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. 746-7267
Mfr. Part No.D4N-4172
BrandOmron
MYR190.54
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. 766-1719
Mfr. Part No.XCSM3910L1
MYR265.67
Each
units
Plunger Yes NO/2NC Snap - Cable Metal - 3 - 3P XCSM 16mm 60 x 30 x 16 mm
RS Stock No. 755-7853
Mfr. Part No.3SE5413-0CC21-1EA2
BrandSiemens
MYR228.79
Each
units
Round 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. 198-560
Mfr. Part No.XCSD3919P20
MYR231.93
Each
units
Roller Lever Yes NO/2NC Snap IP66, IP67 Cable Plastic 1 3 M20 x 1.5 - XCSD 35mm 122 x 34 x 35 mm
RS Stock No. 132-9181
Mfr. Part No.XCSPL562
MYR223.14
Each
units
Straight Lever Yes NC/NO Break Before Make IP67 M16 Nylon 66, Plastic 1 2 M16 x 1.5 DP XCSPL 88mm 30 x 103 x 88 mm
RS Stock No. 410-7408
Mfr. Part No.I88-U1Z-HW
MYR124.12
Each
units
Roller Lever 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. 258-8085
Mfr. Part No.GSAC01B
BrandHoneywell
MYR457.48
Each
units
Plunger Yes NO/NC Snap - Screw Metal - 2 M20 x 1.5 DP GSS 55.9mm 145.8 x 42 x 55.9 mm
RS Stock No. 768-6519
Mfr. Part No.3SE5122-0KA00
BrandSiemens
MYR142.15
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. 749-7616
Mfr. Part No.3SE5122-0BE01
BrandSiemens
MYR210.58
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. 749-7599
Mfr. Part No.3SE5112-0CH50
BrandSiemens
MYR246.08
Each
units
Twist Lever Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS Stock No. 302-0007
Mfr. Part No.XCLJ561H29
MYR306.00
Each
units
Plunger Yes NO/NC Slow IP66 Screw Metal 1 2 20 mm - XCL-J 40mm 107 x 44 x 40 mm
RS Stock No. 136-3198
Mfr. Part No.6087817006
MYR230.47
Each
units
Roller Yes 2NC - IP65 Screw Die Cast Aluminium 1 2 M20 x 1.5 DPST ENM2 108mm 40 x 42 x 108 mm
RS Stock No. 749-7644
Mfr. Part No.3SE5212-0CC05
BrandSiemens
MYR115.78
Each
units
Plunger Yes NO/NC - IP66, IP67 Screw Plastic - - - DPST 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 768-6355
Mfr. Part No.3SE5242-0LC05
BrandSiemens
MYR115.46
Each
units
Round Plunger Yes NO/2NC Snap - Screw Plastic 2 3 M20 x 1.5 - 3SE5 53mm 50 x 33 x 53 mm
New
RS Stock No. 195-1768
Mfr. Part No.XCSM3916L5
MYR351.94
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. 311-0273
Mfr. Part No.GSAC40C
BrandHoneywell
MYR603.67
Each
units
Plunger Yes 4NC Slow - Screw Metal - 4 M20 x 1.5 4P GSS 42mm 141 x 42 x 42 mm
RS Stock No. 755-7869
Mfr. Part No.3SE5413-0CD20-1EB1
BrandSiemens
MYR228.79
Each
units
Roller Plunger Yes NO/NC Snap - M12 - - 2 - DPST 3SE5 16.2mm 50 x 30 x 16.2 mm
RS Stock No. 749-7638
Mfr. Part No.3SE5122-0CH80
BrandSiemens
MYR258.96
Each
units
Rod Yes NO/NC - IP65, IP67 Screw Metal - - - DPST 3SE5 37.8mm 85.7 x 56 x 37.8 mm
RS Stock No. 311-0330
Mfr. Part No.GSAC46C
BrandHoneywell
MYR604.35
Each
units
Plunger Yes 4NC Slow - Screw Metal - 4 M20 x 1.5 4P GSS 42mm 141 x 42 x 42 mm
RS Stock No. 749-7596
Mfr. Part No.3SE5112-0CF01
BrandSiemens
MYR251.39
Each
units
Roller Lever Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
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