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Mosfet Regulator?

Discussion in 'The Garage' started by Tomterrific, Jan 11, 2021.

  1. Tomterrific

    Tomterrific XS650 Junkie

    Will a mosfet regulator work with a capacitor? My SR500 could use a better regulator and I was able to score a 5 wire regulator on Amazon. But since the mosfet works different it could need a battery instead of a capacitor

    The SR has a 3 phase permanent magnet alternator like some modded XS. The mosfet works as a series regulation, opening the circuit. A normal regulator uses shunt regulation. The mosfet should run the alternator cooler. I'm not sure if I have this right so please correct.

  2. Max Midnight

    Max Midnight XS650 Addict

    I would say yes; the V Max has a three phase alternator and the OE r/r is swapped with a MOSFET type without issues so I would assume it would be the same for a SR500.
  3. What's the part number on your regulator?

    Don't confuse mosfet and series regulation. Plenty of mosfet regulators are shunt. The mosfet shunt regulators run cooler themselves but do nothing to help out the stator. It seems to me a regulator that switches the alternator on and off would be working at cross purposes to a capacitor and no battery setup, but I'm often wrong. Also, a lot of those ebay/Amazon regulators turn out to be shunt even when they are advertised as series, which is just plain fraud in my opinion.
  4. I didn't mean to sound judgemental, but a lot of people have been burned by fake Shindengen SH775 look alike regulators off of Ebay which turn out to be shunts.
  5. Tomterrific

    Tomterrific XS650 Junkie

    That is good information. I was naive enough to think mosfet meant series. Of course it could be a common shunt regulator with a mosfet. Well I needed a regulator anyhow and this was only $27.


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