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STMicroelectronics STTH102AY — Discrete Semiconductors

STMicroelectronics STTH102AY Diode, 200V 1A, SMA

MPNSTTH102AY
Active

STMicroelectronics STTH102AY, Q Automotive series, Standard Diode, 200 V, 1 A, Fast Recovery 20 ns, Surface Mount DO-214AC SMA.

$0.4700Ref. price · indicative, final on quote
STMicroelectronics STTH102AY datasheet (PDF)
PackagingDO-214AC, SMA
RoHSROHS3 Compliant
SeriesQ
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STTH102AY specifications
ParameterValue
SeriesQ Automotive
Diode typeStandard
MountingSurface Mount
Voltage - DC reverse (Vr)200 V
Voltage - forward (Vf) (Max) @ if970 mV @ 1 A
Current - reverse leakage @ vr1 µA @ 200 V
Current - average rectified1A
Operating temperature - junction-40°C~175°C
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTape & Reel (TR); Cut Tape (CT)
CaseDO-214AC, SMA
Reverse recovery time20 ns

Product details

1A 200V fast-recovery diode in a hand-solderable SMA package

The STTH102AY is a 200 V, 1 A standard recovery diode from STMicroelectronics' Q Automotive series, packing a 20 ns reverse recovery time into the compact DO-214AC (SMA) surface-mount package. With a forward voltage drop of 970 mV at 1 A and a junction temperature range spanning -40°C to 175°C, this part handles the thermal demands of automotive and industrial environments without breaking a sweat.

What the 20 ns recovery time means for your switching circuit

The 20 ns trr classifies this as a fast-recovery diode (under 500 ns at >200 mA), which means it snaps off reverse current quickly — critical for reducing switching losses in a 100 kHz+ flyback converter or a PFC boost stage where every nanosecond of stored charge adds heat. Reverse leakage is just 1 µA at the 200 V rated voltage, so in a high-impedance snubber or clamp circuit you won't lose bias current through the diode itself.

Active production and compliance paperwork

It carries ROHS3 compliance, so it meets the latest EU restriction on hazardous substances without an exemption sticker.

Frequently asked questions

Will STTH102AY drop into a board that was specified around STTH1R02ZFY without rewiring?

Both parts share the same SMA (DO-214AC) footprint and 1 A current rating, but the STTH1R02ZFY has a 32 ns trr versus the STTH102AY's 20 ns. Electrically they're close enough for many designs, but check the reverse recovery loss budget — the slower part dissipates more heat at high switching frequencies.