Abstract: A bridge rectifier for an alternator comprises a first heat sink for being secured to a frame of an alternator; a second heat sink disposed on top of the first heat sink; an electrical insulator disposed between the first and second heat sinks; a first group of diodes operably secured to the first heat sink; a second group of diodes operably secured to the second heat sink; an insulating support operably secured to the second heat sink, the support including a plurality of legs adapted to be received in respective holes in the second heat sink; a plurality of screws adapted to be received axially by respective legs, the screws being adapted to expand the legs radially, thereby to lock the legs in respective holes; and a plurality of electrical connectors each being operably connected to a respective pair of diodes, each pair comprising a diode from the first group and a diode from the second group, each of the plurality of electrical connectors for being operably connected to the alternator, each of the plura