Matsushita Micro switch - drop in repalcement advice

Discussion in 'DIY' started by jezzalenko, Oct 12, 2017 at 2:15 AM.

  1. jezzalenko

    jezzalenko New Member

    Messages:
    10
    Hi,

    working on a Sanyo TP 625 that has a faulty micro switch. was wondering if anyone had advice on a drop in replacement for a

    Matsushita Micro Switch AM4100 (3A 125VAC, 2A 250VAC)

    that isnt on ebay preferably, and is not obselete. Available from a large supplier (RS online, Digikey, mouser, element 14) Looking to match with the screw holes, height and rough approximation of size. Failing that, height and rough approx of size.

    Mat micro switch 1.jpg Mat micro switch 2.jpg Mat micro switch 3.jpg
     
  2. stoN_Cold

    stoN_Cold Super Member

    Messages:
    2,620
    Location:
    Belgrade, Serbia
  3. jezzalenko

    jezzalenko New Member

    Messages:
    10
    ok mate. I found this too, but the shipping is $100+ to australia....Anyone else using a drop in replacement available from large suppliers (RS online, Digikey, mouser, element 14)
     
  4. stoN_Cold

    stoN_Cold Super Member

    Messages:
    2,620
    Location:
    Belgrade, Serbia
  5. restorer-john

    restorer-john Super Member

    Messages:
    3,969
    Location:
    Australia
    The matsushita switch is usually a very low pressure actuation and the plastic insulator is there as they are usually screwed to a metal bracket in the TT mechs.

    None of the links above have insulation around the terminals.

    You can of course use a non plastic-shielded modern one, but beware the actuation force in the mechanism and make sure it is extremely well insulated and have some thin elephant hide insulator between the switch and the metal chassis plate.
     
  6. jezzalenko

    jezzalenko New Member

    Messages:
    10
  7. jezzalenko

    jezzalenko New Member

    Messages:
    10
    Cheers, very interesting to know that many modern ones do not have the insulation around the terminal. Definitely have to look at a mod to insulate properly.

    The advice on low pressure actuator is very handy too. Can you suggest a brand that uses low pressure actuators that would be suitable for a turntable?
     
  8. stoN_Cold

    stoN_Cold Super Member

    Messages:
    2,620
    Location:
    Belgrade, Serbia
    &
     
  9. jezzalenko

    jezzalenko New Member

    Messages:
    10
    I'm looking at a few switches with a 1.47N - is this operating force something you'd consider low restorer-john? sounds like you would have a good idea by your name ;-)
     
  10. restorer-john

    restorer-john Super Member

    Messages:
    3,969
    Location:
    Australia
    Omron quote the actuation pressure in their data sheets or website.

    Does the old Matsushita still actuate OK, because you can press it slowly against kitchen scales until it actuates and read off the force required.

    If it's just an auto return semi, you can likely get away with practically any of them, it's just that the high actuation pressure (usually 10A or more contact rating) may throw the arm sideways a little when you lift it off the rest.
     
  11. jezzalenko

    jezzalenko New Member

    Messages:
    10
    Thanks Restorer-John, good advice. I'll convert the grams to newtons if required. Thats enough info for me to go on from here.
     

Share This Page