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. 410-6916
Mfr. Part No.SK-U1Z M
$44.78
Each
units
Radius Yes NO/NC Slow IP65 Screw Fibreglass 3 2 M20 x 1.5 - ENM2 33.5mm 90 x 52 x 33.5 mm
RS Stock No. 861-4648
Mfr. Part No.D4N-2187
BrandOmron
$63.36
Each
units
Rod Yes NO/NC Snap IP67 M20 - - 2 - DPST D4N 170mm 31 x 31.5 x 170 mm
RS Stock No. 766-1611
Mfr. Part No.XCSD3719P20
$158.47
Each
units
Rotary Lever Yes NO/2NC Slow - Cable Metal 1 3 M20 x 1.5 3P XCSD 35mm 122 x 34 x 35 mm
RS Stock No. 258-8259
Mfr. Part No.GSAC21C
BrandHoneywell
$225.11
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. 274-7981
Mfr. Part No.GHG2622301R0007
BrandCEAG
$717.06
Each
units
- - NO/NC - - Screw Polyamide 2 2 M20 DP - 112mm 102 x 84 x 112 mm
RS Stock No. 698-8779
Mfr. Part No.EX-ZS 335-11Z-3G/D
BrandSchmersal
$166.00
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. 410-6922
Mfr. Part No.SKC-A1Z M
$57.81
Each
units
- - - - - - - - - - - - - -
RS Stock No. 410-7420
Mfr. Part No.I88-U1Z AH
$56.79
Each
units
Spindle 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. 302-0041
Mfr. Part No.XCLJ565H29
$141.05
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. 755-7847
Mfr. Part No.3SE5413-0CC20-1EA5
BrandSiemens
$127.47
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. 302-0029
Mfr. Part No.XCLJ564H29
$141.05
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. 410-7149
Mfr. Part No.SK-U1Z MRU
$76.13
Each
units
- - - - - - - - - - - - - -
RS Stock No. 749-7616
Mfr. Part No.3SE5122-0BE01
BrandSiemens
$105.80
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. 311-0245
Mfr. Part No.GSAC40A1B
BrandHoneywell
$255.52
Each
units
Roller, Rotary Yes 4NC Slow - Screw Metal - 4 M20 x 1.5 4P GSS 55.9mm 145.8 x 42 x 55.9 mm
RS Stock No. 749-7688
Mfr. Part No.3SE5234-0HD03-1AC4
BrandSiemens
$94.11
Each
units
Roller Plunger Yes NO/NC - IP65 M12 Plastic - - - 4PST 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 746-7251
Mfr. Part No.D4N-4131
BrandOmron
$54.46
Each
units
Plunger Yes NO/NC Snap - Screw - - 2 M20 DPST D4N 31.5mm 64 x 31 x 31.5 mm
RS Stock No. 749-7599
Mfr. Part No.3SE5112-0CH50
BrandSiemens
$122.33
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. 227-977
Mfr. Part No.3SE5232-0HC05
BrandSiemens
$46.31
Each
units
Plunger - NO/NC - IP65 Screw Plastic - - - - 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 410-7048
Mfr. Part No.ENM2-SU1Z RIW
$58.40
Each
units
- - - - - - - - - - - - - -
RS Stock No. 746-7264
Mfr. Part No.D4N-4162
BrandOmron
$58.03
Each
units
Roller Lever Yes NO/NC Snap - Screw - - 2 M20 DPST D4N 31.5mm 64 x 31 x 31.5 mm
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Description:
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Description:
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Description:
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