Skip to main content
Log in
STMicroelectronics STTH1212D — Discrete Semiconductors

STTH1212D Fast Recovery Diode, 1.2 kV, 12 A, TO-220AC

MPNSTTH1212D
Active

STMicroelectronics STTH1212D, standard fast recovery diode, 1.2 kV reverse voltage, 12 A average rectified current, 100 ns reverse recovery time, TO-220AC through-hole package.

$2.9500Ref. price · indicative, final on quote
STMicroelectronics STTH1212D datasheet (PDF)
PackagingTO-220-2
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STTH1212D specifications
ParameterValue
Diode typeStandard
MountingThrough Hole
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
CaseTO-220-2
Reverse recovery time100 ns

Product details

1.2 kV, 12 A fast recovery rectifier in TO-220AC

The STTH1212D is a standard fast recovery diode from STMicroelectronics, rated for 1.2 kV reverse voltage and 12 A average rectified current in a TO-220AC through-hole package. Its 100 ns reverse recovery time (trr) places it in the fast recovery class, making it suitable for switching power supplies and freewheeling circuits where recovery losses matter.

Forward drop and leakage at rated voltage

Reverse leakage is specified at 10 µA at 1.2 kV, which is low for a 1.2 kV device and indicates good high-voltage blocking stability at temperature.

Active production, through-hole assembly

The TO-220AC package is a standard through-hole form factor for power rectifiers — the tab is the cathode, and the mounting hole accepts a #6 screw for heatsink attachment.

Frequently asked questions

What is the reverse recovery time of STTH1212D?

The STTH1212D has a reverse recovery time (trr) of 100 ns, which qualifies as fast recovery (≤ 500 ns at > 200 mA).