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.


...
Read more Read less

Filters

Viewing 121 - 140 of 580 products
Results per page
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. 445-0415
Mfr. Part No.1SAM201901R1001
BrandABB
£8.99
Each
Units
2 NO/NC - Front Mount 1 A dc, 3 A ac 220 V dc, 230 V ac DP - - - - HK1 - -
RS Stock No. 279-6315
Mfr. Part No.LA1KN04
£11.60
Each
Units
4 4NC - Clip On 10 A 600 V ac 4P Screw - - - LA1K - -
RS Stock No. 685-1517
Mfr. Part No.BFX1022
BrandLovato
£10.13
Each
Units
4 2NO/2NC - Snap-On - - - Screw - - - - - -
RS Stock No. 746-0709
Mfr. Part No.3RH1921-1HA31
BrandSiemens
£8.77
Each
Units
4 3NO/NC Sirius Classic Snap Front - - 4P Screw - - - 3RH1 - -
RS Stock No. 706-0891
Mfr. Part No.3RH2911-1FC22
BrandSiemens
£15.36
Each
Units
4 2NO/2NC Sirius Innovation Snap-On 6 A dc, 10 A ac 250 V dc, 690 V ac 4PST Screw -25°C +60°C -25 → +60 °C 3RH2 - -
RS Stock No. 351-5549
Mfr. Part No.140M-C-AFA10
£5.73
Each
Units
1 NO - Front Mount - - SPST Screw - - - 140 - -
RS Stock No. 395-0188
Mfr. Part No.GVAD0101
£13.87
Each
Units
2 2NC - Side Mount - 240 V dc, 690 V ac DP Screw - - - GVAD - -
RS Stock No. 493-0668
Mfr. Part No.DILA-XHI11
BrandEaton
£6.13
Each
Units
2 NO/NC - Front Mount 4 A ac, 10 A dc 220 V dc, 500 V ac DPST Screw - - - DILA - -
RS Stock No. 238-1036
Mfr. Part No.100-FA20
£9.56
Each
Units
2 2NO - Front Mount 10 A - DPST Screw - - - 100F - -
RS Stock No. 467-5490
Mfr. Part No.1SDA051370R1
BrandABB
£47.46
Each
Units
1 NO/NC - - - - SPDT - - - - TMAX - -
RS Stock No. 351-5612
Mfr. Part No.140M-C-AFAR10A10
£10.80
Each
Units
2 NO/NC - Front Mount - - DPST Screw - - - 140 - -
RS Stock No. 272-864
Mfr. Part No.GVAED101
£11.80
Each
Units
2 2NO - Front Mount - - DP - - - - GVAE - -
RS Stock No. 608-8775
Mfr. Part No.GV7AC01
£33.33
Each
Units
- - - - - - - - - - - GV7A - -
RS Stock No. 512-9516
Mfr. Part No.OA3G01
BrandABB
£7.82
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 759-033
Mfr. Part No.LA1KN02
£6.69
Each
Units
2 2NC - Clip On 10 A 600 V ac DP Screw - - - LA1K - -
RS Stock No. 714-1795
Mfr. Part No.SSP25/RS
£5.93
Each
Units
- - - Side Mount 25 A 690 V - Screw - - - - - -
RS Stock No. 392-7598
Mfr. Part No.3RH1921-2FA22
BrandSiemens
£8.77
Each
Units
4 2NO/2NC Sirius Classic Snap-On - - 4P Cage Clamp - - - 3RH1 - -
RS Stock No. 758-484
Mfr. Part No.K2 H010/A11-VE
£12.88
Each
Units
2 NO/NC - Side Mount 80 A, 100 A - DP - - - - - - -
RS Stock No. 608-8781
Mfr. Part No.GV7AE11
£24.46
Each
Units
1 NO/NC - - - 250 V dc, 690 V ac SPDT Screw - - - GV7A - -
RS Stock No. 800-7295
Mfr. Part No.1SFN010820R3311
BrandABB
£20.04
Each
Units
4 NC, NO - Side Mount 6 A 690 V ac DP Screw - - - CAL19 - -
Related Products
Professional range of Schneider Electric auxiliary switches. All ...
Description:
Professional range of Schneider Electric auxiliary switches. All the auxiliaries can be DIN Rail mounted. Typical applications include bank cash machines, cold storage rooms, lifts and public lighting. Single, Double or 4 Pole versionsDIN Rail mountInstantaneous break time.
Professional range of front auxiliary contact blocks from ...
Description:
Professional range of front auxiliary contact blocks from the ACBF series. The blocks come with NO and NC contacts. Designed for use with the MPW range of contactors.
Professional range of left side auxiliary contact blocks ...
Description:
Professional range of left side auxiliary contact blocks from the ACBS series. The blocks come with NO and NC contacts. Designed for use with the MPW range of contactors.
Professional range of WEG front-mounted auxiliary contact blocks ...
Description:
Professional range of WEG front-mounted auxiliary contact blocks from the BFC series. The blocks are for use with the CWCA series of contactors. Various combinations of auxiliary contacts are available.