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STMicroelectronics STTH4L06RL — Discrete Semiconductors

STTH4L06RL Fast Recovery Rectifier, 600 V, 4 A, 75 ns trr

MPNSTTH4L06RL
Obsolete

STMicroelectronics STTH4L06RL, Fast Recovery Rectifier, 600 V, 4 A, 75 ns trr, DO-201AD Axial, Through Hole, Tape & Reel.

STMicroelectronics STTH4L06RL datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STTH4L06RL specifications
ParameterValue
Diode typeStandard
MountingThrough Hole
Voltage - DC reverse (Vr)600 V
Voltage - forward (Vf) (Max) @ if1.3 V @ 3 A
Current - reverse leakage @ vr3 µA @ 600 V
Current - average rectified4A
Operating temperature - junction175°C(Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTape & Reel (TR)
CaseDO-201AD, Axial
Reverse recovery time75 ns

Product details

Fast recovery rectifier for PFC and flyback stages

The STTH4L06RL is a 600 V, 4 A fast recovery rectifier from STMicroelectronics in a DO-201AD axial package. Its 75 ns reverse recovery time suits hard-switched power factor correction and flyback output stages where switching losses and EMI need to stay contained. The junction is rated to 175 °C, which gives thermal margin in a cramped PFC boost or secondary-side snubber.

The recovery is soft enough that you won't need a large snubber, but the 3 µA leakage at 600 V rated reverse voltage means the off-state losses stay negligible at high line. At 1.3 V forward drop at 3 A, conduction loss is about 3.9 W at full rated current — the axial DO-201AD body with through-hole mounting needs a reasonable lead length or a clip-on heatsink if you push 4 A continuous in a 50 °C ambient.

STMicroelectronics lists the STTH4L06RL as obsolete.

Frequently asked questions

Is STTH4L06RL obsolete?

Yes, STMicroelectronics lists the STTH4L06RL as obsolete. No official successor has been published. Sourcing is through independent distribution for verified new-old-stock or surplus inventory.

What is the reverse recovery time of STTH4L06RL?

The reverse recovery time is 75 ns, which places it in the fast-recovery class suitable for PFC and flyback applications switching in the 50–100 kHz range.

What package does the STTH4L06RL come in?

It is supplied in a DO-201AD axial-lead package, through-hole mount, on Tape & Reel. The base product number is STTH4L06.