400 V, 6 A — standard recovery for automotive bulk rectification
The RR601BM4SFHTL is a standard recovery rectifier from ROHM, rated 400 V reverse voltage and 6 A average forward current. It is qualified to AEC-Q101, making it a fit for automotive power conversion stages where line-frequency rectification is needed — alternator output, DC-DC converter input bridges, and motor-drive bulk rectifiers. Standard recovery speed (over 500 ns at 200 mA) means this diode is not intended for high-frequency switching. It is suited for line-frequency bridge rectifiers and reverse-polarity protection circuits where the recovery time does not limit the design.
Forward drop and leakage — the thermal budget numbers
Maximum forward voltage is 1.1 V at 6 A — at full rated current that is 6.6 W conduction loss. Reverse leakage at 400 V is 10 µA — low enough that it will not upset the bias in a typical bridge, but worth checking if the diode sits across a high-impedance sense node.
Package and mounting — TO-252 field-fit
Surface-mount in a TO-252-3 (DPak) case with two leads and a tab — the tab is the cathode. The part is marked; orientation is obvious once you see the tab side. No lab bench needed to swap it, but the tab solder pad needs a good thermal connection to the board.
Lifecycle — active, no obsolescence flag
Product status is Active.