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 1 - 20 of 444 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. 121-6871
BrandRS PRO
$18.93
Each
units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C AR - -
RS Stock No. 121-6867
BrandRS PRO
$9.15
Each
units
1 NO - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C HRS - -
RS Stock No. 121-6865
BrandRS PRO
$7.54
Each
units
1 NO - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C HSV - -
RS Stock No. 121-6875
BrandRS PRO
$4.76
Each
units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C MSK - -
RS Stock No. 121-6873
BrandRS PRO
$3.94
Each
units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C MSK - -
RS Stock No. 121-6874
BrandRS PRO
$4.18
Each
units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C MSK - -
RS Stock No. 121-6870
BrandRS PRO
$17.08
Each
units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C UR - -
RS Stock No. 121-6866
BrandRS PRO
$6.78
Each
units
1 NC - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C HSV - -
RS Stock No. 466-295
BrandRS PRO
$6.13
Each
units
1 NO/NC - Panel Mount 63 A - SPDT - - - - - - -
RS Stock No. 121-6872
BrandRS PRO
$19.03
Each
units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C AR - -
RS Stock No. 121-6869
BrandRS PRO
$17.33
Each
units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C UR - -
RS Stock No. 331-3696
BrandRS PRO
$25.91
Each
units
2 NO/NC - DIN Rail Mount - 240 V ac DP - - - - - - -
RS Stock No. 121-6868
BrandRS PRO
$7.63
Each
units
1 NC - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C HRS - -
RS Stock No. 706-0905
Mfr. Part No.3RH2911-1HA11
BrandSiemens
$28.39
Each
units
2 NO/NC Sirius Innovation Snap-On 6 A dc, 10 A ac 250 V dc, 690 V ac DPST Screw -25°C +60°C -25 → +60 °C 3RH2 - -
RS Stock No. 758-478
Mfr. Part No.K1 H010/A11-VE
$45.71
Each
units
2 NO/NC - - 40 A, 63 A - DP - - - - - - -
RS Stock No. 209-5785
Mfr. Part No.M5735204
BrandMETCASE
$212.06
Each
units
- - - - - - - - - - - Mettec - 350 x 250 x 120mm
RS Stock No. 800-7286
Mfr. Part No.1SFN010820R1011
BrandABB
$40.65
Each
units
4 NC, NO - Side Mount 6 A 690 V ac DP Screw - - - CAL19 - -
RS Stock No. 751-5751
Mfr. Part No.3RT1926-2FJ31
BrandSiemens
$155.81
Each
units
2 NO/NC Sirius Classic - 20 mA - - Screw -25°C +60°C -25 → +60 °C 3RT1 - -
RS Stock No. 521-4579
Mfr. Part No.5ST3010
BrandSiemens
$51.35
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. 800-7295
Mfr. Part No.1SFN010820R3311
BrandABB
$40.69
Each
units
4 NC, NO - Side Mount 6 A 690 V ac DP Screw - - - CAL19 - -
Related Products
Are you looking to provide an additional auxiliary ...
Description:
Are you looking to provide an additional auxiliary contact to your control circuit, to provide further safety? Schneider Electric offers the latest in Auxiliary Contact components and technology.Specifically, the LA1K series of Auxiliary Contactor brings reliability to your circuit by ...
Professional range of M32 series connection blocks. The ...
Description:
Professional range of M32 series connection blocks. The blocks are designed to join a motor protection switch with a connector forming a single unit starter.
Siemens range of auxiliary contact bloacks to suit ...
Description:
Siemens range of auxiliary contact bloacks to suit the 3RH contactors. Front mounting positionCurrent rating; 6AAccepts cables up to 2 x 2.5mm21 x block per contactor, 1 x block per relay.
One block can be fitted to each side ...
Description:
One block can be fitted to each side of the deviceFor signalling the ’ON’ or ’OFF’ switch positionsWith 1 NO + 1NC contactsRated voltage 240Vac.