The invention discloses a radiating fin structure surface-
mount rectifier bridge device. The radiating fin structure surface-
mount rectifier bridge device comprises a first
diode chip, a second
diode chip, a third
diode chip, a fourth diode chip and a
cathode metal strip all coated by an
epoxy packaging body, and a first
metal substrate, a second
metal substrate and an E-shaped
metal substrate are respectively located at left side and right side of the bottom of the
epoxy packaging body; a first connecting sheet, a second connecting sheet, a third connecting sheet and a fourth connecting sheet are arranged in parallel along a front-to-back direction; the front end of the
cathode metal strip, located between the first
metal substrate and the E-shaped
metal substrate, comprises a bending part, and the bottom of the bending part and the bottom of each of the first metal substrate, the second
meal substrate and the E-shaped metal substrate are in the same horizontal plane and are all naked outside the
epoxy packaging body; the first metal substrate and the second metal substrate are used as
alternating current input ends, the
cathode metal strip is used as a
direct current cathode end, and the E-shaped metal substrate is used as a
direct current anode end. According to the invention, a radiating path between the chips and a PCB is shortest, radiating fins are metal material and have excellent heat
conductivity coefficient, own radiating capacity of the PCB is used fully, and defects of the existing product, such as poor epoxy heat conduction capability caused by radiating through
air convection in a case, are avoided.