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. 766-1719
Mfr. Part No.XCSM3910L1
€50.90
Each
units
Plunger Yes NO/2NC Snap - Cable Metal - 3 - 3P XCSM 16mm 60 x 30 x 16 mm
RS Stock No. 766-1611
Mfr. Part No.XCSD3719P20
€40.95
Each
units
Rotary Lever Yes NO/2NC Slow - Cable Metal 1 3 M20 x 1.5 3P XCSD 35mm 122 x 34 x 35 mm
RS Stock No. 769-6743
Mfr. Part No.3SE5250-0PC05
BrandSiemens
€20.20
Each
units
Plunger Yes 2NO/NC Slow - Screw Plastic - 3 - - 3SE5 48.5mm 30 x 20 x 48.5 mm
RS Stock No. 873-2231
Mfr. Part No.440P-MRPS11B
€43.94
Each
units
Roller Plunger Yes NO/NC Snap IP66 M20 Metal - 2 - SPST 440P 43mm 118 x 40 x 43 mm
RS Stock No. 621-1543
Mfr. Part No.D4N-1132
BrandOmron
€21.52
Each
units
Roller Plunger Yes NO/NC Snap IP67 Screw - - 2 - SPDT D4N 31.5mm 83.6 x 31 x 31.5 mm
RS Stock No. 746-7242
Mfr. Part No.D4N-4120
BrandOmron
€24.09
Each
units
Roller Lever Yes NO/NC Snap - Screw - - 2 M20 DPST D4N 47mm 64 x 31 x 47 mm
RS Stock No. 258-8108
Mfr. Part No.GSAC01D
BrandHoneywell
€93.90
Each
units
Plunger Yes NO/NC Snap - Screw Metal - 2 M20 x 1.5 DP GSS 42mm 141 x 42 x 42 mm
RS Stock No. 411-3021
Mfr. Part No.3SE2243-0XX40
BrandSiemens
€38.32
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. 258-8170
Mfr. Part No.GSAC20A1B
BrandHoneywell
€131.94
Each
units
Rotary Yes 2NO/2NC Snap - Screw Metal - 4 M20 x 1.5 4P GSS 55.9mm 145.8 x 42 x 55.9 mm
RS Stock No. 759-156
Mfr. Part No.440P-M18002
€17.80
Each
units
Roller Yes NO/NC Slow IP30 Screw PBT - 2 - - 440P 23.3mm 54 x 25 x 23.3 mm
RS Stock No. 479-3037
Mfr. Part No.XCSM3902L2
€56.86
Each
units
Plunger Yes NO/2NC Snap IP67, IP68 Cable Metal - 3 - - XCSM 16mm 70 x 30 x 16 mm
RS Stock No. 410-7341
Mfr. Part No.C2-SU1Z
€15.73
Each
units
Radius Yes NO/NC Snap IP20 Screw Fibreglass 1 2 8.5 x 3.5 mm - C2 21mm 44 x 26 x 21 mm
RS Stock No. 749-7577
Mfr. Part No.3SE5112-0BH01
BrandSiemens
€50.86
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. 769-6248
Mfr. Part No.3SE5162-0CD02
BrandSiemens
€103.00
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. 258-8091
Mfr. Part No.GSAC01C
BrandHoneywell
€66.94
Each
units
Plunger Yes NO/NC Snap - Screw Metal - 2 M20 x 1.5 DP GSS 42mm 141 x 42 x 42 mm
RS Stock No. 498-909
Mfr. Part No.3SE5250-0KC05
BrandSiemens
€20.05
Each
units
Plunger Yes 2NC/1NO Slow IP10 Screw Plastic - 3 - - 3SE5 27.8mm 59.2 x 30 x 27.8 mm
RS Stock No. 749-7593
Mfr. Part No.3SE5112-0CR01
BrandSiemens
€43.99
Each
units
Spring Rod Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS Stock No. 479-3043
Mfr. Part No.XCSM3902L5
€68.44
Each
units
Roller Plunger Yes NO/2NC Snap IP67, IP68 Cable Metal - 3 - - XCSM 16mm 70 x 30 x 16 mm
RS Stock No. 769-6267
Mfr. Part No.3SE5132-0CD05
BrandSiemens
€31.14
Each
units
Roller Plunger 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. 228-071
Mfr. Part No.3SE5242-0BC05
BrandSiemens
€24.27
Each
units
Plunger - NO/NC - IP66, IP67 Screw Plastic - - - - 3SE5 33mm 60.7 x 55.5 x 33 mm
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