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 Series External Width External Dimensions
RS Stock No. 791-2824
Mfr. Part No.A9A26924
SGD63.05
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. 394-9908
Mfr. Part No.LADN22
SGD26.91
Each
units
4 2NO/2NC TeSys Front Mount 10 A 600 V ac 4P Screw -5°C +60°C - LADN - -
RS Stock No. 395-0144
Mfr. Part No.GVAE11
SGD13.22
Each
units
2 NO/NC TeSys Front Mount 2.5 A 60 V dc, 240 V ac DP Screw - - - GVAE - -
RS Stock No. 791-2837
Mfr. Part No.A9A26927
SGD65.08
Each
units
1 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. 394-9936
Mfr. Part No.LADN11
SGD17.33
Each
units
2 NO/NC TeSys Front Mount 10 A - DP Screw - - -5 → +60 °C LADN - -
RS Stock No. 395-0122
Mfr. Part No.GVAN11
SGD54.84
Each
units
2 NO/NC TeSys Side Mount 6 A 240 V dc, 690 V ac DP Screw - - - GVAN - -
RS Stock No. 395-0352
Mfr. Part No.GV2AF3
SGD9.26
Each
units
- - - - - - - - - - - GV2A - -
RS Stock No. 394-9885
Mfr. Part No.LADN31
SGD28.84
Each
units
4 3NO/NC TeSys Front Mount 10 A - 4P Screw -5°C +60°C - LADN - -
RS Stock No. 513-0184
Mfr. Part No.277946 & DILM150-XHI11
BrandEaton
SGD13.76
Each
units
2 NO/NC - Front Mount 4 A ac, 10 A dc 220 V dc, 500 V ac DPST Screw -25°C +60°C -25 → +60 °C DILM - -
RS Stock No. 521-4579
Mfr. Part No.5ST3010
BrandSiemens
SGD64.90
Each
units
2 NO/NC Sentron DIN Rail Mount 6 A 230 V ac DP Screw -5°C +40°C -5 → +40 °C 5ST3 - -
RS Stock No. 874-4537
Mfr. Part No.3VA9988-0AA12
BrandSiemens
SGD45.67
Each
units
3 4NO/2NC Sentron Side Mount 6 A - - Screw - - - 3VA - -
RS Stock No. 445-0415
Mfr. Part No.1SAM201901R1001
BrandABB
SGD21.67
Each
units
2 NO/NC - Front Mount 1 A dc, 3 A ac 220 V dc, 230 V ac DP - - - - HK1 - -
RS Stock No. 394-9879
Mfr. Part No.LADN40
SGD27.43
Each
units
4 4NO TeSys Front Mount 10 A - 4P Screw - - - LADN - -
RS Stock No. 467-5490
Mfr. Part No.1SDA051370R1
BrandABB
SGD106.19
Each
units
1 NO/NC - - - - SPDT - - - - TMAX - -
RS Stock No. 866-1495
Mfr. Part No.290615 & XTCEXSBN11
BrandEaton
SGD47.33
Each
units
2 1NO/1NC - Side Mount 10 A - DPDT Screw - +50°C - - - -
RS Stock No. 818-277
Mfr. Part No.072896 & NHI11-PKZ0
BrandEaton
SGD23.09
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. 493-0652
Mfr. Part No.277377 & DILM32-XHI22
BrandEaton
SGD20.90
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. 776-2957
Mfr. Part No.A9N26924
SGD63.36
Each
units
1 CO Acti 9 DIN Rail Mount 6 A ac, 6 A dc 130 V dc, 415 V ac SPDT Clamp -35°C +70°C -35 → +70 °C iC60 - -
RS Stock No. 706-0920
Mfr. Part No.3RH2911-1HA21
BrandSiemens
SGD14.71
Each
units
3 2NO/NC Sirius Innovation Snap-On 6 A ac, 10 A dc 250 V dc, 690 V ac 3PST Screw -25°C +60°C -25 → +60 °C - - -
RS Stock No. 394-9970
Mfr. Part No.LADN02
SGD17.12
Each
units
2 2NC - Front Mount - - DP Screw - - - LADN - -