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STMicroelectronics STTH8L06D — Discrete Semiconductors

STTH8L06D 600V 8A Ultrafast Diode, 105ns trr, TO-220AC

MPNSTTH8L06D
Active

STMicroelectronics STTH8L06D, Ultrafast Recovery Diode, Standard, 600 V, 8 A, 105 ns trr, 1.3 Vf @ 8 A, Through Hole, TO-220-2, TO-220AC, 175°C Junction.

$1.6300Ref. price · indicative, final on quote
STMicroelectronics STTH8L06D datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STTH8L06D specifications
ParameterValue
Diode typeStandard
MountingThrough Hole
Voltage - DC reverse (Vr)600 V
Voltage - forward (Vf) (Max) @ if1.3 V @ 8 A
Current - reverse leakage @ vr8 µA @ 600 V
Current - average rectified8A
Operating temperature - junction175°C(Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
CaseTO-220-2
Reverse recovery time105 ns

Product details

105 ns trr — the spec that keeps the boost stage cool

That trr figure is what separates this from a standard 50/60 Hz rectifier — it's sized for the hard-switching node of a PFC boost, a flyback clamp, or a motor-drive freewheel path where the diode's turn-off loss directly heats the heatsink. The TO-220AC package (TO-220-2 outline) keeps the thermal path through the tab straightforward for a clip or screw mount.

Forward drop at full load

Maximum forward voltage is 1.3 V at 8 A, which at full rated current puts conduction loss near 10.4 W before switching losses are added. At lighter loads the Vf drops, so average dissipation in a discontinuous-mode PFC is lower than the 8 A continuous figure suggests.

Leakage at rated voltage

It does confirm the die quality — a leaky junction at rated voltage would show up here first. The 600 V rating leaves margin for 400 V bus applications (PFC output, inverter DC link) where transients can ring above the nominal rail.

Frequently asked questions

What is the reverse recovery time of STTH8L06D?

The reverse recovery time (trr) is 105 ns, which classifies this as an ultrafast recovery diode suitable for switching frequencies where a standard recovery part would overheat.