BAS40-04-7-F
Diodes Incorporated
Needs validationmedium risk
A functional alternative in the same SOT23 package, but with higher forward voltage and a different temperature range.
Best Alternatives to BAT54STA
BAT54STA is a popular 30V, 200mA dual series Schottky diode in a SOT23 package from Diodes Inc., used for fast switching and protection circuits. Finding a replacement involves matching the configuration, package, and key electrical ratings.
AI replacement insight
Electrical riskhigh
Forward voltage and temperature differences are common in alternatives and require validation.
Package riskmedium
While SOT23 is common, pinout for dual diodes must be verified. Smaller packages require redesign.
Sourcing risklow
Dual Schottky diodes are a widely available component category from multiple vendors.
Can it be replaced directly?
No direct, drop-in replacement for BAT54STA has been identified. All known alternatives have parametric differences or different packages requiring engineering review.
Best replacement path
Evaluate other dual series Schottky diodes in SOT23 packages, like BAS40-04-7-F, while carefully validating the impact of its higher forward voltage.
Main risk
The primary risk is electrical incompatibility, specifically higher forward voltage (Vf) in alternatives, which can impact circuit performance and efficiency.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | BAT54STA | BAS40-04-7-F | BAT54ST-7-F | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT23 | SOT23 | SOT523 | SOT23 / SOT523 — Package matches, pinout assumed to match dual series configuration but requires verification.; BAT54ST-7-F: Smaller package requires PCB layout change. | |
| Voltage | 30V | 40V | 30V | 40V / 30V — Higher voltage rating provides more margin.; BAT54ST-7-F: Voltage rating matches. | |
| Forward Voltage | 0.8V | 1.0V | 1.0V | 1.0V — Higher forward voltage may impact efficiency or signal levels.; BAT54ST-7-F: Higher forward voltage may impact efficiency. | |
| Current | 200mA | 200mA | 200mA | 200mA — Continuous forward current matches.; BAT54ST-7-F: Continuous forward current matches. | |
| Temperature | -65°C to +150°C | -55°C to +125°C | - | -55°C to +125°C — Reduced maximum operating temperature. |
Application & sourcing insights
Questions & answers
BAS40-04-7-F is a potential alternative in the same package, but has a higher forward voltage and a narrower temperature range that must be verified for your application.