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STMicroelectronics STTH4R02D — Discrete Semiconductors

ST STTH4R02D Ultrafast Diode, 200 V 4 A, 30 ns trr, TO-220AC

MPNSTTH4R02D
Obsolete

STMicroelectronics STTH4R02D ultrafast recovery diode, 200 V, 4 A, 30 ns trr, TO-220AC, through-hole, fast recovery ≤500 ns, >200 mA.

$1.1600Ref. price · indicative, final on quote
STMicroelectronics STTH4R02D datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STTH4R02D specifications
ParameterValue
MountingThrough Hole
Voltage - DC reverse (Vr)200 V
Voltage - forward (Vf) (Max) @ if1.05 V @ 4 A
Current - reverse leakage @ vr3 µA @ 200 V
Current - average rectified4A
Operating temperature - junction175°C (Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
TechnologyStandard
CaseTO-220-2
Reverse recovery time30 ns

Product details

30 ns reverse recovery — what it buys the switching stage

The STTH4R02D is a 200 V, 4 A ultrafast recovery diode from STMicroelectronics, specified with a 30 ns reverse recovery time (trr). That trr figure is the headline parameter for a fast-recovery diode in a 200 V class — it directly sets the turn-off switching loss in a PFC boost stage, flyback clamp, or secondary-side snubber. At 4 A average rectified current (Io) and a forward voltage of 1.05 V at 4 A, conduction loss is moderate; the diode is a good fit for continuous-current mode (CCM) power converters running in the 50–150 kHz range where recovery charge dominates the loss budget.

Housed in a TO-220AC (TO-220-2) through-hole package, the STTH4R02D is suited for board-level mounting with a heatsink tab. The through-hole form factor simplifies manual replacement in rework or repair scenarios compared to surface-mount alternatives.

Frequently asked questions

Is the STTH4R02D obsolete?

Yes, the STTH4R02D is listed as Obsolete. It is no longer manufactured by STMicroelectronics.

What is the reverse recovery time of the STTH4R02D?

The reverse recovery time (trr) is 30 ns.

What is the replacement for STTH4R02D?

ST does not list an official successor for the STTH4R02D. A replacement should be selected by matching the 200 V reverse voltage, 4 A average current, 30 ns trr, and TO-220AC package. Parametric equivalents from other manufacturers (e.g., similar ultrafast diodes in the same voltage/current class) can be cross-referenced, but pinout and thermal performance should be verified against the original design.