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. 757-9140
Mfr. Part No.D4B4111N
BrandOmron
HK$843.78
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. 766-1712
Mfr. Part No.XCSM3915L1
HK$484.50
Each
units
Rotary Lever Yes NO/2NC Snap - Cable Metal - 3 - 3P XCSM 34mm 94 x 30 x 34 mm
RS Stock No. 749-7653
Mfr. Part No.3SE5232-0BD03
BrandSiemens
HK$214.27
Each
units
Roller Plunger Yes NO/NC - IP65 Screw Plastic - - - DPST 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 410-7341
Mfr. Part No.C2-SU1Z
HK$138.42
Each
units
Radius Yes NO/NC Snap IP20 Screw Fibreglass 1 2 8.5 x 3.5 mm - C2 21mm 44 x 26 x 21 mm
RS Stock No. 766-1627
Mfr. Part No.XCSD3918P20
HK$324.00
Each
units
Rotary Lever Yes NO/2NC Snap - Cable Metal 1 3 M20 x 1.5 3P XCSD 35mm 122 x 34 x 35 mm
RS Stock No. 447-4635
Mfr. Part No.XCSM3910L2
HK$548.41
Each
units
Plunger Head Yes NO/2NC Snap IP66, IP67, IP68 Screw Metal - 3 - - XCSM 16mm 60 x 30 x 16 mm
RS Stock No. 746-7264
Mfr. Part No.D4N-4162
BrandOmron
HK$222.24
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. 302-0041
Mfr. Part No.XCLJ565H29
HK$3,052.80
Each
units
Roller Plunger Yes NO/NC Slow IP66 Screw Metal 1 2 20 mm - XCL-J 63.6mm 100 x 40 x 63.6 mm
RS Stock No. 769-6223
Mfr. Part No.3SE5242-0HE10
BrandSiemens
HK$278.22
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. 258-8192
Mfr. Part No.GSAC20B
BrandHoneywell
HK$1,185.76
Each
units
Plunger Yes 2NO/2NC Snap - Screw Metal - 4 - 4P GSS 42mm 145.8 x 42 x 42 mm
RS Stock No. 133-0058
Mfr. Part No.XCSPL962
HK$494.25
Each
units
Straight Lever Yes NO/2NC Slow IP67 M16 Nylon 66, Plastic 1 3 M16 x 1.5 3P XCSPL 161mm 30 x 30 x 161 mm
RS Stock No. 179-9878
Mfr. Part No.XCSA522
HK$988.51
Each
units
- - 2NO/NC - IP67 M20 Metal 1 3 M20 3P XCSA 114mm 40 x 44 x 114 mm
New
RS Stock No. 202-1649
Mfr. Part No.3SE5232-0HK50
BrandSiemens
HK$397.87
Each
units
Roller - NO/NC - IP65 - Plastic - - - SPDT 1NO/1NC - - -
RS Stock No. 136-3202
Mfr. Part No.6089152048
HK$262.64
Each
units
Plunger Yes NO/NC Snap IP67 Cable Polymeric 1 2 - SPST I49 60mm 30 x 16 x 60 mm
RS Stock No. 749-7612
Mfr. Part No.3SE5122-0BB01
BrandSiemens
HK$315.52
Each
units
Plunger Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.8mm 85.7 x 56 x 37.8 mm
RS Stock No. 258-8108
Mfr. Part No.GSAC01D
BrandHoneywell
HK$860.06
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. 755-7865
Mfr. Part No.3SE5413-0CD20-1EA2
BrandSiemens
HK$405.43
Each
units
Roller 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. 836-2750
Mfr. Part No.D4N4A32
BrandOmron
HK$206.84
Each
units
Top Roller Plunger Yes NO/NC Slow IP67 Screw - 1 2 M20 DPST D4N 83.6mm 31 x 31.5 x 83.6 mm
RS Stock No. 195-1768
Mfr. Part No.XCSM3916L5
HK$675.53
Each
units
Lever Yes 2NC/1NO Snap IP66, IP67, IP68 Pre-Cabled Zamak 1 7 7 x 0.5 mm² 3P XCSM 94mm 30 x 34 x 94 mm
RS Stock No. 749-7656
Mfr. Part No.3SE5232-0BE10
BrandSiemens
HK$243.79
Each
units
Roller Lever Yes NO/NC - IP65 Screw Plastic - - - DPST 3SE5 33mm 75.7 x 31 x 33 mm
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