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STMicroelectronics STTH310UFY — Discrete Semiconductors

STTH310UFY Fast Recovery Diode, 1 kV 3 A, AEC-Q101, SMBflat

MPNSTTH310UFY
Active

STMicroelectronics STTH310UFY, Automotive AEC-Q101, Standard Diode, Fast Recovery ≤ 500 ns, 1000 V, 3 A, 75 ns trr, Surface Mount DO-221AA SMB Flat Leads, -40°C~175°C Junction.

$0.9500Ref. price · indicative, final on quote
STMicroelectronics STTH310UFY datasheet (PDF)
PackagingDO-221AA, SMB Flat Leads
RoHSROHS3 Compliant
SeriesECOPACK®2
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STTH310UFY specifications
ParameterValue
SeriesAutomotive, AEC-Q101, ECOPACK®2
Diode typeStandard
MountingSurface Mount
Voltage - DC reverse (Vr)1000 V
Voltage - forward (Vf) (Max) @ if1.7 V @ 3 A
Current - reverse leakage @ vr10 µA @ 1000 V
Current - average rectified3A
Operating temperature - junction-40°C~175°C
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTape & Reel (TR); Cut Tape (CT)
CaseDO-221AA, SMB Flat Leads
Reverse recovery time75 ns

Product details

Fast recovery diode for automotive and industrial power stages

The STMicroelectronics STTH310UFY is a 1000 V, 3 A fast recovery diode in the SMBflat (DO-221AA) package, qualified to AEC-Q101 for automotive applications. Its 75 ns reverse recovery time suits it for continuous-conduction-mode PFC boost stages, output rectification in DC-DC converters, and snubber clamping where switching losses matter.

The 75 ns trr at rated conditions keeps reverse-recovery charge low, which directly reduces turn-off losses in hard-switched topologies. In a 100 kHz PFC stage, the recovery charge difference between a 75 ns and a 250 ns diode can shift the thermal budget by several watts at 3 A. The fast recovery classification (≤ 500 ns, > 200 mA) confirms this part is optimised for the high-frequency end of the line-frequency rectifier spectrum.

AEC-Q101 and 175 °C junction — automotive thermal budget

AEC-Q101 qualification gates this diode into under-hood and transmission-mounted electronics where the ambient can exceed 105 °C. The SMBflat package with flat leads reduces the solder-joint stress from thermal cycling compared to a gull-wing SMB.

ROHS3 compliance and the ECOPACK®2 halogen-free mould compound are confirmed.

Frequently asked questions

Is the STTH310UFY automotive qualified?

Yes, the STTH310UFY is AEC-Q101 qualified, making it suitable for automotive power-train and chassis-domain applications that require the extended temperature range and reliability screening.

What is the reverse recovery time of the STTH310UFY?

The reverse recovery time (trr) is 75 ns under standard test conditions, placing it in the fast-recovery class for switching frequencies up to several hundred kilohertz.