Is there a pin-compatible replacement for GJM1555C1H1R4BB01D?

Yes, several parts like GRM1555C1H1R5BA01D share the same 0402 package and pinout. While physically compatible, the electrical difference between the High-Q (GJM) and general-purpose (GRM) series means it is not a direct drop-in replacement and requires review.

What risks should I check before replacing GJM1555C1H1R4BB01D?

The main risk is performance degradation. The target is a High-Q (GJM) capacitor, critical for RF/timing circuits. Most alternatives are general-purpose (GRM), which have lower Q-factor. Always verify if this functional downgrade is acceptable for your design.

GJM1555C1H1R4BB01D Alternatives, Datasheet & Cross Reference | Murata Manufacturing Co., Ltd.

Finding a replacement for the Murata GJM1555C1H1R4BB01D 1.4pF High-Q capacitor requires careful attention to both capacitance value and series type. Alternatives exist, but may involve a functional downgrade from High-Q (GJM) to general purpose (GRM) series, which must be validated by an engineer.

AI replacement insight

Electrical riskhigh

Q-factor mismatch from GJM to GRM series can affect circuit performance, especially in RF/timing applications.

Package risklow

All viable candidates share the same 0402 package, ensuring physical compatibility.

Sourcing riskhigh

The closest parametric matches are Not Recommended for New Designs (NRND), posing long-term supply chain challenges.

Can it be replaced directly?

No direct drop-in replacement has been identified. The best candidates require engineering review due to a functional downgrade from a High-Q (GJM) to a general-purpose (GRM) capacitor series.

Best replacement path

The closest option is GRM1555C1H1R5BA01D, which has a very similar capacitance (1.5pF) and identical tolerance, but is a general-purpose (GRM) part.

Main risk

The primary risk is substituting a general-purpose (GRM) capacitor for a High-Q (GJM) one, which can degrade performance in RF and high-frequency circuits.

Recommended alternatives

A 1.5pF capacitor with same package and voltage, but is a general purpose type (GRM) which may not replace the High-Q (GJM) target.

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Alternative comparison matrix

Feature / factor	GJM1555C1H1R4BB01D	GRM1555C1H1R5BA01D	GRM1555C1H1R5CA01D	Compatibility / risk
Package	0402 (1005 metric)	0402 (1005 metric)	0402 (1005 metric)	0402 (1005 metric) — Form factor matches.; GRM1555C1H1R5CA01D: Form factor matches.
Voltage	50.0V	50.0V	50.0V	50.0V — Voltage rating matches.; GRM1555C1H1R5CA01D: Voltage rating matches.
Capacitance	1.4pF	1.5pF	1.5pF	1.5pF — Slightly higher capacitance, within ~7%.; GRM1555C1H1R5CA01D: Slightly higher capacitance, within ~7%.
Tolerance	±0.1pF	±0.1pF	±0.25pF	±0.1pF / ±0.25pF — Tolerance matches.; GRM1555C1H1R5CA01D: Tolerance is looser.
Series	GJM (High-Q)	GRM (General)	GRM (General)	GRM (General) — Functional downgrade from High-Q (GJM).; GRM1555C1H1R5CA01D: Functional downgrade from High-Q (GJM).
Lifecycle	Active	NRND	-	NRND — Candidate is not recommended for new designs.

Application & sourcing insights

Questions & answers

GRM1555C1H1R5BA01D is a potential alternative with a close 1.5pF capacitance and identical tolerance. However, it is a general-purpose (GRM) series, not High-Q (GJM), which requires engineering validation for your application.