Is there a pin-compatible replacement for ES5JB?

While parts like SD560B exist in the same SMB package, they are standard recovery diodes and not functionally equivalent. Using them in high-frequency circuits is a high risk.

What risks should I check before replacing ES5JB?

The primary risk is recovery time; replacing the fast (35ns) ES5JB with a standard diode can cause overheating and failure. Also verify voltage (≥600V), current (≥5A), and package (SMB/DO-214AA).

ES5JB Alternatives, Datasheet & Cross Reference | ZHIDE

ES5JB is a 600V, 5A fast recovery rectifier in an SMB package. Finding a substitute requires matching voltage, current, package, and the critical 35ns reverse recovery time for use in high-speed applications.

AI replacement insight

Electrical riskhigh

Recovery time mismatch can cause circuit failure.

Package risklow

Some candidates match the SMB package, but others do not.

Can it be replaced directly?

No, a direct, drop-in replacement for ES5JB was not identified. All reviewed candidates have significant functional or physical differences.

Best replacement path

Search for a new candidate with specs: Diode, Rectifier, Vr ≥ 600V, Io ≥ 5A, trr ≤ 35ns, Package = SMB (DO-214AA).

Main risk

The most critical risk is substituting the fast-recovery target with a standard-recovery diode, which is unsuitable for high-frequency switching applications.

Recommended alternatives

Functionally different alternative. Same package, higher voltage, but much slower recovery time. Requires engineering review.

View details

Alternative comparison matrix

Feature / factor	ES5JB	S5MB	SD560B	Compatibility / risk
Package	SMB	SMB	SMB (DO-214AA)	SMB / SMB (DO-214AA) — Package is physically compatible.; SD560B: Package is physically compatible.
Voltage	600V	1000V	600V	1000V / 600V — Higher voltage rating provides more margin.; SD560B: Voltage rating matches the target.
Current	5A	5.0A	5.0A	5.0A — Current rating matches the target.; SD560B: Current rating matches the target.
Recovery Time	Fast Recovery (35ns)	Standard Recovery	Standard Recovery	Standard Recovery — Candidate is a slow standard diode, target is fast (35ns).; SD560B: Candidate is a slow standard diode, target is fast (35ns).
Forward Voltage	1.7V @ 5A	-	1.2V @ 5A	1.2V @ 5A — Lower forward voltage is more efficient.

Application & sourcing insights

Questions & answers

No direct drop-in replacement was found. The best alternative must match the 600V, 5A, SMB package, and fast recovery time (trr ≤ 35ns). Review application needs carefully.