Heatsink base. Convert your single phase current input into DC with this Bridge Rectifier. This bridge rectifier can be used in a wide variety of applications. Product Name : Bridge Rectifier Model : -QL100A/1200V Output Current(DC) : 100A Repetitive Peak Reverse Voltage(AC) : 1200V Fixing Holes Diameter : 5mm / 0.19" Fixing Holes Spacing : 52mm / 2" Main Body Size : 98 x 59 x 29mm / 3.86" x 2.3" x 1.1" (L*W*T) Overall Height : 56mm / 2.2" Material : Metal Color : Black Package Content : 1 x Bridge Rectifier Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/-1-3 cm.