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 Number of Timing Ranges External Dimensions
RS Stock No. 394-9936
Mfr. Part No.LADN11
HK$91.64
Each
units
2 NO/NC TeSys Front Mount 10 A - DP Screw - - - LADN - -
RS Stock No. 394-9908
Mfr. Part No.LADN22
HK$162.17
Each
units
4 2NO/2NC TeSys Front Mount 10 A 600 V ac 4P Screw -5°C +60°C - LADN - -
RS Stock No. 791-2824
Mfr. Part No.A9A26924
HK$270.07
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. 257-3752
Mfr. Part No.VZ7
HK$120.18
Each
units
2 NO/NC - - - - DP - - - - VZ7 - -
RS Stock No. 394-9970
Mfr. Part No.LADN02
HK$65.71
Each
units
2 2NC - Front Mount - - DP Screw - - - LADN - -
RS Stock No. 394-9879
Mfr. Part No.LADN40
HK$160.95
Each
units
4 4NO TeSys Front Mount 10 A - 4P Screw - - - LADN - -
RS Stock No. 400-1445
Mfr. Part No.LADS2
HK$495.47
Each
units
2 NO/NC TeSys Front Mount 10 A 690 V - Screw -5°C +60°C -5 → +60 °C D - -
RS Stock No. 395-0144
Mfr. Part No.GVAE11
HK$83.24
Each
units
2 NO/NC TeSys Front Mount 2.5 A 60 V dc, 240 V ac DP Screw - - - GVAE - -
RS Stock No. 279-6337
Mfr. Part No.LA1KN31
HK$86.85
Each
units
4 3NO/NC - Clip On 10 A 600 V ac 4P Screw - - - LA1K - -
RS Stock No. 394-9920
Mfr. Part No.LADN13
HK$115.36
Each
units
4 NO/3NC - Front Mount - - 4P Screw - - - LADN - -
RS Stock No. 395-0150
Mfr. Part No.GVAD1010
HK$135.60
Each
units
2 2NO - Side Mount - 240 V dc, 690 V ac DP Screw - - - GVAD - -
RS Stock No. 400-1473
Mfr. Part No.LAD8N20
HK$76.84
Each
units
- 2NO - Side - - - Screw Clamp - - - LAD8 - -
RS Stock No. 776-2957
Mfr. Part No.A9N26924
HK$414.00
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. 257-3702
Mfr. Part No.VZ1
HK$94.55
Each
units
1 - - Side Mount 25 A 690 V ac SP Screw -20°C +50°C -20 → +50 °C VZ1 - -
RS Stock No. 279-6315
Mfr. Part No.LA1KN04
HK$83.00
Each
units
4 4NC - Clip On 10 A 600 V ac 4P Screw - - - LA1K - -
RS Stock No. 394-9914
Mfr. Part No.LADN20
HK$65.71
Each
units
2 2NO TeSys Front Mount 10 A - DP Screw - - - LADN - -
RS Stock No. 257-3689
Mfr. Part No.VZ01
HK$78.20
Each
units
1 - - Side Mount 16 A 690 V ac SP Screw -20°C +50°C -20 → +50 °C VZ01 - -
RS Stock No. 243-9898
Mfr. Part No.GAC0521
HK$298.62
Each
units
2 NO/NC - Clip On - - DP - - - - GAC0 - -
RS Stock No. 493-9110
HK$92.34
Each
units
2 NO/NC TeSys U Series - 5 A 24 → 250 V ac/dc - - - - - - - -
RS Stock No. 791-2852
Mfr. Part No.A9C15419
HK$540.00
Each
units
- - Acti 9 DIN Rail Mount - 12 → 48 V ac - Screw -5°C +50°C -5 → +50 °C iATET - -