Generators & Regulators - 190E, 300CE, 300E, 300SE & 300TE: Description

Bosch alternators are conventional 3-phase, self-rectifying alternators. Bosch 55-amp through 75-amp alternators use 3 positive and 3 negative diodes connected to stator windings to rectify current. Bosch 80-amp and 90-amp alternators use 14 diodes.

All alternators use 3 exciter diodes connected to stator windings. These diodes turn off the alternator indicator light and supply power to voltage regulator while engine is running. Bosch regulators are transistorized and integral within alternator.