1200 V, 30 A dual fast recovery in an ISOTOP tab
Each of the two independent diodes delivers a reverse recovery time of 115 ns, placing it in the fast-recovery class for hard-switching power converters. The ISOTOP baseplate is designed for chassis mounting, which means the thermal path runs through the mounting surface into the heatsink — the package itself is the power loop.
A 115 ns reverse recovery time at 30 A forward current and 1200 V blocking voltage is fast enough for continuous-conduction-mode PFC stages in the 50–100 kHz range and for output rectification in phase-shifted full-bridge converters. The fast recovery reduces turn-off losses compared to a standard recovery diode, which matters when the junction temperature is already at the 150 °C maximum rating. Slower diodes in the same voltage class would run 200–500 ns and force a snubber or a derating of switching frequency.
Obsolete — the sourcing picture
No replacement part number is recorded in the official transition notice.
ISOTOP mounting — what the chassis-mount package expects
The ISOTOP (also called ISOTOP®) package is a power module with a nickel-plated copper baseplate and M4 or M5 mounting screws. The two independent diodes share the baseplate as the common cathode or are isolated depending on the internal wiring — this variant uses two independent diodes, so each anode and cathode pair is separate. The package is delivered in Tube, not Tape & Reel. Chassis mounting means the thermal interface material between the baseplate and heatsink determines the junction-to-case thermal resistance; a 0.1 mm layer of thermal grease is the standard practice for this package class.