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. 258-8170
Mfr. Part No.GSAC20A1B
BrandHoneywell
$266.98
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. 410-7414
Mfr. Part No.I88-SU1Z HW
$46.56
Each
units
Roller Lever Yes NO/NC Snap IP65 Screw Fibreglass 1 2 M20 x 1.5 - I88 SU/U 30.5mm 62 x 22 x 30.5 mm
RS Stock No. 749-7600
Mfr. Part No.3SE5112-0LC02
BrandSiemens
$110.46
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. 202-3847
Mfr. Part No.GHG2610005R0005
BrandCEAG
$528.46
Each
units
- - NO/2NC - - Screw Polyamide 2 3 M20 3P - 112mm 102 x 84 x 112 mm
RS Stock No. 410-7329
Mfr. Part No.I88-U1 AV
$61.55
Each
units
Spindle 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. 768-6298
Mfr. Part No.3SE5232-0PC05
BrandSiemens
$45.35
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. 746-7267
Mfr. Part No.D4N-4172
BrandOmron
$41.21
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. 766-1722
Mfr. Part No.XCSM4115L1
$445.50
Each
units
Rotary Lever Yes 2NO/2NC Snap - Cable Metal - 4 - 4P XCSM 34mm 94 x 30 x 34 mm
RS Stock No. 498-965
Mfr. Part No.3SE5232-0CC05
BrandSiemens
$26.86
Each
units
Plunger Yes NO/NC Snap IP65 Screw Plastic 1 2 M20 x 1.5 - 3SE5 33mm 75.7 x 31 x 33 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. 302-0057
Mfr. Part No.XCLJ761H29
$121.52
Each
units
Plunger Yes 2NC Slow IP66 Screw Metal 1 2 20 mm - XCL-J 40mm 107 x 44 x 40 mm
RS Stock No. 410-6900
Mfr. Part No.SK-A2Z M
$59.77
Each
units
- - - - - - - - - - - - - -
RS Stock No. 749-7596
Mfr. Part No.3SE5112-0CF01
BrandSiemens
$101.50
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. 766-1624
Mfr. Part No.XCSD3910P20
$139.62
Each
units
Plunger Yes NO/2NC Snap - M20 Metal 1 3 M20 x 1.5 3P XCSD 35mm 89 x 34 x 35 mm
RS Stock No. 498-961
Mfr. Part No.3SE5112-0BA00
BrandSiemens
$67.48
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. 768-6333
Mfr. Part No.3SE5132-0LA00
BrandSiemens
$50.84
Each
units
Round Plunger - NO/2NC Snap - Screw Plastic 1 3 M20 x 1.5 - 3SE5 78mm 40.5 x 37.3 x 78 mm
RS Stock No. 768-6437
Mfr. Part No.3SE5212-0KC05
BrandSiemens
$60.90
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. 836-2753
Mfr. Part No.D4N8131
BrandOmron
$40.52
Each
units
Top Plunger Yes NO/NC Snap IP67 Screw - 1 2 M20 DPST D4N 65mm 59 x 31.5 x 65 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. 764-3427
Mfr. Part No.D4B-4113N
BrandOmron
$148.21
Each
units
Roller Lever Yes NO/NC Snap IP67 Screw Die Cast Aluminium - 2 - DPST D4B-N 56mm 99.5 x 40 x 56 mm
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