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 Dimensions
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. 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. 394-9879
Mfr. Part No.LADN40
kr 213,97
Each
Units
4 4NO TeSys Front Mount 10 A - 4P Screw - - - - LADN -
RS Stock No. 395-0122
Mfr. Part No.GVAN11
kr 113,01
Each
Units
2 NO/NC 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 NC 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. 513-0229
Mfr. Part No.DILM150-XHI22
BrandEaton
kr 102,55
Each
Units
4 2NO/2NC - Front Mount 4 A ac, 10 A dc 220 V dc, 500 V ac 4PST Screw - - - - DILM -
RS Stock No. 791-2837
Mfr. Part No.A9A26927
kr 401,24
Each
Units
2 NO/NC 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 -
RS Stock No. 685-1504
Mfr. Part No.BFX1011
BrandLovato
kr 54,79
Each
Units
2 NO/NC - Snap-On - - - Screw - - - - - -
RS Stock No. 395-0144
Mfr. Part No.GVAE11
kr 110,68
Each
Units
2 NO/NC TeSys Front Mount 2.5 A 60 V dc, 240 V ac DP Screw - - - - GVAE -
RS Stock No. 394-9920
Mfr. Part No.LADN13
kr 213,97
Each
Units
4 NO/3NC - Front Mount - - 4P Screw - - - - LADN -
RS Stock No. 488-6448
Mfr. Part No.S2C-S/H6R
BrandABB
kr 203,69
Each
Units
2 NO/NC - Side Mount 1.5 A dc, 6 A ac 110 V dc, 240 V ac DP Screw - - - - S2C -
RS Stock No. 759-055
Mfr. Part No.LA1KN22
kr 142,30
Each
Units
4 2NO/2NC TeSys Clip On 10 A 600 V ac 4P Screw - - -25 → 50 °C - LA1K -
RS Stock No. 394-9936
Mfr. Part No.LADN11
kr 121,82
Each
Units
2 NO/NC TeSys Front Mount 10 A - DP Screw - - -5 +60 °C - LADN -
RS Stock No. 319-691
Mfr. Part No.K0 H010/A11-VE
kr 96,78
Each
Units
2 NO/NC - - 25 A, 32 A - DP - - - - - - -
RS Stock No. 209-5741
Mfr. Part No.M5725204
BrandMETCASE
kr 935,34
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 209-5713
Mfr. Part No.M5723204
BrandMETCASE
kr 824,42
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 791-2824
Mfr. Part No.A9A26924
kr 393,85
Each
Units
1 NO/NC Acti 9 DIN Rail Mount 2 A dc, 6 A ac 24 130 V dc, 240 415 V ac SPCO Screw -35°C +70°C -35 +70 °C - iOF -
RS Stock No. 394-9970
Mfr. Part No.LADN02
kr 120,79
Each
Units
2 2NC - Front Mount - - DP Screw - - - - LADN -
RS Stock No. 818-277
Mfr. Part No.NHI11-PKZ0
BrandEaton
kr 74,45
Each
Units
2 NO/NC - Side Mount 2 A dc, 3.5 A ac 220 V dc, 500 V ac DPST Screw - - - - - -
RS Stock No. 445-0421
Mfr. Part No.1SAM201902R1001
BrandABB
kr 96,91
Each
Units
2 NO/NC - Side Mount 2 A dc, 6 A ac 220 V dc, 400 V ac DP - - - - - HK1 -
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