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. 445-8021
Mfr. Part No.1SBN010010R1001
BrandABB
$6.68
Each
units
1 NC - Front Mount - - SP Screw - - - CA5 - -
RS Stock No. 482-4434
Mfr. Part No.1SCA022353R4970
BrandABB
$14.73
Each
units
1 NO - - - - - - - - - - - -
RS Stock No. 711-6317
Mfr. Part No.1SBN010110R1010
BrandABB
$8.89
Each
units
1 NO - Front Mount 6 A 600 V dc, 690 V ac SP Screw - - - CA4 - -
RS Stock No. 488-6448
Mfr. Part No.S2C-S/H6R
BrandABB
$62.24
Each
units
2 NO/NC - Side Mount 1.5 A dc, 6 A ac 110 V dc, 240 V ac DP Screw - - - S2C - -
RS Stock No. 445-8273
Mfr. Part No.CAF6-20M
BrandABB
$15.12
Each
units
2 2NO - Front Mount - 240 V dc, 500 V ac DP Screw - - - CAF6 - -
RS Stock No. 445-8043
Mfr. Part No.1SBN010040R1122 - CA5-22M
BrandABB
$32.85
Each
units
4 2NO/2NC - Front Mount 6 A 24 V dc, 230 V ac 4P Screw - - - CA5 - -
RS Stock No. 445-0415
Mfr. Part No.1SAM201901R1001
BrandABB
$21.93
Each
units
2 NO/NC - Front Mount 1 A dc, 3 A ac 220 V dc, 230 V ac DP - - - - HK1 - -
RS Stock No. 831-9191
Mfr. Part No.1SDA066423R1
BrandABB
$32.87
Each
units
1 CO - - - 24 V dc - - - - - XT1 - -
RS Stock No. 512-9516
Mfr. Part No.OA3G01
BrandABB
$15.27
Each
units
- - - - - - - - - - - - - -
RS Stock No. 711-6329
Mfr. Part No.1SBN010110R1001
BrandABB
$9.76
Each
units
1 NC - Front Mount 6 A 600 V dc, 690 V ac SP Screw - - - CA4 - -
RS Stock No. 488-7384
Mfr. Part No.2CDS200912R0001
BrandABB
$36.78
Each
units
2 NO/NC - Side Mount - - DP Screw - - - - - -
RS Stock No. 455-5829
Mfr. Part No.GHS2701916R0001 - S2-H11
BrandABB
$30.84
Each
units
2 NO/NC - Side Mount 4 A dc, 6 A ac 24 V dc, 230 V ac DP - - - - HSMS - -
RS Stock No. 456-0253
Mfr. Part No.1SBN010020R1011
BrandABB
$20.09
Each
units
2 NO/NC - Side Mount - - DP Screw - - - CAL5 - -
RS Stock No. 711-6348
Mfr. Part No.CAT4-11M
BrandABB
$15.36
Each
units
2 NO/NC - Front Mount 6 A 600 V dc, 690 V ac DP Screw -40°C +70°C -40 → +70 °C CAT4 - -
RS Stock No. 445-0421
Mfr. Part No.1SAM201902R1001
BrandABB
$17.00
Each
units
2 NO/NC - Side Mount 2 A dc, 6 A ac 220 V dc, 400 V ac DP - - - - HK1 - -
RS Stock No. 711-6310
Mfr. Part No.1SBN010120R1011
BrandABB
$22.33
Each
units
2 NO/NC - Side Mount 6 A 600 V dc, 690 V ac DP Screw -40°C +70°C -40 → +70 °C CAL4-11 - -
RS Stock No. 727-1549
Mfr. Part No.1SCA022353R4890
BrandABB
$14.33
Each
units
1 NC - Snap-On 6 A ac, 10 A dc 400 V dc, 690 V ac SP Screw - - - OA1G - -
RS Stock No. 711-6367
Mfr. Part No.CA4-13M
BrandABB
$24.87
Each
units
4 NO/3NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw -40°C +70°C -40 → +70 °C CA4 - -
RS Stock No. 460-1506
Mfr. Part No.GHS2701916R0003 - S2-H02
BrandABB
$29.19
Each
units
2 2NC - Side Mount 4 A dc, 6 A ac 24 V dc, 230 V ac DP - - - - HSMS - -
RS Stock No. 614-0845
Mfr. Part No.2CDS200970R0001
BrandABB
$26.51
Each
units
1 NC - - 2 A 50 V dc, 230 V ac SP - - - - - - -