ProjectsPricingInsights

Best Alternatives to B340B-13-F

Package: DO-214AA, SMBDiodes IncorporatedDiodes - Rectifiers - SingleSeries: Automotive, AEC-Q101Package: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Voltage - DC Reverse (Vr) (Max): 40 VCurrent - Average Rectified (Io): 3AVoltage - Forward (Vf) (Max) @ If: 500 mV @ 3 A

Finding a substitute for the B340B-13-F, a 40V 3A Schottky diode in an SMB package, involves matching its low forward voltage and high surge capability. Several alternatives exist with specific trade-offs to consider.

AI replacement insight

Electrical riskmedium

Mismatch in forward voltage (Vf) or surge current (Ifsm) can cause inefficiency or failure.

Package risklow

Many alternatives exist in the same SMB package, ensuring mechanical compatibility.

Can it be replaced directly?

Direct replacement for B340B-13-F should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

B340LB-13-F is the best replacement path as it matches nearly all key parameters, but its lower surge current rating (70A vs 100A) must be verified.

Main risk

The main risk when substituting is either choosing a part with a lower surge current rating (like B340LB-13-F) or a part with higher forward voltage, which increases power loss (like SDT5H100SB-13).

Recommended alternatives

2
B340LB-13-F package
B340LB-13-F

Diodes Incorporated

Needs validationlow risk

A strong match with the same package, voltage, and current, but a lower surge current rating that needs review.

View details

Alternative comparison matrix

Feature / factorB340B-13-FB340LB-13-FSDT5H100SB-13Alt 3Compatibility / risk
PackageSMBSMBSMBSMB — Form factor matches.; SDT5H100SB-13: Form factor matches.
TechnologySchottkySchottkyTrench SchottkySchottky / Trench Schottky — Diode technology matches.; SDT5H100SB-13: Diode technology is compatible.
Voltage40V40V100V40V / 100V — Reverse voltage rating matches.; SDT5H100SB-13: Higher voltage rating provides more margin.
Current3.0A3.0A5.0A3.0A / 5.0A — Forward current rating matches.; SDT5H100SB-13: Higher current rating provides more margin.
Forward Voltage0.50V0.45V0.62V0.45V / 0.62V — Lower Vf improves efficiency.; SDT5H100SB-13: Higher Vf increases power dissipation.
Surge Current100A70A-70A — Lower surge rating requires review for inrush current handling.

Application & sourcing insights

Questions & answers

Verified drop-in options for B340B-13-F 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.