Is there a pin-compatible replacement for E1D?

F1M shares the same SOD-123FL package and pinout, but it is a standard recovery diode (500ns trr) and not a functional equivalent to the super-fast E1D (35ns trr). Using it may cause circuit failure in high-frequency designs.

What risks should I check before replacing E1D?

The most critical risk is mismatching the reverse recovery time (trr); the E1D is a super-fast diode (35ns). Also verify the package footprint (SOD-123FL), forward voltage (Vf) for thermal impact, and ensure the replacement's voltage and current ratings are sufficient.

E1D Alternatives, Datasheet & Cross Reference | Yangjie Technology

The E1D is a 200V, 1A super-fast recovery diode in a SOD-123FL package, ideal for high-frequency power applications. Finding a direct drop-in replacement requires careful matching of its 35ns recovery time.

AI replacement insight

Package riskhigh

The best functional alternatives require a board redesign.

Electrical riskhigh

Drop-in package options have critical recovery time mismatch.

Sourcing riskmedium

Functional alternatives exist but are not direct drop-ins.

Can it be replaced directly?

No direct, drop-in replacement with matching performance was found. Candidates with the same package have much slower recovery times, posing a high risk.

Best replacement path

A board redesign for MURS360B offers the best functional match. If no redesign is possible, a new search for a super-fast diode in a SOD-123FL package is needed.

Main risk

The primary risk is substituting a standard recovery diode for the target's super-fast recovery time, which can lead to circuit malfunction and overheating.

Recommended alternatives

A strong functional alternative with similar speed and better ratings, but requires a new PCB layout.

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Alternative comparison matrix

Feature / factor	E1D	MURS360B	US1K	F1M	Compatibility / risk
Package	SOD-123FL	DO-214AA (SMB)	SMA (DO-214AC)	SOD-123FL	DO-214AA (SMB) / SMA (DO-214AC) / SOD-123FL — Different package requires board redesign.; US1K: Different package requires board redesign.; F1M: Package matches, enabling potential drop-in.
Voltage	200V	600V	800V	1000V	600V / 800V / 1000V — Voltage rating is higher.; US1K: Voltage rating is higher.; F1M: Voltage rating is higher, providing more margin.
Current	1A	3A	-	1A	3A / 1A — Current rating is higher.; F1M: Current rating matches the target.
Recovery Time	35ns	50ns	75ns	500ns	50ns / 75ns / 500ns — Slightly slower but comparable recovery time.; US1K: Slower recovery time (Ultrafast vs Super Fast).; F1M: Much slower recovery time (Fast vs Super Fast).
Forward Voltage	1.0V	-	1.7V	1.3V	1.7V / 1.3V — Significantly higher forward voltage increases power loss.; F1M: Higher forward voltage increases power loss.

Application & sourcing insights

Questions & answers

MURS360B is a strong functional alternative with similar recovery time and higher ratings, but it requires a board redesign due to its different package (SMB). For a drop-in replacement, F1M has the same package but is a significant performance downgrade.