Mfr. Part No.3SE5423-0CD21-1EA2
BrandSiemens
TWD2,203.00
Each
units
Roller Plunger Yes NO/NC Snap - Cable - - 2 5 x 0.75 mm² DPST 3SE5 16mm 50 x 40 x 16 mm
RS Stock No. 768-6538
Mfr. Part No.3SE5162-0CA00
BrandSiemens
TWD2,759.00
Each
units
Round Plunger - 2NO/2NC Snap - Screw Metal 3 4 M20 x 1.5 - 3SE5 100mm 56 x 37 x 100 mm
RS Stock No. 768-6298
Mfr. Part No.3SE5232-0PC05
BrandSiemens
TWD685.00
Each
units
Round Plunger Yes 2NO/NC Slow - Screw Plastic 1 3 M20 x 1.5 - 3SE5 68mm 31 x 33 x 68 mm
RS Stock No. 755-7913
Mfr. Part No.3SE5423-0CN20-1EA2
BrandSiemens
TWD2,005.00
Each
units
Twist Lever Yes NO/NC Snap - Cable - - 2 5 x 0.75 mm² DPST 3SE5 16mm 50 x 40 x 16 mm