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STMicroelectronics STPS4030CT — Discrete Semiconductors

STPS4030CT Schottky Diode, 30 V 20 A Common Cathode TO-220

MPNSTPS4030CT
Obsolete

STMicroelectronics STPS4030CT, Schottky diode, 1 Pair Common Cathode, 30 V Vr, 20 A per diode, 490 mV Vf at 20 A, Fast Recovery =< 500ns, > 200mA (Io), TO-220-3, Through Hole, Tube.

STMicroelectronics STPS4030CT datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STPS4030CT specifications
ParameterValue
Diode typeSchottky
MountingThrough Hole
Voltage - DC reverse (Vr)30 V
Voltage - forward (Vf) (Max) @ if490 mV @ 20 A
Current - reverse leakage @ vr1 mA @ 30 V
Current - average rectified (Io) (per diode)20A
Operating temperature - junction150°C(Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
CaseTO-220-3
Diode configuration1 Pair Common Cathode

Product details

30 V, 20 A per leg — what this Schottky pair delivers

The forward voltage drop is 490 mV at 20 A, which keeps conduction losses manageable in a TO-220 through-hole package. The fast-recovery characteristic (≤500 ns, >200 mA) suits it for switching power supplies and OR-ing diodes where low Vf and fast turn-off matter.

Obsolete — plan the replacement now

This means STMicroelectronics no longer manufactures it, and the only available stock is through independent distribution or surplus channels.

Thermal and mechanical fit

The TO-220-3 through-hole package with a common-cathode pair means the two anodes are separate and the cathode tab is shared — a standard footprint for dual-rectifier designs. Reverse leakage is 1 mA at 30 V, typical for a Schottky at this voltage and current class.

Frequently asked questions

What is the replacement for STPS4030CT?

No official successor is recorded for the STPS4030CT. A parametric replacement would be any 30 V, 20 A per-diode common-cathode Schottky in a TO-220-3 package — check vendors like ON Semiconductor, Diodes Inc, or Vishay for equivalent ratings.