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. 769-6267
Mfr. Part No.3SE5132-0CD05
BrandSiemens
$51.29
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. 498-961
Mfr. Part No.3SE5112-0BA00
BrandSiemens
$48.53
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. 498-892
Mfr. Part No.3SE5250-0LC05
BrandSiemens
$31.03
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. 228-245
Mfr. Part No.3SE5232-0BC05
BrandSiemens
$31.97
Each
units
Plunger - NO/NC - IP65 Screw Plastic - - - - 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 768-6468
Mfr. Part No.3SE5112-0MA00
BrandSiemens
$49.32
Each
units
Round Plunger - NO/2NC Slow - Screw Metal 1 3 M20 x 1.5 - 3SE5 78mm 40.5 x 37.3 x 78 mm
RS Stock No. 746-7267
Mfr. Part No.D4N-4172
BrandOmron
$49.75
Each
units
Roller Lever Yes NO/NC Snap - Screw - - 2 M20 DPST D4N 31.5mm 64 x 31 x 31.5 mm
RS Stock No. 410-7111
Mfr. Part No.C2-U1Z
$27.25
Each
units
Radius Yes NO/NC Slow IP20 Screw Fibreglass 1 2 8.5 x 3.5 mm - C2 21mm 44 x 26 x 21 mm
RS Stock No. 766-1722
Mfr. Part No.XCSM4115L1
$117.00
Each
units
Rotary Lever Yes 2NO/2NC Snap - Cable Metal - 4 - 4P XCSM 34mm 94 x 30 x 34 mm
RS Stock No. 749-7650
Mfr. Part No.3SE5232-0HD03
BrandSiemens
$38.27
Each
units
Roller Plunger Yes NO/NC - IP65 Screw Plastic - - - DPST 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 768-6456
Mfr. Part No.3SE5214-0LC05-1AE1
BrandSiemens
$74.72
Each
units
Round Plunger Yes 2NC Snap - Screw Metal 1 2 M20 x 1.5 - 3SE5 68mm 31 x 33 x 68 mm
RS Stock No. 757-9156
Mfr. Part No.D4B-4171N
BrandOmron
$91.53
Each
units
Roller Plunger Yes NO/NC Snap - Screw Metal 1 2 M20 DPST D4B-N 43mm 97 x 40 x 43 mm
RS Stock No. 746-7258
Mfr. Part No.D4N-412H
BrandOmron
$62.97
Each
units
Roller Lever Yes NO/NC Snap - Screw - - 2 M20 DPST D4N 48.2mm 64 x 31 x 48.2 mm
RS Stock No. 410-6900
Mfr. Part No.SK-A2Z M
$59.77
Each
units
- - - - - - - - - - - - - -
RS Stock No. 768-6437
Mfr. Part No.3SE5212-0KC05
BrandSiemens
$43.79
Each
units
Round Plunger Yes NO/2NC Slow - Screw Metal 1 3 M20 x 1.5 - 3SE5 68mm 31 x 33 x 68 mm
RS Stock No. 836-2741
Mfr. Part No.D4N4A31
BrandOmron
$55.81
Each
units
Top Plunger Yes NO/NC Slow IP67 Screw - 1 2 M20 DPST D4N 73.2mm 31 x 31.5 x 73.2 mm
RS Stock No. 757-9152
Mfr. Part No.D4B4117N
BrandOmron
$158.52
Each
units
Rod Lever Yes NO/NC Snap - Screw Metal 1 2 M20 DPST D4B-N 43mm 99.5 x 40 x 43 mm
RS Stock No. 749-7701
Mfr. Part No.3SE5423-0CC20-1EA2
BrandSiemens
$88.53
Each
units
Plunger Yes NO/NC - IP67 M12 Metal - - - DPST 3SE5 16mm 50 x 40 x 16 mm
RS Stock No. 136-3193
Mfr. Part No.6086821099
$58.66
Each
units
Lever, Roller Yes 2NC - IP65 Screw Thermoplastic 1 2 M20 x 1.5 DPST I88 84.5mm 31 x 30.5 x 84.5 mm
RS Stock No. 755-7856
Mfr. Part No.3SE5413-0CC20-1EA2
BrandSiemens
$72.47
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. 755-7900
Mfr. Part No.3SE5423-0CD20-1EB1
BrandSiemens
$93.78
Each
units
Roller Plunger Yes NC/NO Snap - M12 Screw - - 2 - DPST 3SE5 16mm 50 x 40 x 16 mm
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