08051U121FAT4A Equivalent & Substitute Parts

Part Overview

The 08051U121FAT4A is a 120 pF ceramic capacitor manufactured by KYOCERA AVX, rated for 100V with C0G/NP0 temperature coefficient characteristics. This Surface Mount MLCC (Multilayer Ceramic Capacitor) in 0805 (2012 Metric) package is designed for RF, microwave, and high-frequency applications requiring ultra-low ESR performance. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when inventory constraints, lead time requirements, or supply chain considerations necessitate alternative sourcing while maintaining identical electrical and mechanical specifications.

Substiute Parts

08051U121FAT4A

KYOCERA AVXIn Stock: 107608051U121FAT4A Datasheet

Current PartRFQ

08051U121FAT2A

KYOCERA AVXIn Stock: 504808051U121FAT2A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 08051U121FAT2A qualifies as a parametric equivalent to the 08051U121FAT4A based on strict alignment of the following critical parameters:

• Capacitance value: 120 pF (identical)
• Tolerance: ±1% (identical)
• Voltage rating: 100V (identical)
• Temperature coefficient: C0G, NP0 (identical)
• Operating temperature range: -55°C to 125°C (identical)
• Package designation: 0805 (2012 Metric) (identical)
• Mounting type: Surface Mount, MLCC (identical)
• Physical dimensions: 0.079" L × 0.049" W, 0.045" max thickness (identical)
• Manufacturer: KYOCERA AVX (same manufacturer)
• Product status: Active (both parts in active production)
• Compliance certifications: ROHS3, REACH Unaffected (identical)

The substitution is based on identical electrical performance, mechanical compatibility, and regulatory compliance. The difference in part number suffix (4A vs. 2A) reflects packaging configuration variation (Tape & Reel specification) rather than functional or performance differentiation.

Parameter Comparison

Engineering Selection Recommendations

Both the 08051U121FAT4A and 08051U121FAT2A are suitable for direct substitution in RF, microwave, and high-frequency circuit applications. Selection between these parts should be based on:

• Inventory availability and lead time requirements
• Supply chain logistics and packaging preferences
• Cost considerations for the specific procurement volume
• Existing component qualification documentation within your organization

Both parts maintain identical electrical performance, mechanical fit, and regulatory compliance status (ROHS3 Compliant, REACH Unaffected). No circuit re-qualification is required when substituting between these parts, as all critical parameters remain constant.

Frequently Asked Questions (FAQ)

Q: Can 08051U121FAT2A be used as a direct replacement for 08051U121FAT4A in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The part number suffix variation reflects packaging configuration only. No design changes or re-qualification are necessary.

Q: Are there any performance differences between these two part numbers?

A: No. Capacitance, tolerance, voltage rating, temperature coefficient, operating temperature range, package dimensions, and ESR characteristics are identical across both parts.

Q: What does the difference in part number suffix (4A vs. 2A) indicate?

A: The suffix variation indicates different Tape & Reel packaging specifications. Both parts are Surface Mount MLCCs in 0805 (2012 Metric) package with identical electrical and mechanical properties.

Q: Are both parts compliant with current regulatory requirements?

A: Yes. Both 08051U121FAT4A and 08051U121FAT2A are ROHS3 Compliant and REACH Unaffected, with MSL 1 (Unlimited) moisture sensitivity rating.

Q: Which part should be selected for new designs?

A: Either part is suitable for new designs. Selection should be based on current inventory availability, lead time, and supply chain considerations. Both parts are in active production status.