Is there a pin-compatible replacement for GJM1555C1HR20BB01D?

No, a pin-compatible replacement with the same critical 0.2pF capacitance was not identified. Other 0402 capacitors like CQ0402BRNPO9BNR30 have a different capacitance (0.3pF) and must be validated in your application.

What risks should I check before replacing GJM1555C1HR20BB01D?

The main risks are electrical and mechanical. An electrical risk from using a part with different capacitance (e.g., 0.3pF vs 0.2pF) can detune RF or timing circuits. A mechanical risk involves using a part with a different package (e.g., 0201 vs 0402), which requires a new PCB layout.

GJM1555C1HR20BB01D Alternatives, Datasheet & Cross Reference | Murata Manufacturing Co., Ltd.

GJM1555C1HR20BB01D is a precision 0.2pF 50V high-Q capacitor in an 0402 package. While no direct drop-in replacement exists, alternatives are available that require either a PCB layout change or careful validation of a different capacitance value.

AI replacement insight

Electrical riskhigh

Capacitance is critical for high-Q parts; deviation can cause circuit failure.

Package riskmedium

An electrically identical part exists in a smaller package, requiring a board redesign.

Sourcing risklow

Multiple parametric or functional alternatives are available from major manufacturers.

Can it be replaced directly?

No, there are no direct, one-to-one replacements for GJM1555C1HR20BB01D with the same package and identical 0.2pF capacitance.

Best replacement path

The best path is using GRM0335C1HR20BA01D, which is electrically identical but requires a PCB layout change for its smaller 0201 package.

Main risk

The primary risk is capacitance mismatch, which can detune RF circuits. A secondary risk is package mismatch, requiring PCB redesign.

Recommended alternatives

Electrically identical functional alternative in a smaller 0201 package.

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Alternative comparison matrix

Feature / factor	GJM1555C1HR20BB01D	GRM0335C1HR20BA01D	CQ0402BRNPO9BNR30	Compatibility / risk
Capacitance	0.2 pF	0.2 pF	0.3 pF	0.2 pF / 0.3 pF — Identical capacitance value.; CQ0402BRNPO9BNR30: 50% higher capacitance, may detune circuit.
Package	0402 (1005 metric)	0201 (0603 metric)	0402 (1005 metric)	0201 (0603 metric) / 0402 (1005 metric) — Candidate is smaller, requires PCB redesign.; CQ0402BRNPO9BNR30: Package size and footprint match.
Voltage	50.0 V	50.0 V	50.0 V	50.0 V — Voltage rating matches.; CQ0402BRNPO9BNR30: Voltage rating matches.
Dielectric	C0G	C0G (NP0)	-	C0G (NP0) — Dielectric material matches.
Lifecycle	Active	Active	-	Active — Both parts are in active production.
Manufacturer	Murata Electronics	-	Yageo	Yageo — Cross-vendor alternative.

Application & sourcing insights

Questions & answers

The best alternative depends on your design constraints. GRM0335C1HR20BA01D is electrically identical but requires changing your PCB layout to a smaller 0201 package. If you must use the 0402 package, no exact match was found, and any substitute requires careful circuit validation.