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. 479-3043
Mfr. Part No.XCSM3902L5
MYR404.77
Each
units
Roller Plunger Yes NO/2NC Snap IP67, IP68 Cable Metal - 3 - - XCSM 16mm 70 x 30 x 16 mm
RS Stock No. 764-3427
Mfr. Part No.D4B-4113N
BrandOmron
MYR410.81
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
RS Stock No. 410-7262
Mfr. Part No.C2-A2Z ST.
MYR84.79
Each
units
Plunger Yes 2NC Slow IP20 Screw Fibreglass 1 2 8.5 x 3.5 mm - C2 21mm 44 x 26 x 21 mm
RS Stock No. 302-0063
Mfr. Part No.XCLJ767H29
MYR368.03
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. 410-7240
Mfr. Part No.ENM2-SU1 AD
MYR164.41
Each
units
- - - - - - - - - - - - - -
RS Stock No. 410-7391
Mfr. Part No.I88-SU1Z RIWK
MYR116.08
Each
units
Roller Plunger 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. 302-0057
Mfr. Part No.XCLJ761H29
MYR342.72
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. 227-977
Mfr. Part No.3SE5232-0HC05
BrandSiemens
MYR88.71
Each
units
Plunger - NO/NC - IP65 Screw Plastic - - - - 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 749-7580
Mfr. Part No.3SE5112-0CC02
BrandSiemens
MYR214.54
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. 757-9140
Mfr. Part No.D4B4111N
BrandOmron
MYR290.44
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. 769-6273
Mfr. Part No.3SE5132-0CJ01
BrandSiemens
MYR169.67
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. 258-8158
Mfr. Part No.GSAC04C
BrandHoneywell
MYR526.58
Each
units
Plunger Yes NO/NC Snap - Screw Metal - 2 M20 x 1.5 DP GSS 42mm 141 x 42 x 42 mm
RS Stock No. 274-7997
Mfr. Part No.GHG2632301R0007
BrandCEAG
MYR2,765.23
Each
units
- - NO/NC - - Screw Polyamide 2 2 M25 DP - 112mm 102 x 84 x 112 mm
RS Stock No. 228-087
Mfr. Part No.3SE5242-0HC05
BrandSiemens
MYR107.11
Each
units
Plunger - NO/NC - IP66, IP67 Screw Plastic - - - - 3SE5 33mm 60.7 x 55.5 x 33 mm
RS Stock No. 410-7048
Mfr. Part No.ENM2-SU1Z RIW
MYR136.14
Each
units
- - - - - - - - - - - - - -
RS Stock No. 621-1515
Mfr. Part No.D4N-1120
BrandOmron
MYR133.34
Each
units
Roller Lever Yes NO/NC Snap IP67 Screw - - 2 - SPDT D4N 47mm 73 x 31 x 47 mm
RS Stock No. 755-7875
Mfr. Part No.3SE5413-0CN20-1EA2
BrandSiemens
MYR251.44
Each
units
Twist Lever 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. 768-6424
Mfr. Part No.3SE5242-0HC05-1AJ0
BrandSiemens
MYR163.04
Each
units
Round Plunger Yes NO/NC Snap - Screw Plastic 1 2 M20 x 1.5 - 3SE5 53mm 50 x 33 x 53 mm
RS Stock No. 768-6367
Mfr. Part No.3SE5242-1LC05
BrandSiemens
MYR179.35
Each
units
Round Plunger Yes NO/2NC Snap - Screw Plastic 2 3 M20 x 1.5 - 3SE5 53mm 50 x 33 x 53 mm
RS Stock No. 768-6443
Mfr. Part No.3SE5212-0PC05
BrandSiemens
MYR133.27
Each
units
Round Plunger Yes 2NO/NC Slow - Screw Metal 1 3 M20 x 1.5 - 3SE5 68mm 31 x 33 x 68 mm
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