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Best Alternatives to B1040WS

Package: SOD-323Jiangsu Changjing Electronics Technology Co., Ltd.Diodes - Rectifiers - SingleDiode Type: SchottkyVoltage - DC Reverse (Vr) (Max): 40 VCurrent - Average Rectified (Io): 1 AForward Voltage (Vf) (Max) @ If: 0.55 V @ 0.7 AReverse Leakage Current (Ir) @ Vr: 50 uA @ 20 V

Finding a replacement for the B1040WS, a 40V 1A Schottky diode in a SOD-323 package, involves matching key electrical ratings and physical footprint. Several pin-compatible alternatives exist.

AI replacement insight

Electrical risklow

Ensure forward voltage (Vf) and reverse leakage (Ir) are compatible with the application.

Package risklow

SOD-323 is a standard package, but always verify land pattern dimensions.

Can it be replaced directly?

Direct replacement for B1040WS should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Start with Datasheet verified or Strong match candidates for B1040WS, then review parametric alternatives for package and electrical fit.

Main risk

The main risk is ensuring the replacement has a similarly low forward voltage (Vf) to maintain circuit efficiency, as this is a key feature of Schottky diodes.

Recommended alternatives

5
1N5819WS(SL) package
1N5819WS(SL)

KEXIN

Needs validationlow risk

Offers matching key parameters including 40V, 1A, and SOD-323 package, making it a strong candidate for direct replacement.

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Alternative comparison matrix

Feature / factorB1040WS1N5819WS(SL)B16WSK1N5819HWS-7-FCompatibility / risk
Voltage40V40V60V40V40V / 60V — matched; B16WS: Candidate has higher voltage rating, a safe upgrade.; K1N5819HWS-7-F: matched; MS2A40LWS: matched
Current1.0A1.0A1.0A1.0A1.0A / 2.0A — matched; B16WS: matched; K1N5819HWS-7-F: matched; MS2A40LWS: Candidate has higher current rating, a safe upgrade.
PackageSOD-323SOD-323SOD-323SOD-323SOD-323 — Pinout assumed compatible, requires verification.; B16WS: Pinout assumed compatible, requires verification.; K1N5819HWS-7-F: matched; MS2A40LWS: matched
Polarity Or TypeSchottkySchottkySchottkySchottkySchottky — matched; B16WS: matched; K1N5819HWS-7-F: Type confirmed from summary, despite data error in specs.; MS2A40LWS: Type confirmed from summary, despite data error in specs.

Application & sourcing insights

Questions & answers

Verified drop-in options for B1040WS are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.