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. 746-7273
Mfr. Part No.D4N-4A2G
BrandOmron
$94.74
Each
units
Roller Lever Yes NO/NC Slow - Screw - - 2 M20 DPST D4N 45mm 64 x 31 x 45 mm
RS Stock No. 410-7363
Mfr. Part No.I88-SU1Z W
$42.02
Each
units
Radius 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. 410-6988
Mfr. Part No.C2-U1Z R
$30.53
Each
units
Roller Tappet Yes NO/NC Slow IP20 Screw Fibreglass 1 2 8.5 x 3.5 mm - C2 21mm 44 x 26 x 21 mm
RS Stock No. 836-2731
Mfr. Part No.D4B4A11N
BrandOmron
$81.63
Each
units
Roller Lever Yes 2NC Slow IP67 Screw Metal 1 - M20 - D4B 131.3mm 40 x 62 x 131.3 mm
RS Stock No. 749-7628
Mfr. Part No.3SE5122-0CC02
BrandSiemens
$94.38
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. 410-6916
Mfr. Part No.SK-U1Z M
$44.78
Each
units
- - - - - - - - - - - - - -
RS Stock No. 410-7240
Mfr. Part No.ENM2-SU1 AD
$70.53
Each
units
- - - - - - - - - - - - - -
RS Stock No. 411-3021
Mfr. Part No.3SE2243-0XX40
BrandSiemens
$61.40
Each
units
- - NO/NC Slow IP65 Screw Fibreglass 3 3 M20 x 1.5 - 3SE5 30mm 90 x 52 x 30 mm
RS Stock No. 749-7619
Mfr. Part No.3SE5112-0LH60
BrandSiemens
$90.40
Each
units
Twist Lever Yes NO/2NC - IP66, IP67 Screw Metal - - - 3PST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS Stock No. 766-1700
Mfr. Part No.XCSM3902L1
$223.45
Each
units
Roller Plunger Yes NO/2NC Snap - Cable Metal - 3 - 3P XCSM 16mm 70 x 30 x 16 mm
RS Stock No. 861-4648
Mfr. Part No.D4N-2187
BrandOmron
$54.73
Each
units
Rod Yes NO/NC Snap IP67 M20 - - 2 - DPST D4N 170mm 31 x 31.5 x 170 mm
RS Stock No. 302-0029
Mfr. Part No.XCLJ564H29
$102.61
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. 227-977
Mfr. Part No.3SE5232-0HC05
BrandSiemens
$42.15
Each
units
Plunger - NO/NC - IP65 Screw Plastic - - - - 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 302-0041
Mfr. Part No.XCLJ565H29
$293.48
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. 410-7048
Mfr. Part No.ENM2-SU1Z RIW
$58.40
Each
units
- - - - - - - - - - - - - -
RS Stock No. 258-8259
Mfr. Part No.GSAC21C
BrandHoneywell
$131.05
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. 410-7149
Mfr. Part No.SK-U1Z MRU
$76.13
Each
units
- - - - - - - - - - - - - -
RS Stock No. 749-7688
Mfr. Part No.3SE5234-0HD03-1AC4
BrandSiemens
$62.45
Each
units
Roller Plunger Yes NO/NC - IP65 M12 Plastic - - - 4PST 3SE5 33mm 75.7 x 31 x 33 mm
RS Stock No. 755-7847
Mfr. Part No.3SE5413-0CC20-1EA5
BrandSiemens
$102.01
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. 698-8779
Mfr. Part No.EX-ZS 335-11Z-3G/D
BrandSchmersal
$114.64
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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