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. 179-7567
BrandRS PRO
$34.09
Each
units
Roller Plunger Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 84.5mm 31 x 30.5 x 84.5 mm
RS Stock No. 768-6430
Mfr. Part No.3SE5212-0LC05
BrandSiemens
$48.96
Each
units
Round Plunger Yes NO/2NC Snap - Screw Metal 1 3 M20 x 1.5 - 3SE5 68mm 31 x 33 x 68 mm
RS Stock No. 768-6474
Mfr. Part No.3SE5112-0CA00
BrandSiemens
$51.22
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
RS Stock No. 755-7847
Mfr. Part No.3SE5413-0CC20-1EA5
BrandSiemens
$113.23
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. 133-0057
Mfr. Part No.XCSP3702P20
$65.25
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. 136-3199
Mfr. Part No.6087835015
$99.76
Each
units
Lever, Roller Yes 2NC - IP65 Screw Die Cast Aluminium 1 2 M20 x 1.5 DPST ENM2 125.5mm 40 x 61 x 125.5 mm
RS Stock No. 769-6279
Mfr. Part No.3SE5132-0CF05
BrandSiemens
$60.99
Each
units
Roller 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. 769-6273
Mfr. Part No.3SE5132-0CJ01
BrandSiemens
$65.21
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. 749-7571
Mfr. Part No.3SE5112-0CB01
BrandSiemens
$62.16
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. 836-2741
Mfr. Part No.D4N4A31
BrandOmron
$61.39
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. 755-7913
Mfr. Part No.3SE5423-0CN20-1EA2
BrandSiemens
$103.27
Each
units
Twist Lever Yes NO/NC Snap - Cable - - 2 5 x 0.75 mm² DPST 3SE5 16mm 50 x 40 x 16 mm
RS Stock No. 132-9173
Mfr. Part No.XCSP3902P20
$138.28
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. 749-7577
Mfr. Part No.3SE5112-0BH01
BrandSiemens
$90.55
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. 132-9170
Mfr. Part No.XCSTE7511
$489.97
Each
units
Key Yes - - IP67 - Plastic - - - - XCS-TE 94mm 110 x 33 x 94 mm
RS Stock No. 136-3211
Mfr. Part No.6097185085
$511.83
Each
units
Lever, Roller Yes NO/NC - IP66, IP67 Cable Gland Die Cast Aluminium 1 2 M20 x 1.5 SPST ENM2-EX 134.5mm 40 x 61 x 134.5 mm
RS Stock No. 749-7672
Mfr. Part No.3SE5232-0KD03
BrandSiemens
$46.00
Each
units
Roller Plunger Yes NO/2NC - IP65 Screw Plastic - - - 3PST 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 769-6223
Mfr. Part No.3SE5242-0HE10
BrandSiemens
$57.29
Each
units
Roller Lever Yes NO/NC Snap - Screw Plastic 2 2 M20 x 1.5 - 3SE5 53mm 50 x 33 x 53 mm
RS Stock No. 861-4648
Mfr. Part No.D4N-2187
BrandOmron
$68.66
Each
units
Rod Yes NO/NC Snap IP67 M20 - - 2 - DPST D4N 170mm 31 x 31.5 x 170 mm
RS Stock No. 410-7408
Mfr. Part No.I88-U1Z-HW
$49.14
Each
units
Roller Lever Yes NO/NC Slow IP65 Screw Fibreglass 1 2 M20 x 1.5 - I88 SU/U 30.5mm 62 x 22 x 30.5 mm
RS Stock No. 836-2747
Mfr. Part No.D4N1A62
BrandOmron
$61.39
Each
units
One Way Roller Arm Lever Yes NO/NC Slow IP67 Screw - 1 2 PG13.5 DPST D4N 92mm 31 x 31.5 x 92 mm
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