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 421 - 440 of 452 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. 382-191
Mfr. Part No.LA1KN317
HK$144.71
Each
units
4 3NO/NC - Clip On - - 4P Screw - - - LA1K - -
RS Stock No. 183-3645
Mfr. Part No.359625
BrandABB
HK$322.76
Each
units
2 2NO - DIN Rail Mount 10 A 24 V ac/dc - - - - - S2C - -
New
RS Stock No. 203-2689
Mfr. Part No.3RH2911-2GA40
BrandSiemens
HK$162.99
Each
units
4 4 NO SIRIUS Snap On 10 A 17 V - - - - - 3RH2911 - -
RS Stock No. 776-1563
Mfr. Part No.022.33
BrandFinder
HK$218.16
Each
units
2 2NO - DIN Rail Mount 6 A 230 V DPST Screw - - - 22 Series - -
RS Stock No. 209-5577
Mfr. Part No.M5725104
BrandMETCASE
HK$682.17
Each
units
- - - - - - - - - - - Mettec 250 mm 250 x 250 x 85mm
RS Stock No. 121-6875
BrandRS PRO
HK$31.26
Each
units
- - - DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C MSK - -
RS Stock No. 178-8043
Mfr. Part No.229681 & NHI-E-10-PKZ0-C
BrandEaton
HK$82.76
Each
units
1 NO - Front Fastening 1 (AC) A, 2 (DC) A 250 V dc, 440 V ac 1P Spring Clamp -25°C +55°C -25 → +55 °C NHI - -
RS Stock No. 608-8983
Mfr. Part No.LA1LC010
HK$2,619.76
Each
units
6 5NO/NC - Side Mount - - 6P Screw - - - LA1L - -
RS Stock No. 209-5870
Mfr. Part No.M5735217
BrandMETCASE
HK$1,225.00
Each
units
- - - - - - - - - - - Mettec 263 mm 350 x 263 x 120mm
RS Stock No. 727-1549
Mfr. Part No.1SCA022353R4890
BrandABB
HK$85.14
Each
units
1 NC - Snap-On 6 A ac, 10 A dc 400 V dc, 690 V ac SP Screw - - - OA1G - -
RS Stock No. 223-4817
Mfr. Part No.39990701
BrandSocomec
HK$71.96
Each
units
1 NO - - 2.8 A dc, 3 A ac 48 V dc, 400 V ac SP - - - - - - -
RS Stock No. 706-0992
Mfr. Part No.3RH2911-2HA22
BrandSiemens
HK$113.14
Each
units
4 2NO/2NC Sirius Innovation Snap-On 6 A ac, 10 A dc 250 V dc, 690 V ac 4PST Cage Clamp -25°C +60°C -25 +60 °C 3RH2 - -
RS Stock No. 706-0854
Mfr. Part No.3RH2911-1AA10
BrandSiemens
HK$52.87
Each
units
1 NO Sirius Innovation Snap-On 6 A dc, 10 A ac 250 V dc, 690 V ac SPST Screw -25°C +60°C -25 +60 °C 3RH2 - -
RS Stock No. 392-7548
Mfr. Part No.3RH1911-2FA20
BrandSiemens
HK$58.52
Each
units
2 2NO Sirius Classic Snap-On - - DP Cage Clamp - - - 3RH1 - -
RS Stock No. 610-3537
Mfr. Part No.3LD9200-5C
BrandSiemens
HK$105.36
Each
units
2 NO/NC - Floor - - DP - - - - - - -
RS Stock No. 445-8093
Mfr. Part No.GHE3401321R0001
BrandABB
HK$249.51
Each
units
2 2NO - DIN Rail Mount 4 A 220 V dc, 400 V ac DP Screw -25°C +55°C -25 +55 °C ESB - -
New
RS Stock No. 203-3994
Mfr. Part No.3TY2741-2J
BrandSiemens
HK$1,164.25
Each
units
8 4 NO+4 NC - Snap On 10 A 690 V - - - - - 3TY2 - -
RS Stock No. 122-1071
Mfr. Part No.BLB-02 EN
BrandWEG
HK$86.55
Each
units
2 2NC - Side Mount 10 A 690 V ac DPST Screw - - -25 → +55 °C BLB - -
RS Stock No. 122-0939
Mfr. Part No.BFC4-04
BrandWEG
HK$100.81
Each
units
4 4NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C BFC4 - -
RS Stock No. 392-8951
Mfr. Part No.3RH1921-2CA10
BrandSiemens
HK$50.34
Each
units
1 NO Sirius Classic Snap-On - - SP Cage Clamp - - - 3RH1 - -
Related Products
From Vishay, the CRCW series consists of surface ...
Description:
From Vishay, the CRCW series consists of surface mount thick film resistors. These SMD resistors are constructed from a high quality ceramic with a metal glaze. With pure tin plated solder contacts, you can use soldering processes that either contain ...
From Vishay, the CRCW series consists of surface ...
Description:
From Vishay, the CRCW series consists of surface mount thick film resistors. These SMD resistors are constructed from a high quality ceramic with a metal glaze. With pure tin plated solder contacts, you can use soldering processes that either contain ...
Metal glaze on high quality ceramicProtective over glazeExcellent ...
Description:
Metal glaze on high quality ceramicProtective over glazeExcellent stability (ΔR/R ≤ 1 % for 1000h at 70 °C)Lead (Pb)-free solder contacts on Ni barrier layerPure tin plating provides compatibility with lead (Pb)-free and lead containing soldering processes5% version also available ...