New MOSFET 20 Amp Voltage Rectifier Regulator

Author: Tri-Spark   Date Posted:27 November 2019 

We are pleased to let you know we have developed a premium voltage regulator with the latest MOSFET technology.

Now you can replace those ageing Lucas components on your bikes charging system with the MOSFET 20 Amp Voltage Rectifier Regulator. Get improved power output, less heating and better reliability.

These voltage regulators use MOSFET technology for cool running reliability. Unlike the previous generation of regulators that waste power and run hot.

Our MOSFET Voltage Rectifier Regulator has many benefits:

  • Generous 20 amp rating exceeds the requirements of 10 amp, 16 amp and 14.5 amp two and three wire stators commonly used on British bikes
  • High output power with low temperature
  • Fast voltage recovery - low battery
  • Heavier wire connections are extra long (60 cm) in two sleeves so you can route the wires and connect them exactly as you wish.


Size is 80 x 67 x 20 mm. Mounting hole centres 64mm

Here are two thermal images of voltage regulators operating; picture one is of a well known voltage regulator on the market, picture two is the MOSFET Regulator. As you can see the temperature is a lot less.

Picture one Picture two


Smaller in size makes fitting possible in tight locations under the seat or behind side panels. Cool running so you can hide it away!

Why muck around with hot unreliable regulators that waste over 20 watts of precious power when you can have the latest!

Suitable for use with 2 and 3 wire stators (single and three phase). 10 amp single phase, 16 amp single phase and 14.5 amp three phase. These stators are commonly know as RM21, RM23 and RM24 used on Triumph, Norton, BSA , Enfield, Matchless etc...compatible with any single or three phase permanent magnet 12 volt alternator up to 20 amps.

Whether you are replacing the original equipment plate rectifier and zener diode or upgrading an older reg. this one will tick all the boxes!

Complete with wiring instructions and covered by a 2 year warranty. This is a high quality solution for your classic bike's charging problems.


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