08055A821FAT9A Equivalent & Substitute Parts

Part Overview

The 08055A821FAT9A is a 820 pF ceramic capacitor manufactured by KYOCERA AVX, rated at 50V with C0G/NP0 temperature coefficient in 0805 (2012 Metric) surface mount package. This component is designed for general-purpose applications requiring stable capacitance across temperature ranges from -55°C to 125°C. The part maintains Active product status with full ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified to support procurement flexibility, inventory optimization, and supply chain continuity.

Substiute Parts

08055A821FAT9A

KYOCERA AVXIn Stock: 91508055A821FAT9A Datasheet

Current PartRFQ

KGM21BCG2A821FT

KYOCERA AVXIn Stock: 5165KGM21BCG2A821FT Datasheet

UpgradeRFQ

C0805C821F5GAC7800

KEMETIn Stock: 6436C0805C821F5GAC7800 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 08055A821FAT9A are classified based on electrical and mechanical compatibility within the following allowed parameters:

Primary Substitution Criteria:

• Capacitance: 820 pF (exact match required)
• Tolerance: ±1% (exact match required)
• Temperature Coefficient: C0G/NP0 (exact match required)
• Package: 0805 (2012 Metric) (exact match required)
• Mounting Type: Surface Mount, MLCC (exact match required)
• Operating Temperature: -55°C to 125°C (exact match or better required)
• RoHS Compliance: ROHS3 Compliant (exact match required)
• MSL Rating: 1 (Unlimited) (exact match or better required)

Secondary Compatibility Parameter:

• Voltage Rating: 50V minimum (equal or higher voltage rating is acceptable)

Two substitute parts meet these criteria with variations in voltage rating and manufacturer:

1. KGM21BCG2A821FT (KYOCERA AVX): Upgrade substitute with 100V voltage rating
2. C0805C821F5GAC7800 (KEMET): Direct equivalent with matching 50V voltage rating

Parameter Comparison

Engineering Selection Recommendations

KGM21BCG2A821FT (KYOCERA AVX - Upgrade Substitute): This part provides identical electrical and mechanical specifications to the main part with an elevated voltage rating of 100V. The upgrade substitution is valid for applications where the original 50V rating is sufficient, as higher voltage-rated capacitors maintain the same capacitance and tolerance characteristics. Both parts share KYOCERA AVX manufacturing, identical package dimensions, and full ROHS3 compliance. This substitute is suitable for designs requiring supply chain flexibility within the same manufacturer ecosystem.

C0805C821F5GAC7800 (KEMET - Direct Equivalent): This part matches the main part specification exactly in capacitance, tolerance, voltage rating, and temperature coefficient. Dimensional variations are minimal (thickness 0.035" vs. 0.037"), remaining within standard PCB assembly tolerances. Both parts maintain ROHS3 compliance and unlimited MSL rating. The KEMET part includes Low ESL characteristics and is available in higher inventory quantity. This substitute is suitable for direct replacement in applications where cross-manufacturer sourcing is acceptable.

Frequently Asked Questions (FAQ)

Q: Can KGM21BCG2A821FT replace 08055A821FAT9A in any application? A: Yes. The KGM21BCG2A821FT is a valid substitute with identical capacitance, tolerance, temperature coefficient, and package specifications. The 100V voltage rating is higher than the original 50V rating, which does not create compatibility issues for applications designed for 50V operation.

Q: What is the difference between the KEMET C0805C821F5GAC7800 and the original part? A: The KEMET part is electrically identical with matching 50V voltage rating, capacitance, tolerance, and temperature coefficient. Physical dimensions are nearly identical, with a maximum thickness difference of 0.002" (0.06mm), which is within standard PCB assembly tolerances. The KEMET part includes Low ESL characteristics.

Q: Are all three parts interchangeable on the same PCB? A: Yes. All three parts share identical electrical specifications (820 pF, ±1%, C0G/NP0), the same 0805 package footprint, and compatible physical dimensions. Surface mount assembly equipment can process all three parts without modification.

Q: Does the higher voltage rating of KGM21BCG2A821FT affect circuit performance? A: No. Higher voltage-rated capacitors of the same capacitance and tolerance maintain identical electrical performance in circuits designed for lower voltage operation. The 100V rating provides additional design margin without changing capacitance behavior.

Q: Are there any compliance or certification differences between these parts? A: All three parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) rating. All parts maintain Active product status with identical environmental and regulatory compliance profiles.

Q: Can these parts be used interchangeably in high-frequency applications? A: Electrical substitution is valid based on provided specifications. The KEMET part includes Low ESL characteristics. For high-frequency performance validation, refer to manufacturer datasheets for detailed frequency response and impedance characteristics.