Auxiliary Contacts

Contacts are the conductive pieces of material that form part of an electrically controlled switch. Auxiliary contacts form part of a contactor, which is a type of switch that can be controlled remotely.

Contactors are often used in very high-power circuits, and auxiliary contacts are the last phase of contact, used to reduce the power of the current. They have a lower current rating than regular power contacts, and can be used to de-energise the contactor.

How do auxiliary contacts work?

Auxiliary contacts are affixed to the main contacts and change state when the main contacts do. They pass the data from the circuit to a logic controller, which in turn gives instructions to the linked devices about whether to turn on or off.

Alternatively, they can be used as a standalone hardware control unit.

What are auxiliary contacts used for?

One common usage of auxiliary contacts is in push button controllers, where they can be built in to the start button.


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Description Price Number of Contacts Normal State Configuration Range Mounting Style Contact Current Rating Contact Voltage Rating Pole and Throw Configuration Terminal Type Minimum Operating Temperature Maximum Operating Temperature Operating Temperature Range CAD Drawing Series External Width
RS Stock No. 351-5628
Mfr. Part No.140M-C-AFAR10A01
kr 169,47
Each
Units
2 1NO/1NC - Front Mount - - DPST Screw - - - - 140 -
RS Stock No. 502-284
Mfr. Part No.100-KFA13E
kr 145,55
Each
Units
4 1NO/3NC - Snap-On - - 4PST Screw - - - - 100K -
RS Stock No. 502-313
Mfr. Part No.100-KFA04E
kr 145,55
Each
Units
4 4NC - Snap-On - - 4PST Screw - - - - 100K -
RS Stock No. 443-0843
Mfr. Part No.194E-A16-PD10
kr 125,61
Each
Units
1 1NO - Side Mount 16 A 17 V dc SP - -20°C +55°C -20 → +55 °C - 194 -
RS Stock No. 351-5656
Mfr. Part No.140M-C-ASAR01M10
kr 254,21
Each
Units
2 1NO/1NC - Side Mount - - DP - - - - - 140 -
RS Stock No. 502-317
Mfr. Part No.100-KFA02E
kr 79,05
Each
Units
2 2NC - Snap-On - - DPST Screw - - - - 100K -
RS Stock No. 261-8136
Mfr. Part No.194E-A-P22
kr 252,22
Each
Units
4 2NO/2NC - Side Mount 6 A 17 V dc 4P - -20°C +55°C -20 → +55 °C - 194 -
RS Stock No. 238-1058
Mfr. Part No.100-FA02
kr 88,72
Each
Units
2 2NC - Front Mount 10 A - DPST Screw - - - - 100F -
RS Stock No. 238-1121
Mfr. Part No.100-SB11
kr 119,63
Each
Units
2 1NO/1NC - Side Mount 10 A - SPST Screw - - - - 100S -
RS Stock No. 238-1092
Mfr. Part No.100-FA40
kr 160,50
Each
Units
4 4NO - Front Mount 10 A - 4PST Screw - - - - 100F -
RS Stock No. 502-193
Mfr. Part No.100-KFA31Z
kr 145,55
Each
Units
4 3NO/1NC - Snap-On - - 4PST Screw - - - - 100K -
RS Stock No. 502-171
Mfr. Part No.100-KFC11
kr 79,05
Each
Units
2 1NO/1NC - Snap-On 12 A - DPST Screw - - - - 100K -
RS Stock No. 502-288
Mfr. Part No.100-KFA11E
kr 79,05
Each
Units
2 1NO/1NC - Snap-On - - DPST Screw - - - - 100K -
RS Stock No. 443-0859
Mfr. Part No.194E-E16-PD10
kr 125,61
Each
Units
1 1NO - Side Mount 16 A 17 V dc SP - -20°C +55°C -20 → +55 °C - 194 -
RS Stock No. 422-9283
Mfr. Part No.194E-E-P11
kr 125,61
Each
Units
2 1NO/1NC - Side Mount 10 A 8 V dc DP - -20°C +55°C -20 → +55 °C - 194 -
RS Stock No. 502-199
Mfr. Part No.100-KFA22Z
kr 145,55
Each
Units
4 2NO/2NC - Snap-On - - 4PST Screw - - - - 100K -
RS Stock No. 502-240
Mfr. Part No.100-KFA40E
kr 145,55
Each
Units
4 4NO - Snap-On - - 4PST Screw - - - - 100K -
RS Stock No. 422-9299
Mfr. Part No.194E-A-P11
kr 125,61
Each
Units
2 1NO/1NC - Side Mount 6 A 17 V dc DP - -20°C +55°C -20 → +55 °C - 194 -
RS Stock No. 351-5561
Mfr. Part No.140M-C-AFA11
kr 106,67
Each
Units
2 1NO/1NC - Front Mount - - DPST Screw - - - - 140 -
RS Stock No. 502-452
Mfr. Part No.100-KFC22
kr 145,55
Each
Units
4 2NO/2NC - Snap-On 12 A - 4PST Screw - - - - 100K -