TRIAC selection

Discussion in 'General Electronics Chat' started by whale, Jun 24, 2010.

  1. whale

    Thread Starter Active Member

    Dec 21, 2008
    I have a 1HP water pump in my home. I am designing an automatic water level controller.I have chosen T2035H (TRIAC from st electronics),from the data sheet i came to know that it can withstand upto 30A(RMS).Will this TRIAC withstand the starting current of my motor(it's a single phase induction motor of 1HP).
    I can make a guess that a one HP motor under 230v ac can sink about 5A of current under a worst power factor of 0.6. but i don't think my motor posses such a worst power factor .All are clear but what about the starting current?
    it's a capacitor start motor and will consume about 5 times the normal current during staring period.

    here is the data sheet,
  2. beenthere

    Retired Moderator

    Apr 20, 2004
  3. whale

    Thread Starter Active Member

    Dec 21, 2008
    but i want to eliminate snubber circuits, so i thought of using snubberless triac.In fact i am not gud in snubber circuits.
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    For such motors, what beenthere suggested is the best.
    You will eventually burn up normal triacs.

    Where do u want to use a snubber?