STTH102A
STMicroelectronics
Needs validationlow risk
A potential upgrade with faster switching (20ns trr) and lower power loss (0.78V Vf) in the same SMA package.
Best Alternatives to ES1A
ES1A is a 50V, 1A superfast recovery rectifier in an SMA package. When seeking alternatives, focus on matching or improving the reverse recovery time (trr) of 35ns and forward voltage (Vf) of 1V for optimal performance.
AI replacement insight
Electrical riskmedium
Must match diode type (fast recovery) and check trr/Vf.
Package risklow
SMA is a standard package, but land pattern verification is advised.
Sourcing risklow
Multiple alternatives exist from various manufacturers.
Can it be replaced directly?
Direct replacement for ES1A should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
STTH102A is the best path, offering a performance upgrade. For cost-sensitive applications, US2M is an option but requires careful review of its slower performance.
Main risk
The main risk is substituting with a diode of a different type (like Schottky) or one with a slower reverse recovery time (trr), which can cause circuit malfunction or inefficiency.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | ES1A | STTH102A | STTH110A | US2M | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SMA (DO-214AC) | SMA (DO-214AC) | SMA (DO-214AC) | DO-214AC (SMA) | SMA (DO-214AC) / DO-214AC (SMA) — Package matches.; STTH110A: Package matches.; US2M: Package matches. |
| Voltage | 50V | 200V | 1000V | 1000V | 200V / 1000V — Voltage rating is higher.; STTH110A: Voltage rating is significantly higher.; US2M: Voltage rating is significantly higher. |
| Current | 1A | 1A | 1A | 2A | 1A / 2A — Current rating matches.; STTH110A: Current rating matches.; US2M: Current rating is higher. |
| Trr | 35ns | 20ns | 75ns | 75ns | 20ns / 75ns — Faster recovery time improves switching performance.; STTH110A: Slower recovery time will impact switching speed.; US2M: Slower recovery time will impact switching speed. |
| Vf | ~1V | ~0.78V | ~1.42V | ~1.7V | ~0.78V / ~1.42V / ~1.7V — Lower forward voltage reduces power loss.; STTH110A: Higher forward voltage increases power loss.; US2M: Higher forward voltage increases power loss. |
Application & sourcing insights
Questions & answers
Verified drop-in options for ES1A 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.