What risks should I check before replacing BAT54H?

When replacing the BAT54H, check the substitute's voltage and current ratings for sufficient margin. Also, compare the forward voltage (Vf) for efficiency and reverse leakage current (Ir) for low-power performance, as deviations can affect your circuit.

BAT54H Alternatives, Datasheet & Cross Reference | Slkor(SLKORMICRO Elec.)

Finding a substitute for the BAT54H Schottky diode involves matching its 30V, 300mA rating and SOD-323 package. Key alternatives offer higher voltage or current ratings, but require careful review of forward voltage and reverse leakage.

AI replacement insight

Package risklow

All top candidates use the same SOD-323 package, ensuring mechanical compatibility.

Electrical riskmedium

Some candidates have higher reverse leakage, which requires careful evaluation for low-power circuits.

Sourcing risklow

Multiple alternatives exist from various manufacturers, mitigating single-source dependency.

Can it be replaced directly?

Direct replacement for BAT54H should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

The most promising path is LBAT40HT1G, which offers improved voltage and current ratings with comparable performance. Other options provide higher power handling but may have trade-offs in leakage current.

Main risk

The main risk is overlooking secondary parameters like reverse leakage current (Ir) or forward voltage (Vf), which can impact circuit efficiency and power consumption.

Recommended alternatives

Strong alternative with higher voltage/current ratings and matching key electricals in the same SOD-323 package.

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Alternative comparison matrix

Feature / factor	BAT54H	LBAT40HT1G	B1040WS	Compatibility / risk
Package	SOD-323	SOD-323	SOD-323	SOD-323 — Same package and pin count.; B1040WS: Same package and pin count.
Voltage	30V	40V	40V	40V — Higher voltage rating provides more safety margin.; B1040WS: Higher voltage rating.
Current	300mA	350mA	1.0A	350mA / 1.0A — Slightly higher current rating.; B1040WS: Significantly higher current rating.
Vf	0.6V @ 200mA	0.6V @ 200mA	-	0.6V @ 200mA — Forward voltage is identical at the same test condition.
Ir	5µA @ 30V	1µA @ 25V	50µA @ 20V	1µA @ 25V / 50µA @ 20V — Lower reverse leakage is an improvement.; B1040WS: Reverse leakage is an order of magnitude higher.

Application & sourcing insights

Questions & answers

Verified drop-in options for BAT54H 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.