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STMicroelectronics STPS3L40S — Discrete Semiconductors

STPS3L40S Schottky Diode 40V 3A SMC Active

MPNSTPS3L40S
Active

STMicroelectronics STPS3L40S Schottky diode, 40 V reverse voltage, 3 A average rectified current, fast recovery ≤500 ns, 500 mV forward drop at 3 A, DO-214AB SMC package, surface mount.

$0.8800Ref. price · indicative, final on quote
STMicroelectronics STPS3L40S datasheet (PDF)
PackagingDO-214AB, SMC
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STPS3L40S specifications
ParameterValue
Diode typeSchottky
MountingSurface Mount
Voltage - DC reverse (Vr)40 V
Voltage - forward (Vf) (Max) @ if500 mV @ 3 A
Current - reverse leakage @ vr100 µA @ 40 V
Current - average rectified3A
Operating temperature - junction150°C(Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTape & Reel (TR); Cut Tape (CT)
CaseDO-214AB, SMC

Product details

3 A Schottky in an SMC body — the footprint trade-off

The STPS3L40S is an STMicroelectronics Schottky rectifier rated 40 V reverse voltage and 3 A average rectified current, in the SMC package. The SMC footprint is larger than the SMA or SMB typically used for 3 A Schottkys, which gives the designer more copper area for heat sinking without needing a separate heatsink.

The recovery time is listed as ≤500 ns at >200 mA. For a Schottky diode the recovery is majority-carrier dominated, so the stored charge is minimal — the 500 ns ceiling is conservative. In a 100 kHz boost or flyback converter the reverse recovery loss is negligible, and the diode does not force a dead-time penalty.

The base product number STPS3 covers a family of 3 A Schottkys; the L40 variant is the 40 V grade in the SMC package.

Frequently asked questions

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What is the datasheet for STPS3L40S?

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Is STPS3L40S equivalent to SS34?

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