Is there a pin-compatible replacement for FAUL0420-2R2MT?

While no replacement is confirmed as pin-to-pin without board-level testing, FEXL0430A-2R2M has a very similar 4.1mm x 4.1mm package and may fit the same land pattern. Its lack of AEC-Q200 qualification must be considered.

What risks should I check before replacing FAUL0420-2R2MT?

Key risks include package size mismatch requiring PCB layout changes, lower maximum operating temperature, and lack of AEC-Q200 qualification, which is critical for automotive applications. Always verify DCR to ensure thermal performance is not compromised.

FAUL0420-2R2MT Alternatives, Datasheet & Cross Reference | Shenzhen CJiang Technology Co., Ltd.

Finding a replacement for the FAUL0420-2R2MT power inductor requires matching its 2.2µH inductance, AEC-Q200 qualification, and compact 4.2mm x 4.4mm package. Key parameters to verify are the 5A saturation current, 4.5A RMS current, and 58mΩ DCR.

AI replacement insight

Package riskmedium

Some alternatives are physically larger, requiring a PCB respin.

Electrical risklow

Several alternatives offer superior current and DCR ratings.

Qualification riskhigh

Target is AEC-Q200; many alternatives are not, posing a reliability risk in automotive applications.

Can it be replaced directly?

There is no confirmed direct drop-in replacement. FEXL0430A-2R2M is the closest in form factor but lacks the target's automotive qualification and high-temperature rating.

Best replacement path

For a similar footprint, consider FEXL0430A-2R2M but verify application requirements as it is not AEC-Q200 qualified. For an AEC-Q200 qualified upgrade, use FAUL0518-2R2MT and adjust the PCB layout.

Main risk

The primary risk is substituting a non-AEC-Q200 qualified part into an automotive design, which could lead to reliability issues.

Recommended alternatives

An automotive-grade upgrade with higher current ratings, but its larger package requires a board redesign.

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Alternative comparison matrix

Feature / factor	FAUL0420-2R2MT	FAUL0518-2R2MT	FEXL0430A-2R2M	Compatibility / risk
Package	4.2mm x 4.4mm	5.4mm x 5.2mm	4.1mm x 4.1mm	5.4mm x 5.2mm / 4.1mm x 4.1mm — Larger footprint requires PCB layout change.; FEXL0430A-2R2M: Very similar footprint, may fit same land pattern. Height may differ.
Saturation Current A	5.0A	6.0A	7.0A	6.0A / 7.0A — Higher saturation current.; FEXL0430A-2R2M: Higher saturation current provides more margin.
Current A	4.5A	5.0A	7.8A	5.0A / 7.8A — Higher RMS current rating.; FEXL0430A-2R2M: Higher RMS current rating allows for cooler operation.
Dcr Ohm	58mΩ	35mΩ	22.6mΩ	35mΩ / 22.6mΩ — Lower DCR improves efficiency.; FEXL0430A-2R2M: Significantly lower DCR improves efficiency.
Application	AEC-Q200	AEC-Q200	None	AEC-Q200 / None — Both parts are AEC-Q200 qualified.; FEXL0430A-2R2M: Candidate is not AEC-Q200 qualified.
Temperature	-55°C to +155°C	-55°C to +155°C	-	-55°C to +155°C — Identical operating temperature range.

Application & sourcing insights

Questions & answers

For non-automotive applications, FEXL0430A-2R2M offers better electrical performance in a nearly identical package. For automotive-grade designs, FAUL0518-2R2MT is an upgrade but requires a larger board footprint.