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STMicroelectronics STTH4R02U — Discrete Semiconductors

STTH4R02U 200V 4A Fast Recovery Diode, 30ns trr, SMB

MPNSTTH4R02U
Active

STMicroelectronics STTH4R02U, standard fast recovery diode, 200 V Vr, 4 A Io, 30 ns trr, 1.05 V Vf, DO-214AA SMB, surface mount.

$0.9900Ref. price · indicative, final on quote
STMicroelectronics STTH4R02U datasheet (PDF)
PackagingDO-214AA, SMB
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STTH4R02U specifications
ParameterValue
Diode typeStandard
MountingSurface Mount
Voltage - DC reverse (Vr)200 V
Voltage - forward (Vf) (Max) @ if1.05 V @ 4 A
Current - reverse leakage @ vr3 µA @ 200 V
Current - average rectified4A
Operating temperature - junction175°C(Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTape & Reel (TR); Cut Tape (CT)
CaseDO-214AA, SMB
Reverse recovery time30 ns

Product details

200 V, 4 A fast recovery — the 30 ns trr is the gate

The STTH4R02U is a standard fast recovery diode from STMicroelectronics, rated for 200 V reverse voltage and 4 A average rectified current. Its 30 ns reverse recovery time (trr) places it in the fast-recovery class for switching power supplies where the diode's turn-off speed directly sets the snubber loss and ringing amplitude.

Forward drop and thermal budget at 4 A

Maximum forward voltage is 1.05 V at 4 A, which at full rated current gives a conduction loss of about 4.2 W before any derating.

Active production, ROHS3, SMB footprint

No LTB notice or successor has been published — the part is a standard catalog item for ongoing designs.

Frequently asked questions

Is STTH4R02U a suitable replacement for STTH4R02?

The STTH4R02U is the SMB-packaged variant of the base STTH4R02. The 'U' suffix denotes the DO-214AA package; the base part number STTH4R02 may refer to a different package (e.g., DO-201AD through-hole). Electrically the die is the same — 200 V, 4 A, 30 ns trr — but the footprint differs. Confirm the BOM's package before substituting.

Does STTH4R02U have lead-free plating?

The termination finish is matte tin over nickel barrier — standard lead-free for reflow soldering.