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 138 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. 246-5061
Mfr. Part No.3RV1901-1A
BrandSiemens
PHP573.51
Each
units
2 NO/NC Sirius Classic Side Mount 2 A 24 V ac DP Screw - +60°C Maximum of +60 °C 3RV1 - -
RS Stock No. 392-8967
Mfr. Part No.3RH1921-1CA10
BrandSiemens
PHP258.66
Each
units
1 NO Sirius Classic Snap-On - - SP Screw - - - 3RH1 - -
RS Stock No. 243-7533
Mfr. Part No.3RH1911-1FA22
BrandSiemens
PHP649.95
Each
units
4 2NO/2NC Sirius Classic Snap-On 6 A - 4P Screw - - - 3RH1 - -
RS Stock No. 243-7202
Mfr. Part No.3RV1901-1D
BrandSiemens
PHP405.26
Each
units
1 NO/NC Sirius Classic Front Mount 2 A 24 V ac SPDT Screw - +60°C Maximum of +60 °C 3RV1 - -
RS Stock No. 706-1894
Mfr. Part No.3RV2901-1D
BrandSiemens
PHP377.35
Each
units
1 NO/NC Sirius Innovation Plug In 1 A dc, 10 A ac 250 V dc, 690 V ac SPDT Screw -20°C +60°C -20 → +60 °C 3RV2 - -
RS Stock No. 521-4585
Mfr. Part No.5ST3011
BrandSiemens
PHP1,322.08
Each
units
2 2NO Sentron DIN Rail Mount 6 A 230 V ac DP Screw -5°C +40°C -5 → +40 °C 5ST3 - -
RS Stock No. 246-5055
Mfr. Part No.3RV1901-1E
BrandSiemens
PHP573.51
Each
units
2 NO/NC Sirius Classic Front Mount - - DP Screw - - - 3RV1 - -
RS Stock No. 521-4579
Mfr. Part No.5ST3010
BrandSiemens
PHP1,243.97
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. 246-4507
Mfr. Part No.3RH1921-1FA22
BrandSiemens
PHP535.06
Each
units
4 2NO/2NC - Front Mount 6 A - 4P Screw - - - 3RH1 - -
RS Stock No. 706-1888
Mfr. Part No.3RV2901-1A
BrandSiemens
PHP450.49
Each
units
2 NO/NC Sirius Innovation Plug In 2 A dc, 10 A ac 250 V dc, 690 V ac DP Screw -20°C +60°C -20 → +60 °C 3RV2 - -
RS Stock No. 314-286
Mfr. Part No.3TX4010-2A
BrandSiemens
PHP300.72
Each
units
1 NO - Plug In 6 A - SP - - - - 3TX4 - -
RS Stock No. 314-292
Mfr. Part No.3TX4001-2A
BrandSiemens
PHP302.53
Each
units
1 NC - Plug In 6 A - SP - - - - 3TX4 - -
RS Stock No. 246-4490
Mfr. Part No.3RH1921-1FA40
BrandSiemens
PHP603.84
Each
units
4 4NO Sirius Classic Front Mount 6 A - 4P Screw - - - 3RH1 - -
RS Stock No. 246-4529
Mfr. Part No.3RH1921-1FA31
BrandSiemens
PHP574.72
Each
units
4 3NO/NC Sirius Classic Front Mount 6 A - 4P Screw - - - 3RH1 - -
RS Stock No. 392-8973
Mfr. Part No.3RH1921-1CA01
BrandSiemens
PHP267.74
Each
units
1 NC Sirius Classic Snap-On - - SP Screw - - - 3RH1 - -
RS Stock No. 521-4591
Mfr. Part No.5ST3012
BrandSiemens
PHP1,321.18
Each
units
2 2NC Sentron DIN Rail Mount 6 A 230 V ac DP Screw -5°C +40°C -5 → +40 °C 5ST3 - -
RS Stock No. 746-0796
Mfr. Part No.3RH2911-1GA22
BrandSiemens
PHP699.79
Each
units
4 2NO/2NC Sirius Innovation Snap Front 10 A 600 V dc, 690 V ac 4P Screw - - -25 → +60 °C 3RH2 - -
RS Stock No. 243-7511
Mfr. Part No.3RH1911-1FA20
BrandSiemens
PHP350.66
Each
units
2 2NO Sirius Classic Snap-On 6 A - DP Screw - - - 3RH1 - -
RS Stock No. 746-0705
Mfr. Part No.3RH1921-1HA22
BrandSiemens
PHP645.05
Each
units
4 2NO/2NC Sirius Classic Snap Front - - 4P Screw - - - 3RH1 - -
RS Stock No. 746-0702
Mfr. Part No.3RH1921-1HA13
BrandSiemens
PHP632.81
Each
units
4 NO/3NC Sirius Classic Snap Front - - 4P Screw - - - 3RH1 - -