BAT54S
RECTRON
Needs validationlow risk
BAT54S is a common cross-vendor replacement in a SOT-23 package with matching electrical ratings.
Best Alternatives to LBAT54SLT1G
The LBAT54SLT1G is a 30V, 200mA dual series Schottky diode in a SOT-23 package for high-speed switching. The BAT54S is a strong pin-compatible replacement, but other alternatives require careful review of diode technology.
AI replacement insight
Package risklow
SOT-23 is a standard package with many options.
Electrical riskhigh
Using a non-Schottky diode will significantly increase forward voltage (Vf), which is critical in clamping and low-loss applications.
Sourcing risklow
The BAT54S is a very common, multi-sourced component.
Can it be replaced directly?
Yes, the BAT54S is a widely recognized direct replacement for the LBAT54SLT1G, offering the same package, pinout, and electrical characteristics.
Best replacement path
Source a BAT54S from a reputable manufacturer, as it is a widely available, multi-source, pin-compatible part.
Main risk
The primary risk is accidentally substituting with a standard switching diode (like a 4148 type) instead of a Schottky, leading to much higher forward voltage and potential circuit malfunction.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | LBAT54SLT1G | BAT54S | LBAV99LT1G | MMBD4148SE | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23 | SOT-23 | - | - | SOT-23 — Package matches. |
| Pinout | 1 Pair Series | 1 Pair Series | - | - | 1 Pair Series — Configuration matches. |
| Voltage | 30V | 30V | - | - | 100V — Higher voltage rating provides more margin. |
| Current | 200mA | 200mA | - | - | 215mA — Slightly higher current rating. |
| Application | Schottky | Schottky | - | - | Standard Switching — Higher Vf (~1V vs target's ~0.35V). |
Application & sourcing insights
Questions & answers
The best alternative is the BAT54S. It is a multi-source, pin-compatible Schottky diode array with matching package, voltage, and current ratings.