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Best Alternatives to 1N5819W

Package: SOD-123Shenzhen SLKOR Micro Semicon Co., Ltd.Diodes - Rectifiers - SingleDiode Type: SchottkyVoltage - DC Reverse (Vr) (Max): 40 VCurrent - Average Rectified (Io): 1 AVoltage - Forward (Vf) (Max) @ If: 0.600 V @ 1 APackage / Case: SOD-123

1N5819W is a 40V 350mA SOD-123 Schottky diode. Several higher-current SOD-123 candidates exist, but pinout and AC parameters need review.

AI replacement insight

Electrical riskmedium

V and Io fit, but Vf, leakage, trr, and capacitance vary.

Package riskmedium

SOD-123 matches for kept parts; orientation still unchecked.

Firmware risklow

Discrete diode, no firmware impact.

Sourcing riskmedium

Some candidates have manufacturer or URL gaps.

Can it be replaced directly?

No direct verified drop-in is confirmed from the available fields.

Best replacement path

Start with MBR0540T1G or MBR0540, then verify pin orientation, Vf, leakage, capacitance, and temperature.

Main risk

Pinout and diode dynamic parameters are not fully checked.

Recommended alternatives

3
MBR0540T1G package
MBR0540T1G

onsemi

Needs validationmedium risk

MBR0540T1G is a 40V 0.5A SOD-123 Schottky alternative with review needed.

View details

Alternative comparison matrix

Feature / factor1N5819WMBR0540T1GLMBR140T1GMBR0540Compatibility / risk
PackageSOD-123SOD-123--SOD-123 — same case
Pinout2 pins2 pins--2 pins — orientation unchecked
Voltage40V40V--40V — same rating
Current0.35A0.5A--1A — higher Io
Temperature125C Tj150C max--150C Tj — ES field

Application & sourcing insights

Questions & answers

MBR0540T1G and MBR0540 are strong candidates, but they still need pinout and datasheet review.