replace relay with Mosfet transistor

Discussion in 'The Projects Forum' started by mah, Dec 21, 2014.

  1. tcmtech

    Distinguished Member

    Nov 4, 2013
    T0 further point out the folly behind this home brew mess here is the data sheet that gives the specs for a typical off the shelf 25 - 90 amp SSR.

    Notice the high surge capacity plus transient voltage ratings and most importantly the 1.15 volt maximum forward drop voltage at the full rated load.

    Simply put you will not beat those specs, capacities and size constraints with any home brew SSR circuit especially one based on a bridge rectifier and a power Mosfet. :oops: