
Fairchild Semiconductor
Pin-compatible with a higher voltage rating, but higher forward voltage requires thermal review.
ES1D_R1_00001 is a 200V, 1A superfast recovery diode in a popular SMA package. This page reviews and compares potential substitutes, highlighting key parametric differences for engineers.
Candidates may have different forward voltage or recovery times, impacting efficiency and performance.
Most top candidates use the same SMA package, but verification is always recommended.
Direct replacement for ES1D_R1_00001 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
ES1D from other manufacturers like onsemi is the most direct, pin-to-pin replacement.
The main risk when substituting is mismatching the reverse recovery time (trr) or forward voltage (Vf), which can affect circuit efficiency and timing.

Fairchild Semiconductor
Pin-compatible with a higher voltage rating, but higher forward voltage requires thermal review.
| Feature / factor | ES1D_R1_00001 | ES1D | ES1G | US1G | Compatibility / risk |
|---|---|---|---|---|---|
| Package | DO-214AC, SMA | DO-214AC, SMA | DO-214AC (SMA) | DO-214AC, SMA | DO-214AC, SMA / DO-214AC (SMA) — Same form factor.; ES1G: Same form factor.; US1G: Same form factor. |
| Voltage | 200V | 200V | 400V | 400V | 200V / 400V — Same voltage rating.; ES1G: Higher voltage provides more margin.; US1G: Higher voltage provides more margin. |
| Current | 1A | 1A | 1A | 1A | 1A — Same current rating.; ES1G: Same current rating.; US1G: Same current rating. |
| Recovery Time | 35ns | ~35ns | 35ns | 50ns | ~35ns / 50ns — Matches superfast recovery speed.; ES1G: Matches superfast recovery speed.; US1G: Slower recovery may not work in high-frequency applications. |
| Forward Voltage | 0.95V | ~0.92V | 1.3V | - | ~0.92V / 1.3V — Very similar Vf, minimal impact on efficiency.; ES1G: Higher Vf increases power loss. |
Verified drop-in options for ES1D_R1_00001 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.