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STMicroelectronics STTH15S12D — Discrete Semiconductors

STTH15S12D Fast Recovery Diode, 1200V 15A TO-220AC

MPNSTTH15S12D
Active

STMicroelectronics STTH15S12D, Fast Recovery Diode, Standard Type, 1200V DC Reverse, 15A Average Rectified, 40ns trr, TO-220AC, Through Hole, Tube.

$1.8000Ref. price · indicative, final on quote
STMicroelectronics STTH15S12D datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STTH15S12D specifications
ParameterValue
Diode typeStandard
MountingThrough Hole
Voltage - DC reverse (Vr)1200 V
Voltage - forward (Vf) (Max) @ if3.1 V @ 15 A
Current - reverse leakage @ vr10 µA @ 1200 V
Current - average rectified15A
Operating temperature - junction175°C(Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
CaseTO-220-2
Reverse recovery time40 ns

Product details

1200 V, 15 A, 40 ns — the PFC and snubber diode

The STTH15S12D is a fast-recovery epitaxial diode from STMicroelectronics, rated for 1200 V reverse voltage and 15 A average rectified current in a TO-220AC through-hole package.

40 ns trr at 1200 V — switching loss anchor

The 40 ns trr is specified at the full 15 A forward current and 1200 V blocking voltage.

175°C junction — thermal headroom in a TO-220AC

Rated for a maximum junction temperature of 175°C, the STTH15S12D can run hotter than the common 150°C-grade fast diodes. In a TO-220AC package with a heatsink, that extra 25°C headroom translates to either higher output current in the same thermal environment or a smaller heatsink for a given load. The 10 µA reverse leakage at 1200 V is a room-temperature figure; at 175°C junction, expect leakage to rise — budget for it in the bias supply design.

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STTH15S12D datasheet

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