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STMicroelectronics STPS640CSFY — Discrete Semiconductors

STPS640CSFY Schottky Diode, 40V 3A, AEC-Q101, TO-277A

MPNSTPS640CSFY
Active

STMicroelectronics STPS640CSFY, Automotive AEC-Q101 Schottky Diode, 40 V, 3 A, 490 mV forward drop at 3 A, Fast Recovery ≤ 500 ns, > 200 mA, TO-277A (SMPC) surface-mount package.

$0.7600Ref. price · indicative, final on quote
STMicroelectronics STPS640CSFY datasheet (PDF)
PackagingTO-277, 3-PowerDFN
SeriesAutomotive, AEC-Q101
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STPS640CSFY specifications
ParameterValue
SeriesAutomotive, AEC-Q101
Diode typeSchottky
MountingSurface Mount
Voltage - DC reverse (Vr)40 V
Voltage - forward (Vf) (Max) @ if490 mV @ 3 A
Current - reverse leakage @ vr75 µA @ 40 V
Current - average rectified3A
Operating temperature - junction-40°C~150°C
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTape & Reel (TR); Cut Tape (CT)
CaseTO-277, 3-PowerDFN

Product details

The STMicroelectronics STPS640CSFY is a 40 V, 3 A Schottky rectifier in a TO-277A (SMPC) surface-mount package, qualified to AEC-Q101 for automotive applications. Typical uses include reverse-battery protection, freewheeling diodes in solenoid and relay drivers, and OR-ing diodes in automotive power distribution modules.

AEC-Q101: the automotive-grade difference

The 'SFY' suffix signals AEC-Q101 qualification, which adds production-part approval process (PPAP) documentation and extended temperature cycling.

It is footprint-compatible with other TO-277 Schottky diodes from ST and competitors, which simplifies second-sourcing. The surface-mount format suits automated assembly lines and reflow soldering.

Frequently asked questions

Does STPS640CSFY meet AEC-Q101 qualification?

Yes, the STPS640CSFY is AEC-Q101 qualified, making it suitable for automotive applications requiring PPAP documentation.

Can STPS640CSFY replace STPS640C?

The STPS640CSFY is the automotive-grade version of the STPS640C. They share the same electrical ratings and TO-277A package, so the CSFY is a direct replacement if your design requires AEC-Q101 qualification. If you do not need automotive documentation, the STPS640C is functionally identical.

What is the typical application for STPS640CSFY?

Typical applications include reverse-battery protection, freewheeling diodes in automotive solenoid and relay drivers, and OR-ing diodes in power distribution modules for 12 V and 24 V vehicle electrical systems.