KYOCERA AVX 08055U121FAT2A Equivalent & Substitute Parts

Part Overview

The KYOCERA AVX 08055U121FAT2A is a 120 pF ±1% ceramic capacitor rated for 50V operation with C0G/NP0 temperature coefficient characteristics. This surface mount multilayer ceramic capacitor (MLCC) is designed for RF, microwave, and high-frequency applications requiring ultra-low ESR performance. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same package footprint and mounting technology.

Substiute Parts

08055U121FAT2A

KYOCERA AVXIn Stock: 80408055U121FAT2A Datasheet

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08051U121FAT2A

KYOCERA AVXIn Stock: 504808051U121FAT2A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 08055U121FAT2A is determined by strict adherence to the following electrical and mechanical parameters:

• Capacitance value: 120 pF (exact match required)
• Tolerance: ±1% (exact match required)
• Temperature coefficient: C0G/NP0 (exact match required)
• Package footprint: 0805 (2012 Metric) (exact match required)
• Mounting technology: Surface Mount, MLCC (exact match required)
• Operating temperature range: -55°C to 125°C (exact match required)

The voltage rating may be upgraded to a higher value while maintaining all other parameters. An upgrade from 50V to 100V rating is permissible as it provides enhanced voltage margin without affecting capacitance, tolerance, temperature stability, or physical dimensions.

Parameter Comparison

Engineering Selection Recommendations

The 08051U121FAT2A serves as a direct substitute for the 08055U121FAT2A with the primary distinction being an elevated voltage rating of 100V versus 50V. Both parts maintain identical capacitance, tolerance, temperature coefficient, and physical dimensions. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating, ensuring equivalent supply chain reliability and regulatory compliance. The 100V-rated substitute provides additional voltage margin for applications where circuit design permits higher voltage operation without compromising performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 08051U121FAT2A (100V) be used in place of the 08055U121FAT2A (50V)?

A: Yes. The 100V-rated part is electrically and mechanically compatible. All critical parameters—capacitance, tolerance, temperature coefficient, package footprint, and operating temperature range—are identical. The higher voltage rating provides additional design margin.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts use the 0805 (2012 Metric) package with identical length (0.079"), width (0.049"), and maximum thickness (0.045"). They are mechanically interchangeable on PCB layouts.

Q: Do both parts have the same moisture sensitivity level?

A: Yes. Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

Q: Are both parts RoHS compliant?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the key difference between these two parts?

A: The sole difference is the voltage rating: 08055U121FAT2A is rated for 50V operation, while 08051U121FAT2A is rated for 100V operation. All other electrical and mechanical specifications are identical.