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Best Alternatives to BAT43WS-7-F

Package: SC-76, SOD-323Diodes IncorporatedDiodes - Rectifiers - SingleSeries: -Package: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Voltage - DC Reverse (Vr) (Max): 30 VCurrent - Average Rectified (Io): 200mAVoltage - Forward (Vf) (Max) @ If: 1 V @ 200 mA

Finding a substitute for the BAT43WS-7-F, a 30V 200mA Schottky diode in a SOD323 package, involves balancing trade-offs. While several pin-compatible options exist, careful review of forward voltage and reverse leakage is critical for a successful replacement.

AI replacement insight

Electrical riskmedium

Candidates may have higher forward voltage (Vf) or reverse leakage current (Ir), impacting circuit efficiency and power consumption.

Package risklow

All suitable candidates are available in the same SOD323 package, ensuring physical compatibility.

Can it be replaced directly?

There is no perfect drop-in replacement. While several parts share the same SOD323 package, all reviewed candidates have different electrical characteristics. ZLLS400TA is a strong candidate that requires engineering review.

Best replacement path

ZLLS400TA is the most promising upgrade path, offering higher voltage and current ratings in the same package. However, its forward voltage may be slightly higher, which requires verification.

Main risk

The primary risk when substituting BAT43WS-7-F is an increase in forward voltage (Vf), which leads to higher power dissipation and lower efficiency.

Recommended alternatives

4
ZLLS400TA package
ZLLS400TA

Diodes Incorporated

Needs validationlow risk

A strong alternative in the same package with higher voltage and current ratings, but forward voltage requires review.

View details

Alternative comparison matrix

Feature / factorBAT43WS-7-FZLLS400TAB0540WS-7SD103AWS-7-FCompatibility / risk
PackageSOD323SOD323SOD323SOD323SOD323 — Package is physically compatible.; B0540WS-7: Package is physically compatible.; SD103AWS-7-F: Package is physically compatible.; ZHCS400TA: Package is physically compatible.
Voltage30V40V40V40V40V — Higher reverse voltage provides more design margin.; B0540WS-7: Higher reverse voltage provides more margin.; SD103AWS-7-F: Higher reverse voltage provides more margin.; ZHCS400TA: Higher reverse voltage provides more margin.
Current200mA520mA500mA350mA520mA / 500mA / 350mA / 400mA — Higher forward current capability.; B0540WS-7: Higher forward current capability.; SD103AWS-7-F: Higher forward current capability.; ZHCS400TA: Higher forward current capability.
Forward Voltage~0.5V @ 200mA (est.)~0.42V @ 200mA~0.45V @ 200mA~0.6V @ 200mA~0.42V @ 200mA / ~0.45V @ 200mA / ~0.6V @ 200mA — Forward voltage is likely higher, increasing power loss. Verify in application.; B0540WS-7: Forward voltage is likely higher, increasing power loss.; SD103AWS-7-F: Forward voltage is significantly higher at operating current, increasing power loss.
Recovery Time5ns3ns-6ns3ns / 6ns — Faster recovery time is generally beneficial.; SD103AWS-7-F: Slightly slower reverse recovery time.
Temperature-55°C to +125°C--40°C to +125°C--40°C to +125°C — Reduced minimum operating temperature.
Reverse Current<5µA (typical)---40µA @ 30V — Significantly higher reverse leakage current may be an issue in low-power applications.

Application & sourcing insights

Questions & answers

The best alternative identified is ZLLS400TA from Diodes Incorporated. It offers higher voltage (40V) and current (520mA) ratings in the same SOD323 package. However, you must verify if its slightly higher forward voltage is acceptable for your application's efficiency and thermal budget.