Auxiliary Contacts | Auxiliary Contact Block | RS
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    Auxiliary Contacts

    Auxiliary contacts, also known as auxiliary contactors are electromechanical devices used in conjunction with primary switching equipment such as contactors, circuit breakers, switches, and relays. These secondary switching devices are physically connected to the main switching equipment and work at the same time. The add-on accessories are available in a range of contact configurations and mounting styles to suit a wide range of industrial control applications.RS offer an extensive range of high-quality auxiliary contact blocks from industry-leading brands including Schneider Electric, Siemens, ABB, Lovato, Eaton, and of course RS Pro.

    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. Auxiliary contacts are available in a variety of mounting styles such as a front mount or DIN rail mount and a range of terminal types including screw terminals, screw clamp terminals, and cage clamp terminals making it easy to find the right contact for the application.

    What are auxiliary contacts used for?

    One common usage of auxiliary contacts is in push-button controllers, where they can be built into the start button. They are a common component in relay logic circuits solid-state electronics, electric motors, motor control schemes, and other industrial control applications.

    What are the different types of contact blocks?

    There are two types of contact, contacts that are closed in a non-activated state and those that are open. They will be described as N/C (normally closed) and N/O (normally open).NC contacts are used as interlocks. NO contacts are used for switching on other components such as status indication lamps.

    1097 Products showing for Auxiliary Contacts

    Hager
    1
    1NO+1NC
    Side Mount
    HZC
    HZC3
    20 A
    -
    -
    -
    -
    -
    -
    -
    ABB
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Siemens
    2
    2NC
    Snap-On Mounting
    SIRIUS
    3RH2
    -
    -
    -
    -
    -
    -
    -
    -
    Lovato
    4
    3NO + 1NC
    DIN Rail
    BF00
    BF00
    -
    -
    -
    -
    -
    -
    -
    -
    Siemens
    2
    2NC
    Snap-on
    SIRIUS
    3RH
    10 A
    -
    24 V
    -
    -
    -
    -
    -
    Siemens
    3
    -
    Bottom Side
    SENTRON
    3KC8
    -
    -
    -
    -
    -
    -
    -
    -
    Schneider Electric
    2
    1NO + 1NC
    -
    TeSys
    LUA1
    -
    -
    -
    -
    -
    -
    -
    -
    Lovato
    2
    1NO + 1NC
    Front Centre Mounting
    G4
    11G4
    -
    -
    -
    -
    -
    -
    -
    -
    Eaton
    1
    1NO+1NC
    Side Mounting, Top Mounting
    -
    Moeller
    -
    -
    -
    -
    -
    -
    -
    -
    Eaton
    1
    1NO
    -
    Eaton Moeller NZM
    NZM
    -
    -
    -
    -
    -
    -
    -
    -
    Siemens
    2
    NO/NC
    Snap-On
    Sirius Innovation
    3RH2
    6 A dc, 10 A ac
    Screw
    250 V dc, 690 V ac
    DPST
    -
    -25°C
    +60°C
    -
    Eaton
    -
    -
    Side Mount
    Eaton Moeller A-PKZ0
    A-PKZ0
    -
    -
    -
    -
    -
    -
    -
    -
    Schneider Electric
    -
    -
    -
    TeSys
    -
    -
    -
    -
    -
    Yes
    -
    -
    Green Premium
    Siemens
    2
    1NC + 1NO
    DIN Rail Mount
    SENTRON
    5ST3
    -
    -
    440 V
    -
    -
    -
    -
    -
    WEG
    4
    1NO + 3NC
    Front Mount
    -
    BFCA
    10 A
    Screw
    690 V ac
    4PST
    -
    -
    -
    -
    Hager
    -
    -
    Plug In
    -
    HXA
    -
    Screw
    240 V ac
    -
    -
    -
    -
    -
    Schneider Electric
    -
    -
    Drawout
    Compact
    LV4
    -
    -
    -
    -
    Yes
    -
    -
    Green Premium
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