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Cross-Referencing MLCCs: Murata, Samsung, Yageo, and KEMET Compared

Supply chain volatility has made MLCC cross-referencing an essential engineering skill.

Supply chain volatility has made MLCC cross-referencing an essential engineering skill. This guide provides a systematic methodology for evaluating Murata, Samsung, Yageo, and KEMEcapacitors beyond basic specifications, focusing on the electrical characteristics that determine real-world performance equivalence.

Recommended article: Yageo CC0603KRX7R9BB104 MLCC: Complete Technical Guide for Engineers

Critical Performance Parameters

Parameter Impact Measurement Standard
DC Bias Characteristic Effective capacitance under operating voltage JEDEC JESD-21-C
Temperature Coefficient Capacitance stability across temperature EIA RS-198
ESR/ESL High-frequency performance Impedance analyzer

DC bias characteristics show the most significant variation between manufacturers. For example, a 10μF X5R capacitor from different vendors may retain anywhere from 30% to 70% of its nominal capacitance at 5V bias.

Part Number Decoding Across Manufacturers

Manufacturer Example Part Key Elements
Murata GRM188R71H104KA01D R7=X7R, 1H=50V, 104=100nF
Yageo CC0603KRX7R9BB104 0603 case, X7R, 100nF, 50V

Manufacturer Performance Comparison

DC Bias Performance Trends

  • Murata: Typically shows 20-30% better capacitance retention than minimum specs
  • KEMET: "X7S" dielectrics offer improved bias performance
  • Samsung: CL series shows reduced bias effects vs standard X5R/X7R
  • Yageo: Standard X7R shows typical 50-60% retention at rated voltage

Practical Cross-Referencing Methodology

  1. Define Critical Parameters: Identify non-negotiable specs including DC bias requirements, temperature range, and ESR limits
  2. Generate Candidate List: Use manufacturer tools for initial screening
  3. Datasheet Analysis: Compare DC bias, ESR, and TC curves side-by-side
  4. Prototype Validation: Test under worst-case operating conditions

FAQ

How does case size affect DC bias performance?

Smaller case sizes (0402 and below) typically show 5-10% worse capacitance retention due to thinner dielectric layers.

Test at least 30 pieces from three different date codes to account for manufacturing variations.

At +125°C, an X7R capacitor may lose an additional 10-15% capacitance compared to room temperature measurements.

Only if they meet all AEC-Q200 requirements and show comparable electrical characteristics in datasheet curves.

X5R typically ages 2x faster than X7R (≈2% vs ≈1% per decade hour at 25°C).

For immediate samples or bulk orders, you can contact the supplier via the contact email below.

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