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Best Alternatives to BAT54KFILM

Package: SC-79, SOD-523STMicroelectronicsDiodes - Rectifiers - SingleSeries: -Package: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Voltage - DC Reverse (Vr) (Max): 40 VCurrent - Average Rectified (Io): 300mAVoltage - Forward (Vf) (Max) @ If: 900 mV @ 100 mA

Find substitutes for the BAT54KFILM, a 40V 300mA Schottky diode in a SOD-523 package. Review key parametric differences like current, temperature, and capacitance before selection.

AI replacement insight

Electrical riskhigh

Capacitance and temperature differences are significant in most candidates.

Package risklow

All reviewed candidates use the same SOD-523 package.

Sourcing riskmedium

Candidates are from various manufacturers; availability may differ.

Can it be replaced directly?

No direct drop-in replacement has been verified. All candidates have parametric differences requiring engineering review, primarily in capacitance and operating temperature.

Best replacement path

The most promising path is 1N5819WT due to its matching temperature range, but requires datasheet verification for capacitance.

Main risk

The main risk is increased diode capacitance, which can degrade or cause failure in high-frequency switching circuits where the BAT54KFILM is often used.

Recommended alternatives

3
1N5819WT package
1N5819WT

Slkor(SLKORMICRO Elec.)

Needs validationmedium risk

A potential alternative with matching temperature range and higher current, but diode capacitance must be verified.

View details

Alternative comparison matrix

Feature / factorBAT54KFILM1N5819WTB1040XSD103AWTCompatibility / risk
PackageSOD-523SOD-523SOD-523SOD-523SOD-523 — Package matches.; B1040X: Package matches.; SD103AWT: Package matches.
Voltage40V40V40V40V40V — Reverse voltage matches.; B1040X: Reverse voltage matches.; SD103AWT: Reverse voltage matches.
Current0.3A0.35A1.0A0.35A0.35A / 1.0A — Slightly higher current rating.; B1040X: Higher current rating provides more margin.; SD103AWT: Slightly higher current rating.
Temperature-40°C to +150°C-55°C to +150°C-40°C to +125°C-65°C to +125°C-55°C to +150°C / -40°C to +125°C / -65°C to +125°C — Operating temperature range matches target.; B1040X: Reduced maximum operating temperature.; SD103AWT: Reduced maximum operating temperature.
Capacitance7pFNot specified19pF50pFNot specified / 19pF / 50pF — Must be verified from datasheet.; B1040X: Higher capacitance may impact high-frequency performance.; SD103AWT: Significantly higher capacitance, unsuitable for fast switching.

Application & sourcing insights

Questions & answers

The 1N5819WT is a promising functional alternative with a matching temperature range and higher current rating, but its capacitance must be verified. Other parts like B1040X offer higher current but have different temperature and capacitance ratings.