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STMicroelectronics STTH1212G — Discrete Semiconductors

STTH1212G Fast Recovery Diode, 1200 V, 12 A, 100 ns trr

MPNSTTH1212G
Obsolete

STMicroelectronics STTH1212G, Fast Recovery Rectifier, 1200 V, 12 A, 100 ns trr, D2PAK (TO-263), Surface Mount, Tube.

$2.9200Ref. price · indicative, final on quote
STMicroelectronics STTH1212G datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STTH1212G specifications
ParameterValue
MountingSurface Mount
Voltage - DC reverse (Vr)1200 V
Voltage - forward (Vf) (Max) @ if2.2 V @ 12 A
Current - reverse leakage @ vr10 µA @ 1200 V
Current - average rectified12A
Operating temperature - junction175°C (Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
TechnologyStandard
CaseTO-263-3, D²Pak (2 Leads + Tab), TO-263AB
Reverse recovery time100 ns

Product details

The STMicroelectronics STTH1212G is a 1200 V, 12 A fast recovery rectifier diode in a D2PAK (TO-263) surface-mount package.

100 ns trr at 1200 V — the switching-speed tradeoff

A 100 ns trr at 1200 V is a meaningful spec: it means the diode recovers fast enough for switching frequencies in the tens of kilohertz without excessive turn-off losses. That speed comes with a forward drop of 2.2 V at 12 A, so conduction loss is higher than a slower standard-recovery diode.

STMicroelectronics lists the STTH1212G as Obsolete. No factory orders or last-time-buy windows remain. The only supply channel is independent distribution — surplus inventory, new-old-stock, or broker-sourced lots.

Frequently asked questions

What is the replacement for STTH1212G?

ST does not list an official successor for the STTH1212G. A form-fit-function replacement would need to match the 1200 V reverse voltage, 12 A average current, 100 ns trr, and D2PAK footprint. A parametric search across ST's current fast-recovery diode portfolio or other vendors is the recommended approach.

What are the specifications of STTH1212G?

The STTH1212G is a 1200 V, 12 A fast recovery rectifier with a 100 ns reverse recovery time. Forward voltage is 2.2 V max at 12 A. Reverse leakage is 10 µA at 1200 V. Junction temperature range is up to 175°C. Package is D2PAK (TO-263) for surface mount.