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. 410-7414
Mfr. Part No.I88-SU1Z HW
€28.26
Each
units
Roller Lever 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. 766-1728
Mfr. Part No.XCSM4110L1
€57.26
Each
units
Plunger Yes 2NO/2NC Snap - Cable Metal - 4 - 4P XCSM 16mm 60 x 30 x 16 mm
RS Stock No. 302-0007
Mfr. Part No.XCLJ561H29
€66.32
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. 836-2747
Mfr. Part No.D4N1A62
BrandOmron
€23.27
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. 410-7234
Mfr. Part No.C2-U1Z ST.
€15.73
Each
units
Plunger 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. 410-6865
Mfr. Part No.C2-A2Z R
€19.15
Each
units
Roller Tappet Yes 2NC Slow IP20 Screw Fibreglass 1 2 8.5 x 3.5 mm - C2 21mm 44 x 26 x 21 mm
RS Stock No. 410-7329
Mfr. Part No.I88-U1 AV
€37.36
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. 410-7436
Mfr. Part No.I88-SU1Z AH
€35.60
Each
units
Spindle 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. 769-6273
Mfr. Part No.3SE5132-0CJ01
BrandSiemens
€36.65
Each
units
Twist Lever Yes NO/NC Snap - Screw Plastic 1 2 M20 x 1.5 - 3SE5 78mm 40.5 x 37.3 x 78 mm
RS Stock No. 755-7862
Mfr. Part No.3SE5413-0CC22-1EA2
BrandSiemens
€49.35
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. 766-1725
Mfr. Part No.XCSM4102L1
€61.91
Each
units
Roller Plunger Yes 2NO/2NC Snap - Cable Metal - 4 - 4P XCSM 16mm 70 x 30 x 16 mm
RS Stock No. 749-7565
Mfr. Part No.3SE5112-0BE01
BrandSiemens
€45.51
Each
units
Roller Lever Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
RS Stock No. 410-7357
Mfr. Part No.I88-U1Z W
€20.29
Each
units
Radius 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. 746-7233
Mfr. Part No.D4N-1A2G
BrandOmron
€31.42
Each
units
Roller Lever Yes NO/NC Slow - Screw - - 2 PG13.5 DPST D4N 45mm 64 x 31 x 45 mm
RS Stock No. 755-7887
Mfr. Part No.3SE5413-0CN20-1EB1
BrandSiemens
€51.42
Each
units
Twist Lever Yes NO/NC Snap - M12 - - 2 - DPST 3SE5 16.2mm 50 x 30 x 16.2 mm
RS Stock No. 769-6276
Mfr. Part No.3SE5132-0CE05
BrandSiemens
€34.26
Each
units
Roller Lever Yes NO/NC Snap - Screw Plastic 1 2 M20 x 1.5 - 3SE5 78mm 40.5 x 37.3 x 78 mm
RS Stock No. 766-1719
Mfr. Part No.XCSM3910L1
€50.90
Each
units
Plunger Yes NO/2NC Snap - Cable Metal - 3 - 3P XCSM 16mm 60 x 30 x 16 mm
RS Stock No. 873-2229
Mfr. Part No.440P-MRPB13B
€52.13
Each
units
Roller Plunger Yes NO/NC Slow IP66 M20 Metal - 4 - 4PST 440P 43mm 118 x 40 x 43 mm
RS Stock No. 258-8108
Mfr. Part No.GSAC01D
BrandHoneywell
€93.90
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. 749-7593
Mfr. Part No.3SE5112-0CR01
BrandSiemens
€43.99
Each
units
Spring Rod Yes NO/NC - IP66, IP67 Screw Metal - - - DPST 3SE5 37.3mm 85.7 x 40.5 x 37.3 mm
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