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 61 - 80 of 497 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 External Width External Dimensions
RS Stock No. 122-0944
Mfr. Part No.BFC4-31
BrandWEG
TWD483.00
Each
units
4 3NO/1NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C BFC4 - -
RS Stock No. 136-3684
BrandSiemens
TWD645.00
Each
units
4 2NO/2NC Sirius Innovation Snap-On 10 A 600 V dc, 690 V ac 4PST Screw -25°C +60°C -25 → +60 °C 3RH29 - -
RS Stock No. 610-3537
Mfr. Part No.3LD9200-5C
BrandSiemens
TWD593.00
Each
units
2 NO/NC - Floor - - DP - - - - - - -
RS Stock No. 493-9126
Mfr. Part No.LUFN20
TWD979.00
Each
units
2 2NO TeSys U Series - 5 A 24 → 250 V ac/dc - - - - - - - -
RS Stock No. 746-0800
Mfr. Part No.3RH2921-1DA11
BrandSiemens
TWD577.00
Each
units
2 NO/NC Sirius Innovation Lateral 10 A 600 V dc, 690 V ac DP Screw - - -25 → +60 °C 3RH2 - -
RS Stock No. 711-6339
Mfr. Part No.1SBN010151R1011 CAT4-11E
BrandABB
TWD424.00
Each
units
2 NO/NC - Front Mount 6 A 600 V dc, 690 V ac DP Screw - - - CAT4 - -
RS Stock No. 178-8041
Mfr. Part No.072895 & NHI12-PKZ0
BrandEaton
TWD766.00
Each
units
3 1NO/2NC - Side Mount 2 A dc, 3.5 A ac 250 V dc, 500 V ac 3P Screw -25°C +55°C -25 → +55 °C NHI12 - -
New
RS Stock No. 211-2550
Mfr. Part No.LA1DX11
TWD2,296.00
Each
units
- 1 NO (sealed) + 1 NC (sealed) TeSys D DIN - 125 V - - - - - LA1D - -
RS Stock No. 916-0261
Mfr. Part No.EUCA11
BrandEuropa
TWD383.00
Each
units
1 1CO - DIN Rail Mount 6 A 130 V dc, 400 V ac SPCO Screw - - - - - -
New
RS Stock No. 212-5837
Mfr. Part No.3LD9340-6C
BrandSiemens
TWD505.00
Each
units
2 1 NO + 1 NC SENTRON Floor mounting - - - - - - - 3LD - -
New
RS Stock No. 214-6837
Mfr. Part No.J77MN-20F
BrandOmron
TWD299.00
Each
units
2 2NO - - 2 A 240 V - - - - - J77MN - -
RS Stock No. 706-0908
Mfr. Part No.3RH2911-1HA03
BrandSiemens
TWD521.00
Each
units
3 3NC Sirius Innovation Snap-On 6 A dc, 10 A ac 250 V dc, 690 V ac 3PST Screw -25°C +60°C -25 → +60 °C - - -
RS Stock No. 758-484
Mfr. Part No.K2 H010/A11-VE
TWD588.00
Each
units
2 NO/NC - Side Mount 80 A, 100 A - DP - - - - - - -
RS Stock No. 482-487
Mfr. Part No.DF22AM1
TWD379.00
Each
units
1 - - DIN Rail Mount 125 A - SP - - - - DF22 - -
New
RS Stock No. 211-2681
Mfr. Part No.VZN12
TWD288.00
Each
units
1 1 NO TeSys - - 690 V - - - - - VZN - -
New
RS Stock No. 216-6031
Mfr. Part No.GAC0511
TWD903.00
Each
units
1 1 C/O TeSys DIN 5 A 250 V - - - - - GAC0 - -
RS Stock No. 203-2080
Mfr. Part No.3RH1921-2DA11
BrandSiemens
TWD545.00
Each
units
2 1NO/1NC SIRIUS Snap-On 10 A 17 V dc - - - - - 3RH1921 - -
RS Stock No. 121-6873
BrandRS PRO
TWD99.00
Each
units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C MSK - -
RS Stock No. 608-9009
Mfr. Part No.LA1LC025
TWD6,622.00
Each
units
4 2NO/2NC, 3NO/NC - Side Mount - - 4P Screw - - - LA1L - -
RS Stock No. 178-8011
Mfr. Part No.139580 & DILA-XHIR22
BrandEaton
TWD1,221.00
Each
units
4 2NO/2NC - Front Mount 4 A ac, 10 A dc 220 V dc, 500 V ac 4P Screw -25°C +60°C -25 → +60 °C DILA - -