Device identity and key parametrics
The STPS30SM80CFP: This is the go-to topology for center-tapped secondary rectification in switch-mode power supplies and for OR-ing diodes in redundant power feeds where the common cathode ties to the output rail. Each diode's forward voltage is 790 mV maximum at 15 A, and the fast-recovery speed (under 500 ns) means it handles switching frequencies well above 50 kHz without the reverse-recovery losses that plague standard PN-junction rectifiers in the same slot.
Housed in the TO-220AB Full-Pak (TO-220-3 Full Pack), this is the fully isolated variant — the metal tab is molded over, so no insulating pad or washer is needed between the device and the heatsink. The mounting hole pattern matches standard TO-220, but the full-pack body is slightly thicker; confirm the clip or screw length if replacing a standard TO-220 in an existing assembly.
STMicroelectronics lists this part as Obsolete. No official successor part number is published. Sourcing is through independent surplus and broker channels — stock is lot-specific, date codes vary, and quantities are confirmed at RFQ. ROHS3 compliant per the manufacturer's statement.
