Is there a pin-compatible replacement for MURA110T3G?

Yes, several parts are pin-compatible as they use the same standard SMA (DO-214AC) package. MURA220T3G and MBRA2H100T3G are both pin-compatible. However, pin compatibility does not guarantee functional compatibility; you must verify the electrical parameters, especially the recovery time.

What risks should I check before replacing MURA110T3G?

The main risk is substituting a diode with a slower reverse recovery time (trr). The target is an 'ultrafast' diode (30ns); using a 'fast' (150-500ns) or 'standard' (>1us) diode will cause excessive power loss and potential failure in high-frequency circuits. Also, if considering a Schottky diode, you must check if your circuit can tolerate its higher reverse leakage current.

MURA110T3G Alternatives, Datasheet & Cross Reference | onsemi

Finding a replacement for the MURA110T3G ultrafast rectifier requires matching its 100V/1A rating, SMA package, and critical 30ns reverse recovery time. While no exact cross exists, strong alternatives are available that may involve minor tradeoffs in speed or a change in diode technology, requiring engineering review.

AI replacement insight

Electrical riskhigh

Using a standard or fast recovery diode instead of an ultrafast one will cause overheating and failure.

Package risklow

The SMA (DO-214AC) package is highly standardized, making physical replacement straightforward.

Sourcing risklow

The target and its best alternatives are from a major manufacturer (onsemi) and are widely available.

Can it be replaced directly?

There is no known exact drop-in replacement. However, onsemi's MURA220T3G is a very strong candidate that is pin-compatible and functionally similar, requiring only minor parametric verification.

Best replacement path

MURA220T3G is the most promising path, offering upgraded voltage and current with only a minor tradeoff in recovery speed. It should be the first candidate to evaluate.

Main risk

The primary risk is substituting a diode with a significantly slower reverse recovery time (trr), which can lead to circuit failure in high-frequency applications.

Recommended alternatives

A strong alternative with upgraded voltage and current, but a slightly slower recovery time that needs review.

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Alternative comparison matrix

Feature / factor	MURA110T3G	MURA220T3G	MBRA2H100T3G	RS1M	Compatibility / risk
Package	SMA (DO-214AC)	SMA (DO-214AC)	SMA (DO-214AC)	SMA (DO-214AC)	SMA (DO-214AC) — Form and fit are identical.; MBRA2H100T3G: matched; RS1M: Form and fit are identical.
Voltage	100V	200V	100V	1000V	200V / 100V / 1000V — Higher voltage rating provides more margin.; MBRA2H100T3G: matched; RS1M: Higher voltage rating provides more margin.
Current	1.0A	2.0A	2.0A	1.0A	2.0A / 1.0A — Higher current rating provides more margin.; MBRA2H100T3G: Higher current rating provides more margin.; RS1M: matched
Trr	30ns	50ns	-	500ns	50ns / 500ns — Slightly slower recovery time, requires validation.; RS1M: Significantly slower, not suitable for high-frequency use.
Technology	Ultrafast (PN)	-	Schottky	-	Schottky — Different technology with higher leakage but lower Vf.

Application & sourcing insights

Questions & answers

The best alternative is likely MURA220T3G. It offers higher voltage (200V) and current (2A) in the same package, with a slightly slower but still very fast recovery time of 50ns. For applications sensitive to forward voltage, the Schottky diode MBRA2H100T3G is an option but requires careful review of its higher reverse leakage.