The MB8S is a single-phase surface mount bridge rectifier rated at 800 V and 0.5 A average forward current. Manufactured in the SOIC-4 (TO-269AA) package, the MB8S achieves high surge current absorption within a very small footprint of just 35 mm².
The official MB8S datasheet PDF is published by onsemi (formerly ON Semiconductor) and Fairchild Semiconductor. It covers the complete MB1S–MB8S family, differing only in the maximum repetitive reverse voltage (VRRM): MB1S at 100 V, MB2S at 200 V, MB4S at 400 V, MB6S at 600 V, and MB8S at 800 V.
MB8S Absolute Maximum Ratings
Maximum Repetitive Reverse Voltage (VRRM): 800 V
Maximum RMS Bridge Input Voltage (VRMS): 560 V
DC Reverse Voltage (VR): 800 V
Average Rectified Forward Current at TA = 50 °C (IF(AV)): 0.5 A
Non-Repetitive Peak Forward Surge Current (IFSM): 35 A (8.3 ms single half-sine-wave)
Storage Temperature Range (TSTG): −55 °C to +150 °C
Operating Junction Temperature Range (TJ): −55 °C to +150 °C
Datasheets are available for free download from onsemi.com, Fairchild Semiconductor, and authorized distributors including DigiKey, Mouser, Farnell and element14.