AN ORIGINAL PODTRONICS 12 VOLT - 120 watt SINGLE PHASE REGULATOR/RECTIFIER UNIT, TO REPLACE EXISTING ZENER DIODE AND RECTIFIER. FOR 12 VOLT, SYSTEMS, POSITIVE OR NEGATIVE EARTH. MAY BE USED WITH LUCAS ALTERNATOR 47205 OR TO CONVERT A 6 VOLT 47204 TO 12 VOLT.