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STMicroelectronics STTH4R02 — Discrete Semiconductors

STTH4R02 Fast Recovery Diode, 200V 4A, 30ns trr, DO-201AB

MPNSTTH4R02
Obsolete

STMicroelectronics STTH4R02, Fast Recovery Diode, Standard 200V 4A, 30ns Reverse Recovery Time, Through Hole DO-201AB Axial, 175°C Junction.

STMicroelectronics STTH4R02 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STTH4R02 specifications
ParameterValue
Diode typeStandard
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)
PackageCut Tape (CT); Tape & Box (TB)
CaseDO-201AB, DO-32, Axial
Reverse recovery time30 ns

Product details

The STMicroelectronics STTH4R02 is a 200 V, 4 A fast-recovery epitaxial diode in a through-hole DO-201AB axial package. Its 30 ns reverse recovery time (trr) places it squarely in the ultrafast class, suited for continuous-current-mode (CCM) power-factor-correction boost stages, secondary-side rectification in 100 W–300 W switch-mode supplies, and freewheeling diodes in motor-drive snubbers where recovery speed directly impacts switching loss and EMI.

The 30 ns reverse recovery time is the defining parameter. In a 100 kHz PFC boost stage, that trr keeps the reverse-recovery charge low enough that the MOSFET turn-on losses stay manageable without resorting to SiC. Compare this to a standard recovery diode in the same voltage class — the STTH4R02 cuts the recovery loss by roughly an order of magnitude. The 1.05 V forward drop at 4 A is a reasonable trade-off: you get the speed without the 1.5 V+ Vf of some older ultrafast parts.

Package and mounting — axial lead, no surprises

The DO-201AB axial package is a standard through-hole form factor. Lead spacing and body diameter match the common DO-201 footprint used in PFC boost and output rectifier positions.

Frequently asked questions

What is the reverse recovery time of STTH4R02?

The STTH4R02 has a reverse recovery time (trr) of 30 ns, classifying it as an ultrafast recovery diode suitable for switching frequencies above 100 kHz.

What is the direct replacement for STTH4R02?

No official direct replacement order code is listed by STMicroelectronics. A functionally similar part would need to match the 200 V, 4 A rating, 30 ns trr, and DO-201AB package. Cross-referencing against the STTH4R02 family or a comparable ultrafast diode from another manufacturer requires checking the specific BOM requirements.