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STMicroelectronics STTH1R04A — Discrete Semiconductors

STTH1R04A 400V 1A Fast Recovery Diode, 30ns trr, SMA

MPNSTTH1R04A
Active

STMicroelectronics STTH1R04A, Standard Fast Recovery Diode, 400 V, 1 A, 30 ns Reverse Recovery Time, DO-214AC SMA, Surface Mount.

$0.4400Ref. price · indicative, final on quote
STMicroelectronics STTH1R04A datasheet (PDF)
PackagingDO-214AC, SMA
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STTH1R04A specifications
ParameterValue
Diode typeStandard
MountingSurface Mount
Voltage - DC reverse (Vr)400 V
Voltage - forward (Vf) (Max) @ if1.5 V @ 1 A
Current - reverse leakage @ vr5 µA @ 400 V
Current - average rectified1A
Operating temperature - junction175°C(Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTape & Reel (TR); Cut Tape (CT)
CaseDO-214AC, SMA
Reverse recovery time30 ns

Product details

400 V, 1 A fast recovery rectifier — 30 ns trr

The STTH1R04A is a 400 V, 1 A standard fast recovery rectifier from STMicroelectronics, housed in a surface-mount package. Its 30 ns reverse recovery time makes it a fit for high-frequency switching circuits where recovery charge and switching losses matter.

A 30 ns trr at 1 A forward current and 400 V reverse voltage suits continuous-conduction-mode PFC boost stages and flyback clamp circuits. The 1.5 V forward voltage drop at 1 A is typical for a 400 V planar fast-recovery die.

175°C junction — thermal headroom for tight enclosures

Rated for a maximum junction temperature of 175°C, this diode can sit in a 100°C ambient with limited copper area on the SMA cathode tab and still stay inside its SOA. The 5 µA reverse leakage at 400 V and 25°C junction is a room-temperature floor; expect leakage to double every 10°C rise, so budget the thermal path accordingly.

Frequently asked questions

Is the STTH1R04A RoHS compliant?

Yes, the STTH1R04A is ROHS3 compliant per STMicroelectronics' listing.

What is the difference between STTH1R04A and STTH1R04?

The STTH1R04A and STTH1R04 share the same 400 V, 1 A, 30 ns trr die. The 'A' suffix typically denotes the package variant — the STTH1R04A is supplied in DO-214AC (SMA) surface-mount package, while the STTH1R04 is in a through-hole DO-41 package. The electrical specifications are identical.