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STMicroelectronics STTH212 — Discrete Semiconductors

STTH212 Fast Recovery Diode, 1200 V, 2 A, DO-201AD

MPNSTTH212
Obsolete

ST STTH212, Fast Recovery Diode, Standard, 1200 V, 2 A, 75 ns trr, DO-201AD Axial, Through Hole.

STMicroelectronics STTH212 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STTH212 specifications
ParameterValue
Diode typeStandard
MountingThrough Hole
Voltage - DC reverse (Vr)1200 V
Voltage - forward (Vf) (Max) @ if1.75 V @ 2 A
Current - reverse leakage @ vr10 µA @ 1200 V
Current - average rectified2A
Operating temperature - junction175°C(Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageCut Tape (CT); Tape & Box (TB)
CaseDO-201AD, Axial
Reverse recovery time75 ns

Product details

75 ns trr — the scorch-mark tells you

The STTH212 is a 1200 V, 2 A fast-recovery rectifier in a DO-201AD axial-lead package. The junction is rated to 175 °C max, which matters when the part is bolted into a cramped chassis with marginal airflow — the thermal margin is real.

ST lists the STTH212 as Obsolete. If you're repairing a board that carries this diode, the path is either a pin-compatible fast-recovery diode from another manufacturer (same DO-201AD footprint, 1200 V, 2 A, trr ≤ 75 ns) or sourcing remaining stock through independent distribution. The 1.75 V forward drop at 2 A is a check point when selecting a substitute — a part with significantly higher Vf will run hotter in the same hole.

Sourcing the STTH212 today

Because the STTH212 is obsolete, standard distributor shelves are empty.

Frequently asked questions

Is STTH212 obsolete?

Yes. ST lists the STTH212 as Obsolete.

What is the reverse recovery time of STTH212?

The STTH212 has a reverse recovery time (trr) of 75 ns.

What is the difference between STTH212 and STTH112?

The STTH212 is a 1200 V, 2 A rated diode; the STTH112 is a lower-voltage (1200 V, 1 A) variant in the same DO-201AD package. The 2 A current rating of the STTH212 is the key difference for applications needing higher average rectified current.