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. 466-295
BrandRS PRO
kr 39,21
Each
Units
1 NO/NC - Panel Mount 63 A - SPDT - - - - - - -
RS Stock No. 121-6865
BrandRS PRO
kr 48,63
Each
Units
1 1NO - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C - HSV -
RS Stock No. 121-6874
BrandRS PRO
kr 32,48
Each
Units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C - MSK -
RS Stock No. 121-6866
BrandRS PRO
kr 48,63
Each
Units
1 1NC - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C - HSV -
RS Stock No. 121-6875
BrandRS PRO
kr 37,15
Each
Units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C - MSK -
RS Stock No. 121-6867
BrandRS PRO
kr 56,17
Each
Units
1 1NO - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C - HRS -
RS Stock No. 121-6870
BrandRS PRO
kr 133,43
Each
Units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C - UR -
RS Stock No. 331-3696
BrandRS PRO
kr 52,86
Each
Units
2 1NO/1NC - DIN Rail Mount - 240 V ac DP - - - - - - -
RS Stock No. 121-6871
BrandRS PRO
kr 133,43
Each
Units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C - AR -
RS Stock No. 121-6868
BrandRS PRO
kr 56,17
Each
Units
1 1NC - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C - HRS -
RS Stock No. 121-6873
BrandRS PRO
kr 30,15
Each
Units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C - MSK -
RS Stock No. 121-6872
BrandRS PRO
kr 133,43
Each
Units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C - AR -
RS Stock No. 121-6869
BrandRS PRO
kr 133,43
Each
Units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C - UR -
RS Stock No. 394-9908
Mfr. Part No.LADN22
kr 193,97
Each
Units
4 2NO/2NC TeSys Front Mount 10 A 600 V ac 4P Screw -5°C +60°C - - LADN -
RS Stock No. 394-9879
Mfr. Part No.LADN40
kr 213,97
Each
Units
4 4NO TeSys Front Mount 10 A - 4P Screw - - - - LADN -
RS Stock No. 791-2828
Mfr. Part No.A9A26929
kr 440,64
Each
Units
4 NO/NC + NO/NC Acti 9 DIN Rail Mount 2 A dc, 6 A ac 24 → 130 V dc, 240 → 415 V ac 4P Screw -35°C +70°C -35 → +70 °C - iOF -
RS Stock No. 395-0122
Mfr. Part No.GVAN11
kr 113,01
Each
Units
2 1NO/1NC TeSys Side Mount 6 A 240 V dc, 690 V ac DP Screw - - - - GVAN -
RS Stock No. 706-0850
Mfr. Part No.3RH2911-1AA01
BrandSiemens
kr 74,68
Each
Units
1 1NC Sirius Innovation Snap-On 6 A ac, 10 A dc 250 V dc, 690 V ac SPST Screw -25°C +60°C -25 → +60 °C - 3RH2 -
RS Stock No. 394-9920
Mfr. Part No.LADN13
kr 213,97
Each
Units
4 1NO/3NC - Front Mount - - 4P Screw - - - - LADN -
RS Stock No. 791-2837
Mfr. Part No.A9A26927
kr 401,24
Each
Units
1 1CO Acti 9 DIN Rail Mount 2 A dc, 6 A ac 24 → 130 V dc, 240 → 415 V ac DP Screw -35°C +70°C -35 → +70 °C - iSD -