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STMicroelectronics STPS40SM80CG-TR — Discrete Semiconductors

STPS40SM80CG-TR Schottky Diode, 80 V, 20 A, D²Pak, Obsolete

MPNSTPS40SM80CG-TR
Obsolete

ST STPS40SM80CG-TR, Schottky diode, 1 pair common cathode, 80 V DC reverse, 20 A average per diode, 800 mV forward drop at 20 A, 50 µA leakage at 80 V, D²Pak (TO-263) surface mount, fast recovery ≤500 ns.

STMicroelectronics STPS40SM80CG-TR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STPS40SM80CG-TR specifications
ParameterValue
Diode typeSchottky
MountingSurface Mount
Voltage - DC reverse (Vr)80 V
Voltage - forward (Vf) (Max) @ if800 mV @ 20 A
Current - reverse leakage @ vr50 µA @ 80 V
Current - average rectified (Io) (per diode)20A
Operating temperature - junction175°C(Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTape & Reel (TR); Cut Tape (CT)
CaseTO-263-3, D²Pak (2 Leads + Tab), TO-263AB
Diode configuration1 Pair Common Cathode

Product details

Dual Schottky in a single D²Pak tab

The STPS40SM80CG-TR is a Schottky rectifier from ST, housing a pair of common-cathode diodes in a D²Pak (TO-263) surface-mount package. The fast-recovery speed (≤500 ns at >200 mA) suits it for switching power supplies, OR-ing diodes, and freewheeling circuits where low forward loss and fast turn-off are needed.

Obsolete — plan the replacement now

ST lists the STPS40SM80CG-TR as obsolete. For new designs or BOM lines that need a drop-in, the common-cathode Schottky in D²Pak at 80 V / 20 A per diode is a well-populated space — look for a pin-compatible alternative from ST or another vendor with the same footprint and current rating.

Thermal and mounting notes for the D²Pak

The D²Pak (TO-263) package has an exposed tab on the bottom that carries the cathode connection. The junction temperature ceiling is 175 °C, so the thermal pad and airflow need to keep the junction below that under the full 20 A load per diode.

Frequently asked questions

Does STPS40SM80CG-TR have a common cathode configuration?

Yes. The two Schottky diodes share a common cathode connection, with the anodes brought out separately. This is the standard arrangement for center-tap rectifiers and OR-ing applications.

What is STPS40SM80CG-TR's listed speed?

It is rated as a fast-recovery Schottky with recovery time ≤500 ns at forward current >200 mA.