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. 769-6229
Mfr. Part No.3SE5242-0HD03
BrandSiemens
MYR130.65
Each
units
Roller Plunger Yes NO/NC Snap - Screw Plastic 2 2 M20 x 1.5 - 3SE5 53mm 50 x 33 x 53 mm
RS Stock No. 769-6740
Mfr. Part No.3SE5250-0BC05
BrandSiemens
MYR120.13
Each
units
Plunger Yes NO/NC Slow - Screw Plastic - 2 - - 3SE5 48.5mm 30 x 20 x 48.5 mm
RS Stock No. 749-7593
Mfr. Part No.3SE5112-0CR01
BrandSiemens
MYR196.84
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. 498-961
Mfr. Part No.3SE5112-0BA00
BrandSiemens
MYR147.30
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. 749-7650
Mfr. Part No.3SE5232-0HD03
BrandSiemens
MYR121.88
Each
units
Roller Plunger Yes NO/NC - IP65 Screw Plastic - - - DPST 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 768-6500
Mfr. Part No.3SE5122-0MA00
BrandSiemens
MYR138.62
Each
units
Round Plunger - NO/2NC Slow - Screw Metal 3 3 M20 x 1.5 - 3SE5 78mm 56 x 37.8 x 78 mm
RS Stock No. 410-6916
Mfr. Part No.SK-U1Z M
MYR107.56
Each
units
- - - - - - - - - - - - - -
RS Stock No. 757-9159
Mfr. Part No.D4B4116N
BrandOmron
MYR348.76
Each
units
Roller Lever Yes NO/NC Snap - Screw Metal 1 2 M20 DPST D4B-N 43mm 99.5 x 40 x 43 mm
RS Stock No. 258-8170
Mfr. Part No.GSAC20A1B
BrandHoneywell
MYR590.06
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. 410-7357
Mfr. Part No.I88-U1Z W
MYR85.95
Each
units
Radius 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. 202-3847
Mfr. Part No.GHG2610005R0005
BrandCEAG
MYR1,422.16
Each
units
- - NO/2NC - - Screw Polyamide 2 3 M20 3P - 112mm 102 x 84 x 112 mm
RS Stock No. 274-7981
Mfr. Part No.GHG2622301R0007
BrandCEAG
MYR1,651.31
Each
units
- - NO/NC - - Screw Polyamide 2 2 M20 DP - 112mm 102 x 84 x 112 mm
RS Stock No. 410-6922
Mfr. Part No.SKC-A1Z M
MYR109.96
Each
units
- - - - - - - - - - - - - -
RS Stock No. 698-8779
Mfr. Part No.EX-ZS 335-11Z-3G/D
BrandSchmersal
MYR379.45
Each
units
Plunger Yes NO/NC Snap - Screw Metal 1 2 M20 x 1.5 DP EX-ZS 335 38mm 66.5 x 40.5 x 38 mm
RS Stock No. 749-7631
Mfr. Part No.3SE5122-0CE01
BrandSiemens
MYR205.13
Each
units
Roller Lever Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.8mm 85.7 x 56 x 37.8 mm
RS Stock No. 836-2735
Mfr. Part No.D4N112H
BrandOmron
MYR130.28
Each
units
Adjust Roller Lever Yes NO/NC Snap IP67 Screw Metal 1 2 PG13.5 DPST D4N 82.5mm 31 x 48.2 x 82.5 mm
RS Stock No. 768-6361
Mfr. Part No.3SE5242-0KC05
BrandSiemens
MYR124.70
Each
units
Round Plunger Yes NO/2NC Slow - Screw Plastic 2 3 M20 x 1.5 - 3SE5 53mm 50 x 33 x 53 mm
RS Stock No. 755-7900
Mfr. Part No.3SE5423-0CD20-1EB1
BrandSiemens
MYR263.74
Each
units
Roller Plunger Yes NC/NO Snap - M12 Screw - - 2 - DPST 3SE5 16mm 50 x 40 x 16 mm
RS Stock No. 228-071
Mfr. Part No.3SE5242-0BC05
BrandSiemens
MYR112.14
Each
units
Plunger - NO/NC - IP66, IP67 Screw Plastic - - - - 3SE5 33mm 60.7 x 55.5 x 33 mm
RS Stock No. 411-3021
Mfr. Part No.3SE2243-0XX40
BrandSiemens
MYR177.14
Each
units
- - NO/NC Slow IP65 Screw Fibreglass 3 3 M20 x 1.5 - 3SE5 30mm 90 x 52 x 30 mm
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