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very high current DC switch

Discussion in 'Electronic Components' started by Chris W, Jun 14, 2006.

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  1. Chris W

    Chris W Guest

    Does anyone know where I can get a reasonably priced ($30 or less)
    switch that can handle at least 200 amps at 13.8V?

    Chris W

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  2. Have you thought of contactors?

    Car starter solenoids, battery vehicle contactors etc?

    Just a thought, DC switches are getting rarer by the year, we use some Schneider
    Group switches that are fast breaking but way outside your budget.

  3. JeffM

    JeffM Guest

  4. Tim Williams

    Tim Williams Guest

    As I recall, contactors are rape. Hell, the MOSFETs to do that (say, 8 x
    IRFZ46N, maybe $10) are cheaper than the $1/amp I recall advertised. YMMV..

  5. Bill Janssen

    Bill Janssen Guest

    Don't know about the $30.00 or less but Marine and RV places have a
    battery selector switch.

    Bill K7NOM
  6. We pay £18 or so for a 180A rated 28V DC continuously rated coil, or
    higher/lower price depending on output.

    We make large industrial chargers for the rail industry and use these for output

    Have a look at Albright International's website:

    We use the SW80, SW180, SW200 and SW201 (SW201 has Change-over contacts)

    If any of those meet your needs, we can probably help source some in small
    numbers for you or they may have agents over in the USA.

    We only use 28V DC continuously rated coils (most other voltages are available)
    and have SW80 and SW180 on the shelf in the stores here.


  7. Jasen Betts

    Jasen Betts Guest

    maybe an old starter switch (from before solenoids/relays were used)

  8. Roy L. Fuchs

    Roy L. Fuchs Guest

  9. Jamie

    Jamie Guest

    go to your auto parts store and ask for a
    out board starter solenoid.
  10. Ross Herbert

    Ross Herbert Guest

    I'd like to see those contacts after they tried to break a motor
    circuit carrying 100A DC - the return spring looks very weak... not
    exactly a rapid action.
  11. default

    default Guest

    Starter solenoid (they usually have a limited duty cycle)

    Sustained contact:
    Industrial power contactor (Relay)

    Battery Selector switch as used on Boats -(usually four position
    Battery #1, Battery #2, Both, Off)

    Check an auto parts store for a battery switch - usually designed to
    mount on the battery terminal to break contact to prevent loads and
    leakage from running down the battery while in storage, or to prevent
    vehicle theft.

    A Big Old knife switch - scarcer than hen's teeth, but relatively easy
    to make.
  12. John

    John Guest

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