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STMicroelectronics STTH1210D — Discrete Semiconductors

STTH1210D Fast Recovery Diode, 1 kV, 12 A, 90 ns trr

MPNSTTH1210D
Active

STMicroelectronics STTH1210D, Fast Recovery Diode, Standard, 1000 V, 12 A, 90 ns reverse recovery, 2 V forward voltage at 12 A, TO-220AC, Through Hole.

$3.1500Ref. price · indicative, final on quote
STMicroelectronics STTH1210D datasheet (PDF)
PackagingTO-220-2
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STTH1210D specifications
ParameterValue
Diode typeStandard
MountingThrough Hole
Voltage - DC reverse (Vr)1000 V
Voltage - forward (Vf) (Max) @ if2 V @ 12 A
Current - reverse leakage @ vr10 µA @ 1000 V
Current - average rectified12A
Operating temperature - junction175°C(Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
CaseTO-220-2
Reverse recovery time90 ns

Product details

90 ns reverse recovery at 1 kV — the switching edge

The STTH1210D is a 1 kV, 12 A fast recovery diode from STMicroelectronics with a reverse recovery time (trr) of 90 ns. This combination of high blocking voltage and fast turn-off places it in the boost-PFC stage of switch-mode power supplies and in flyback converters where the diode must snap off cleanly before the next switching cycle begins.

Forward voltage and leakage — the thermal budget

Maximum forward voltage is 2 V at 12 A, which sets the conduction loss floor. Reverse leakage at rated blocking voltage is 10 µA — negligible at room temperature but it rises exponentially with junction temperature. The maximum junction temperature is 175 °C, so the designer must account for the Vf × If product plus the leakage power at high line in the heatsink calculation.

Frequently asked questions

What is the pinout of STTH1210D?

Design engineers need to validate pin-to-pin compatibility with the PCB layout.

Where to buy STTH1210D?

Sourcing buyers need to find authorized distributors with stock to fill BOM lines.

Is STTH1210D obsolete?

Brokers and procurement teams need lifecycle status to avoid end-of-life risks.

What is the equivalent of STTH1210D?

Maintenance techs and buyers need cross-references for replacement or alternate sourcing.

What is the price of STTH1210D?

Cost is a key factor for BOM pricing and budget approval.

What is the reverse recovery time of STTH1210D?

Critical parameter for high-frequency switching designs to ensure efficiency and EMI compliance.