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. 755-7890
Mfr. Part No.3SE5423-0CC20-1EB1
BrandSiemens
€53.96
Each
units
Round Plunger Yes NO/NC Snap - M12 - - 2 - DPST 3SE5 16mm 50 x 40 x 16 mm
RS Stock No. 133-0057
Mfr. Part No.XCSP3702P20
€31.73
Each
units
Roller Plunger Yes NO/2NC Slow IP66, IP67 M20 Plastic 1 3 M20 x 1.5 3P XCSP 100mm 34 x 35 x 100 mm
RS Stock No. 755-7869
Mfr. Part No.3SE5413-0CD20-1EB1
BrandSiemens
€49.35
Each
units
Roller Plunger Yes NO/NC Snap - M12 - - 2 - DPST 3SE5 16.2mm 50 x 30 x 16.2 mm
RS Stock No. 228-245
Mfr. Part No.3SE5232-0BC05
BrandSiemens
€19.41
Each
units
Plunger - NO/NC - IP65 Screw Plastic - - - - 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 132-9173
Mfr. Part No.XCSP3902P20
€29.69
Each
units
Roller Plunger Yes NO/2NC Snap IP66, IP67 M20 Plastic 1 3 M20 x 1.5 3P XCSP 100mm 34 x 35 x 100 mm
RS Stock No. 179-9878
Mfr. Part No.XCSA522
€111.00
Each
units
- - 2NO/NC - IP67 M20 Metal 1 3 M20 3P XCSA 114mm 40 x 44 x 114 mm
RS Stock No. 755-7875
Mfr. Part No.3SE5413-0CN20-1EA2
BrandSiemens
€48.31
Each
units
Twist Lever 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. 749-7583
Mfr. Part No.3SE5112-0CD02
BrandSiemens
€51.66
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. 746-7270
Mfr. Part No.D4N-4187
BrandOmron
€34.69
Each
units
Plastic Rod Yes NO/NC Snap - Screw - - 2 - DPST D4N 31.5mm 64 x 31 x 31.5 mm
RS Stock No. 768-6474
Mfr. Part No.3SE5112-0CA00
BrandSiemens
€28.26
Each
units
Round Plunger - NO/NC Snap - Screw Metal 1 2 M20 x 1.5 - 3SE5 78mm 40.5 x 37.3 x 78 mm
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