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STTH506DTI

STTH506DTI 600V 5A Fast Recovery Diode, 25ns trr, TO-220AC

MPNSTTH506DTI
Active

STMicroelectronics STTH506DTI, Fast Recovery =< 500ns, > 200mA (Io), Diode Type Standard, Through Hole, TO-220-2 Insulated, TO-220AC, 25 ns trr, 600 V, 5 A, 175°C max junction.

$3.6000Ref. price · indicative, final on quote
STMicroelectronics STTH506DTI datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STTH506DTI specifications
ParameterValue
Diode typeStandard
MountingThrough Hole
Voltage - DC reverse (Vr)600 V
Voltage - forward (Vf) (Max) @ if3.6 V @ 5 A
Current - reverse leakage @ vr6 µA @ 600 V
Current - average rectified5A
Operating temperature - junction175°C(Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
CaseTO-220-2 Insulated, TO-220AC
Reverse recovery time25 ns

Product details

25 ns trr — the switching-speed decision

That 25 ns trr is the headline number: it tells you this is a diode built for the output stage of a hard-switched power supply, not a 50/60 Hz line rectifier. The fast recovery cuts turn-off losses in continuous-conduction-mode boost or flyback converters, which is where a standard recovery part would run hot and eat efficiency.

Forward drop and leakage at the operating point

Forward voltage is 3.6 V maximum at 5 A — a typical figure for a fast-recovery diode at that current and voltage class. Reverse leakage is 6 µA at the 600 V rating, measured at 25 °C junction.

Housed in a TO-220AC insulated package (TO-220-2 with the tab electrically isolated), this is a through-hole part. The base number STTH506 covers the non-insulated TO-220AC variant; the 'DTI' suffix flags the insulated version.

No last-time-buy risk or obsolescence concern on the horizon for this part.

Frequently asked questions

What is the reverse recovery time of STTH506DTI?

The reverse recovery time (trr) is 25 ns. This qualifies it as a fast-recovery diode suitable for switching frequencies above 100 kHz in typical power supply topologies.

What is the closest pin-compatible alternative to STTH506DTI?

The STTH506 (non-insulated TO-220AC) is the closest pin-compatible variant within the same family. It shares the same die and electrical ratings but lacks the insulated tab. For a drop-in replacement with different trr, the STTH5L06 (lower forward drop, slower trr) or STTH5R06 (ultrafast) are worth evaluating, though each has a different recovery characteristic.