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STMicroelectronics STTH20R04G — Discrete Semiconductors

STTH20R04G 400V 20A Fast Recovery Diode, 45ns trr, D2PAK

MPNSTTH20R04G
Obsolete

STMicroelectronics STTH20R04G, fast recovery diode, 400 V reverse, 20 A average, 45 ns trr, D2PAK surface mount.

$1.5300Ref. price · indicative, final on quote
STMicroelectronics STTH20R04G datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STTH20R04G specifications
ParameterValue
MountingSurface Mount
Voltage - DC reverse (Vr)400 V
Voltage - forward (Vf) (Max) @ if1.7 V @ 20 A
Current - reverse leakage @ vr20 µA @ 400 V
Current - average rectified20A
Operating temperature - junction175°C (Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
TechnologyStandard
CaseTO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Reverse recovery time45 ns

Product details

45 ns trr — why it matters for the PFC boost stage

That trr places it in the ultrafast class, suited for hard-switching topologies like power-factor-correction boost converters and secondary-side output rectification in 400 V DC-bus supplies.

Obsolete — no official successor listed

STMicroelectronics lists the STTH20R04G as Obsolete.

Parametric profile for the repair or replacement search

The 400 V DC reverse voltage and 20 A average rectified current define the primary operating envelope. Forward voltage is 1.7 V at 20 A, which sets the conduction loss at full load. Reverse leakage is 20 µA at 400 V. The 45 ns trr is fast enough for switching frequencies typical of PFC stages, but the designer should verify that the recovery charge does not exceed the switching device's SOA.

Frequently asked questions

What is the replacement for STTH20R04G?

Because STTH20R04G is obsolete, buyers urgently need a drop-in or functional equivalent for new designs or repairs.

Is STTH20R04G obsolete?

Confirms lifecycle status so buyers can evaluate risk and prioritize alternatives if needed.

Where to buy STTH20R04G?

Directs sourcing buyers to inventory of new-old-stock (NOS) or distributors still carrying it.

What are the equivalent parts to STTH20R04G?

Provides alternative options from other manufacturers or STMicroelectronics for design flexibility and supply security.

Does STTH20R04G comply with RoHS?

Required for regulatory compliance in many regions; buyers need to confirm before ordering.

What is the pin configuration of STTH20R04G?

Design engineers must verify pinout to ensure PCB layout compatibility before purchase.