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
R 1,078.47
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. 198-560
Mfr. Part No.XCSD3919P20
R 1,041.00
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. 757-9156
Mfr. Part No.D4B-4171N
BrandOmron
R 821.43
Each
units
Roller Plunger Yes NO/NC Snap - Screw Metal 1 2 M20 DPST D4B-N 43mm 97 x 40 x 43 mm
RS stock no. 498-892
Mfr. Part No.3SE5250-0LC05
BrandSiemens
R 265.00
Each
units
Plunger Yes 2NC/1NO Snap IP10 Screw Plastic - 3 - - 3SE5 27.8mm 59.2 x 30 x 27.8 mm
RS stock no. 258-8265
Mfr. Part No.GSAC21D
BrandHoneywell
R 2,199.69
Each
units
Roller Lever Yes 2NC/2NO Snap IP67 Screw Metal - 4 - DPDT GSS 42mm 141 x 42 x 42 mm
RS stock no. 621-1515
Mfr. Part No.D4N-1120
BrandOmron
R 519.50
Each
units
Roller Lever Yes NO/NC Snap IP67 Screw - - 2 - SPDT D4N 47mm 73 x 31 x 47 mm
RS stock no. 411-3021
Mfr. Part No.3SE2243-0XX40
BrandSiemens
R 533.00
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. 410-7379
Mfr. Part No.I88-U1Z RIWK
R 383.63
Each
units
Roller Plunger 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. 749-7631
Mfr. Part No.3SE5122-0CE01
BrandSiemens
R 617.00
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. 621-1537
Mfr. Part No.D4N-1131
BrandOmron
R 367.77
Each
units
Plunger Yes NO/NC Snap IP67 Screw - - 2 - SPDT D4N 30mm 73.2 x 31 x 30 mm
RS stock no. 749-7634
Mfr. Part No.3SE5122-0CF01
BrandSiemens
R 617.00
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. 749-7650
Mfr. Part No.3SE5232-0HD03
BrandSiemens
R 323.00
Each
units
Roller Plunger Yes NO/NC - IP65 Screw Plastic - - - DPST 3SE5 33mm 75.7 x 31 x 33 mm
RS stock no. 836-2747
Mfr. Part No.D4N1A62
BrandOmron
R 471.35
Each
units
One Way Roller Arm Lever Yes NO/NC Slow IP67 Screw - 1 2 PG13.5 DPST D4N 92mm 31 x 31.5 x 92 mm
RS stock no. 749-7577
Mfr. Part No.3SE5112-0BH01
BrandSiemens
R 708.00
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. 410-7048
Mfr. Part No.ENM2-SU1Z RIW
R 519.22
Each
units
- - - - - - - - - - - - - -
RS stock no. 749-7688
Mfr. Part No.3SE5234-0HD03-1AC4
BrandSiemens
R 524.00
Each
units
Roller Plunger Yes NO/NC - IP65 M12 Plastic - - - 4PST 3SE5 33mm 75.7 x 31 x 33 mm
RS stock no. 621-1521
Mfr. Part No.D4N-112G
BrandOmron
R 510.53
Each
units
Roller Lever Yes NO/NC Snap IP67 Screw - - 2 - SPDT D4N 45mm 73 x 31 x 45 mm
RS stock no. 749-7580
Mfr. Part No.3SE5112-0CC02
BrandSiemens
R 645.00
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. 757-9159
Mfr. Part No.D4B4116N
BrandOmron
R 1,084.31
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. 479-3043
Mfr. Part No.XCSM3902L5
R 2,094.40
Each
units
Roller Plunger Yes NO/2NC Snap IP67, IP68 Cable Metal - 3 - - XCSM 16mm 70 x 30 x 16 mm