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STMicroelectronics STTH108A — Discrete Semiconductors

STTH108A 800V 1A Fast Recovery Diode, SMA, 75ns trr

MPNSTTH108A
Active

STMicroelectronics STTH108A, Standard Fast Recovery Diode, 800V 1A, 75ns trr, 1.65V Vf, Surface Mount DO-214AC (SMA), 175°C Junction, Active.

$0.6600Ref. price · indicative, final on quote
STMicroelectronics STTH108A datasheet (PDF)
PackagingDO-214AC, SMA
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STTH108A specifications
ParameterValue
Diode typeStandard
MountingSurface Mount
Voltage - DC reverse (Vr)800 V
Voltage - forward (Vf) (Max) @ if1.65 V @ 1 A
Current - reverse leakage @ vr5 µA @ 800 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 time75 ns

Product details

800 V fast recovery in an SMA footprint

The STTH108A is a standard fast recovery diode rated for 800 V reverse voltage and 1 A average rectified current, packaged in a DO-214AC (SMA) surface-mount case. It targets PFC boost stages, flyback snubbers, and secondary-side freewheeling in offline power supplies where the bus voltage exceeds 400 V.

175°C junction — thermal headroom for sealed supplies

Rated for a maximum junction temperature of 175°C, the STTH108A can deliver its full 1 A forward current in a high-ambient environment inside a sealed power supply enclosure where the board temperature reaches 85-100°C. A 150°C-rated diode would need derating or a larger package at those ambients.

Frequently asked questions

What is the difference between STTH108A and STTH108?

The STTH108A is the surface-mount variant in a DO-214AC (SMA) package, while the base STTH108 is typically offered in a through-hole package. The die and electrical ratings — 800 V, 1 A, 75 ns trr — are the same. The A suffix identifies the SMA package option.

Does STTH108A come in tape and reel?

Yes, the STTH108A is available in Tape & Reel (TR) packaging for automated assembly, as well as Cut Tape (CT) for smaller quantities.