Is there a pin-compatible replacement for MF-USMF005-2?

Yes, parts like SMD1210P005TF have the same 1210 package and pinout. While form-fit compatible, key differences like missing AEC-Q200 qualification mean they are not guaranteed drop-in replacements without review.

What risks should I check before replacing MF-USMF005-2?

Key risks include mismatched hold/trip currents, which affect protection levels, and missing AEC-Q200 qualification, which is critical for automotive applications. Also verify resistance characteristics and time-to-trip curves.

MF-USMF005-2 Alternatives, Datasheet & Cross Reference | BOURNS

MF-USMF005-2 is a 30V, 50mA AEC-Q200 qualified PTC resettable fuse in a 1210 package. Alternatives exist with matching electricals but may lack automotive qualification, requiring careful review.

AI replacement insight

Electrical riskhigh

Using a part with higher hold/trip current will not protect the circuit as designed.

Application riskmedium

Substituting a non-AEC-Q200 part into an automotive design is a major compliance and reliability risk.

Package risklow

Multiple candidates match the 1210 package, so physical fit is not a primary concern.

Can it be replaced directly?

No direct, fully-qualified drop-in replacement was found. Alternatives require careful review of current ratings and automotive qualification.

Best replacement path

For non-automotive use, SMD1210P005TF is a strong choice. For automotive, another AEC-Q200 50mA/30V PTC in a 1210 package must be sourced.

Main risk

The primary risk is using a non-AEC-Q200 part in an automotive application, or using a part with a higher current rating, which compromises circuit protection.

Recommended alternatives

Strong parametric match for non-automotive uses; same package, voltage, and current ratings.

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Alternative comparison matrix

Feature / factor	MF-USMF005-2	SMD1210B005TF	SMD1210P005TF	MF-USMF010-2	Compatibility / risk
Package	1210 (3225 metric)	1210 (3225 metric)	1210	1210 (3225 metric)	1210 (3225 metric) — Package size matches.; SMD1210P005TF: Package size matches.; MF-USMF010-2: Package size matches.
Voltage	30V	30V	30V	30V	30V — Maximum voltage rating matches.; SMD1210P005TF: Maximum voltage rating matches.; MF-USMF010-2: Maximum voltage rating matches.
Current	0.05A	0.05A	0.05A	0.1A	0.05A / 0.1A — Hold current matches.; SMD1210P005TF: Hold current matches.; MF-USMF010-2: Hold current is 2x higher, offering less protection.
Trip Current	0.15A	0.15A	0.15A	-	0.15A — Trip current matches.; SMD1210P005TF: Trip current matches.
Qualification	AEC-Q200	None	None	AEC-Q200	None / AEC-Q200 — Candidate lacks AEC-Q200 qualification.; SMD1210P005TF: Candidate lacks AEC-Q200 qualification.; MF-USMF010-2: Automotive qualification matches.

Application & sourcing insights

Questions & answers

SMD1210P005TF and SMD1210B005TF are strong functional alternatives with the same hold/trip current, voltage, and package. However, they lack AEC-Q200 qualification and require validation for automotive use.