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STMicroelectronics STPS3L25S — Discrete Semiconductors

STPS3L25S Schottky Rectifier, 3A 25V DO-214AB SMC, Obsolete

MPNSTPS3L25S
Obsolete

STMicroelectronics STPS3L25S Schottky rectifier, 3 A average rectified current, 25 V reverse voltage, 490 mV forward drop at 3 A, DO-214AB SMC package, surface mount.

$0.4300Ref. price · indicative, final on quote
STMicroelectronics STPS3L25S datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STPS3L25S specifications
ParameterValue
MountingSurface Mount
Voltage - DC reverse (Vr)25 V
Voltage - forward (Vf) (Max) @ if490 mV @ 3 A
Current - reverse leakage @ vr90 µA @ 25 V
Current - average rectified3A
Operating temperature - junction150°C (Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTape & Reel (TR) Cut Tape (CT)
TechnologySchottky
CaseDO-214AB, SMC

Product details

3 A Schottky for low-voltage rails — what the ratings mean

The STMicroelectronics STPS3L25S is a 3 A, 25 V Schottky rectifier in a DO-214AB SMC package. Its 490 mV forward drop at the full 3 A rating keeps conduction losses low, which matters when you are rectifying a 5 V or 12 V rail and every 100 mV of drop eats into efficiency. The 25 V reverse voltage limits it to low-voltage DC applications — think secondary-side rectification in a flyback converter, OR-ing diodes in a redundant supply, or reverse-polarity protection on a 12 V bus. The SMC footprint is larger than a SOD-123, so it sheds heat better through the PCB copper, but you still want a decent pad area under the part.

If you have a BOM line that calls out this exact order code, you are looking at last-time-buy inventory already in distribution channels. For a production run, budget time for a substitution review.

Hand-soldering the SMC package

The DO-214AB SMC is a surface-mount package with large end-cap terminations. Just pre-tin one pad, position the diode, reflow that joint, then solder the other side. The SMC body is about 7 mm long, so it takes up more board space than a SOD-123FL, but the extra copper area helps with thermal spreading. No special baking needed unless the reel has been open past the MSL floor life.

Frequently asked questions

Is STPS3L25S obsolete?

Yes, the STPS3L25S is listed as obsolete. STMicroelectronics has discontinued production, so new stock is only available through independent surplus distribution. Plan for a replacement qualification if you need ongoing supply.

What is the replacement for STPS3L25S?

No official replacement is listed on the record. You will need to cross-reference a Schottky diode with the same ratings: 3 A average rectified current, 25 V reverse voltage, and a DO-214AB SMC package. Look at other ST Schottky series or vendors like ON Semiconductor or Diodes Inc for a pin-compatible alternative.

Can I use STPS3L25S in a 5V circuit?

Yes, the 25 V reverse voltage rating comfortably covers a 5 V rail with plenty of headroom. The 490 mV forward drop at 3 A means you lose under half a volt, which is acceptable for most 5 V designs. Just watch the junction temperature — the maximum is 150°C, so size the PCB copper accordingly if you are pushing the full 3 A.

What package is STPS3L25S?

It comes in a DO-214AB SMC surface-mount package.