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. 179-7565
BrandRS PRO
MYR118.66
Each
units
Cat Whisker Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 172mm 31 x 31 x 172 mm
RS Stock No. 179-7567
BrandRS PRO
MYR91.66
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. 179-7566
BrandRS PRO
MYR118.66
Each
units
Roller Arm Lever Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 89mm 31 x 31 x 89 mm
RS Stock No. 179-7568
BrandRS PRO
MYR91.66
Each
units
Plunger Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 74.5mm 31 x 31 x 74.5 mm
RS Stock No. 179-7570
BrandRS PRO
MYR101.85
Each
units
Roller Lever Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 107mm 31 x 47.5 x 107 mm
RS Stock No. 179-7562
BrandRS PRO
MYR135.80
Each
units
- - 2NC Slow IP67 Screw Plastic - - - - - 95mm 31 x 31 x 95 mm
RS Stock No. 179-7569
BrandRS PRO
MYR101.85
Each
units
Roller Lever Yes NO/NC Snap IP67 - Glass Fibre Reinforced Plastic - - - - - 62mm 31 x 45 x 62 mm
RS Stock No. 179-7563
BrandRS PRO
MYR135.80
Each
units
- - NO/NC Slow IP67 Screw Plastic - - - - - 95mm 31 x 31 x 95 mm
RS Stock No. 179-7561
BrandRS PRO
MYR135.80
Each
units
- - 2NC/NO Slow IP67 Screw Plastic - - - - - 95mm 31 x 31 x 95 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. 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. 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. 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. 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. 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. 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. 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
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