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.

    1079 Products showing for Auxiliary Contacts

    Schneider Electric
    2
    1NC + 1NO
    Front Mount
    -
    LA1S
    -
    Screw
    DP
    -
    Yes
    -
    -
    Green Premium
    Siemens
    1
    1 CO
    -
    SENTRON
    3NW
    -
    -
    -
    250 V
    -
    -
    -
    -
    Allen Bradley
    2
    1NC + 1NO
    Snap-On
    -
    100K
    -
    Screw
    DPST
    -
    -
    -
    -
    -
    Allen Bradley
    2
    2NO
    Front Mount
    -
    100F
    10 A
    Screw
    DPST
    -
    -
    -
    -
    -
    Schneider Electric
    2
    2NO
    Front Mount
    -
    LA1K
    10 A
    Screw
    DP
    600 V ac
    Yes
    -
    -
    Green Premium
    Siemens
    4
    4NC
    Snap-On
    Sirius Innovation
    3RH29
    10 A
    Spring Load
    4PST
    600 V dc, 690 V ac
    -
    -25°C
    +60°C
    -
    Socomec
    4
    NO+NC
    DIN Rail
    3999
    SIDER
    500 A
    -
    -
    -
    -
    -
    -
    -
    Lovato
    1
    1CO
    Side Mount
    -
    P1X
    3 A, 6 A
    Screw
    SPDT
    230 V, 400 V
    -
    -40°C
    +70°C
    -
    Siemens
    4
    1NO + 3NC
    Snap-On
    Sirius Innovation
    3RH29
    10 A
    Spring Load
    4PST
    600 V dc, 690 V ac
    -
    -25°C
    +60°C
    -
    Schneider Electric
    1
    1CO
    Side Mount
    -
    GVAM
    -
    Screw
    SPDT
    -
    Yes
    -
    -
    Green Premium
    Schneider Electric
    -
    1NC + 3NO
    -
    Tesys
    LADN
    -
    -
    -
    690 V
    Yes
    -
    -
    Green Premium
    Siemens
    2
    1NC + 1NO
    Snap-On
    SIRIUS
    3RH1921
    10 A
    -
    -
    17 V dc
    -
    -
    -
    -
    Allen Bradley
    2
    2NO
    Front Mount
    -
    140MP
    -
    -
    -
    -
    -
    -
    -
    -
    Allen Bradley
    2
    1NC + 1NO
    Front Mount
    140MP
    140MP-A-AFA
    -
    -
    -
    250 V
    -
    -
    -
    -
    Siemens
    4
    1NC + 3NO
    Snap-On
    Sirius Innovation
    3RH29
    10 A
    Screw
    4PST
    600 V dc, 690 V ac
    -
    -25°C
    +60°C
    -
    Schneider Electric
    2
    1 NO + 1 NC
    Side Mount
    TeSys
    LAG8N
    10 A
    Push In
    -
    -
    Yes
    -25°C
    '+60°C
    Green Premium
    Kraus & Naimer
    2
    1NC + 1NO
    -
    -
    -
    25 A, 32 A
    -
    DP
    -
    -
    -
    -
    -
    Schneider Electric
    2
    1 NO + 1 NC
    Side Mount
    TeSys
    LAG8N
    10 A
    -
    -
    -
    Yes
    -
    -
    Green Premium
    Siemens
    1
    1NO
    Snap-On
    Sirius Innovation
    3RH2
    6 A dc, 10 A ac
    Screw
    SPST
    250 V dc, 690 V ac
    -
    -25°C
    +60°C
    -
    Allen Bradley
    4
    2NC + 2NO
    Snap-On
    -
    100K
    -
    Screw
    4PST
    -
    -
    -
    -
    -
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