Is there a pin-compatible replacement for ES1K?

Yes, parts like US1M and HS2MA are pin-compatible in the same DO-214AC (SMA) package. However, their electrical performance, specifically recovery time, is different and must be verified.

What risks should I check before replacing ES1K?

The main risk is the slower reverse recovery time (trr). Check if your circuit can tolerate a trr of 75ns instead of 35ns, as this can affect switching efficiency, EMI, and performance in high-frequency power supplies.

ES1K Alternatives, Datasheet & Cross Reference | Yangjie Technology

ES1K is a 1A, 800V super-fast recovery rectifier in a DO-214AC (SMA) package, designed for high-frequency applications. Finding a replacement requires careful matching of its 35ns recovery time.

AI replacement insight

Electrical riskmedium

Slower recovery time can impact high-frequency switching performance.

Package risklow

Candidates share the same DO-214AC (SMA) package.

Can it be replaced directly?

No direct drop-in replacement with identical performance was found. Alternatives like US1M and HS2MA have a slower reverse recovery time (75ns vs 35ns).

Best replacement path

Evaluate US1M or HS2MA, which are form-fit compatible ultrafast diodes. Verify if the slower 75ns recovery time is acceptable for the application.

Main risk

The primary risk is increased switching losses and potential circuit malfunction due to the slower reverse recovery time of available alternatives.

Recommended alternatives

A form-fit compatible diode with higher voltage/current ratings but slower recovery time. Verify circuit timing requirements.

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Alternative comparison matrix

Feature / factor	ES1K	HS2MA	US1M	Compatibility / risk
Package	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA) — Same package and pinout.; US1M: Same package and pinout.
Voltage	800V	1000V	1000V	1000V — Higher voltage rating provides more margin.; US1M: Higher voltage rating provides more margin.
Current	1.0A	2.0A	1.0A	2.0A / 1.0A — Higher current rating.; US1M: Same current rating.
Recovery Time	35ns	75ns	75ns	75ns — Slower recovery time, may affect switching efficiency.; US1M: Slower recovery time, may affect switching efficiency.

Application & sourcing insights

Questions & answers

Candidates like US1M and HS2MA are strong functional alternatives in the same package. They have higher voltage ratings but a slower recovery time (75ns vs 35ns), which requires engineering review.