How to use a MOSFET as relay/switch

Discussion in 'General Electronics Chat' started by XOIIO, Apr 23, 2013.

  1. XOIIO

    Thread Starter Member

    Mar 1, 2013
    So, I need a way to use a MOSFET as a relay, I am going to try switching 250v, I'm not sure what amperage but the MOSFET I have is 20 amps, and that is the highest amperage one I have. This is the one I want to use.

    So, I was wondering, how exactly do I wire this up to trigger it from a button, or possibly microcontroller or whatnot. I have not worked with MOSFETs before so this is entirely new to me.

    Also, I'm not sure if this helps with the amperage possibly but I have two 4400uf 250v capacitors which is what I am switching the power from, I'm not sure if the amperage can be determined from that or not, I am using 8 camera flash circuits in parrallel to charge them.

    So, how exactly do I set this up?
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    Can you provide your circuit, a relay maybe easier for your application?
  3. ScottWang


    Aug 23, 2012
    Attach the circuit is better that we are guessing.
    Maybe using the SSR/30A or 40A could suit for your need.