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STMicroelectronics STPS1L40AFN — Discrete Semiconductors

STPS1L40AFN Schottky Diode, 40V 1A, SMA Flat Leads

MPNSTPS1L40AFN
Obsolete

STMicroelectronics STPS1L40AFN Schottky rectifier, 40 V Vrrm, 1 A Io, 500 mV Vf at 1 A, fast recovery ≤ 500 ns, surface-mount DO-221AC SMA Flat Leads package.

$7.5400Ref. price · indicative, final on quote
STMicroelectronics STPS1L40AFN datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STPS1L40AFN specifications
ParameterValue
Diode typeSchottky
MountingSurface Mount
Voltage - DC reverse (Vr)40 V
Voltage - forward (Vf) (Max) @ if500 mV @ 1 A
Current - reverse leakage @ vr35 µA @ 40 V
Current - average rectified1A
Operating temperature - junction175°C
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTape & Reel (TR); Cut Tape (CT)
CaseDO-221AC, SMA Flat Leads

Product details

The STMicroelectronics STPS1L40AFN is a 40 V, 1 A Schottky barrier rectifier in the DO-221AC SMA Flat Leads package. It's built for low-voltage, high-frequency rectification — the 500 mV forward drop at 1 A cuts conduction losses in switching power supplies, freewheeling diodes, and polarity protection circuits. Rated junction temperature hits 175°C, so it can sit near hot magnetics or in confined enclosures.

Key specs at a glance

Reverse voltage: 40 V maximum. Average rectified current: 1 A. Forward voltage: 500 mV max at 1 A. Reverse leakage: 35 µA at 40 V. Recovery speed: fast recovery (≤ 500 ns, > 200 mA).

The STPS1L40AFN is marked obsolete. STMicroelectronics no longer manufactures this exact order code. That means no factory lead times, no last-time-buy window — the only channel is independent distribution sourcing existing stock. If you're qualifying a new design, look at current STPS1L-series parts in the same SMA Flat Leads package, though pin-for-pin compatibility should be verified against the footprint.

Frequently asked questions

Is STPS1L40AFN obsolete?

Yes, STPS1L40AFN is obsolete. STMicroelectronics has discontinued production. It is no longer available through factory channels.

What is the replacement for STPS1L40AFN?

STMicroelectronics does not list a direct successor for STPS1L40AFN. For a current-production alternative, look at the STPS1L-series parts in the same SMA Flat Leads package, but verify footprint and electrical compatibility against your design.