Equivalent & Substitute Parts for 0805YC821MAT2A

Part Overview

The 0805YC821MAT2A is a 820 pF ceramic capacitor manufactured by KYOCERA AVX with X7R temperature coefficient and 16V rated voltage. This surface mount multilayer ceramic capacitor (MLCC) in 0805 (2012 Metric) package is designed for general purpose applications. The part is active and in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent capacitance, package, and mounting type are maintained while allowing variations in voltage rating, temperature coefficient, and tolerance specifications within acceptable engineering parameters.

Key Parameters

Parameter	Value
Capacitance	820 pF
Tolerance	±20%
Voltage - Rated	16V
Temperature Coefficient	X7R
Operating Temperature Range	-55°C ~ 125°C
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount, MLCC
Size / Dimension	0.079" L x 0.049" W (2.01mm x 1.25mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution logic for the 0805YC821MAT2A is based on the following criteria:

Fixed Parameters (Must Match):

Capacitance: 820 pF
Package / Case: 0805 (2012 Metric)
Mounting Type: Surface Mount, MLCC
Operating Temperature Range: -55°C ~ 125°C
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Variable Parameters (Allowed to Differ):

Voltage - Rated: Substitute parts may have equal or higher voltage ratings (16V or greater)
Temperature Coefficient: Substitute parts may use X7R or C0G/NP0 dielectric types
Tolerance: Substitute parts may have tighter or equivalent tolerance specifications (±1%, ±2%, ±5%, ±10%, or ±20%)

All identified substitute parts maintain identical capacitance and package specifications while offering enhanced performance characteristics through higher voltage ratings and improved temperature stability or tolerance specifications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Tolerance	Voltage - Rated	Temperature Coefficient	Package / Case	Thickness (Max)
0805YC821MAT2A	KYOCERA AVX	820 pF	±20%	16V	X7R	0805 (2012 Metric)	0.037" (0.94mm)
08052C821KAT2A	KYOCERA AVX	820 pF	±10%	200V	X7R	0805 (2012 Metric)	0.037" (0.94mm)
KGM21BCG1H821FT	KYOCERA AVX	820 pF	±1%	50V	C0G, NP0	0805 (2012 Metric)	0.037" (0.94mm)
C0805C821F5GAC7800	KEMET	820 pF	±1%	50V	C0G, NP0	0805 (2012 Metric)	0.035" (0.88mm)
C0805C821J5GAC7800	KEMET	820 pF	±5%	50V	C0G, NP0	0805 (2012 Metric)	0.035" (0.88mm)
C0805C821J5RAC7800	KEMET	820 pF	±5%	50V	X7R	0805 (2012 Metric)	0.035" (0.88mm)
C0805C821K5GAC7800	KEMET	820 pF	±10%	50V	C0G, NP0	0805 (2012 Metric)	0.035" (0.88mm)
C0805C821K5RAC7800	KEMET	820 pF	±10%	50V	X7R	0805 (2012 Metric)	0.035" (0.88mm)
CC0805KRX7R9BB821	YAGEO	820 pF	±10%	50V	X7R	0805 (2012 Metric)	0.024" (0.60mm)
CC0805FRNPO9BN821	YAGEO	820 pF	±1%	50V	C0G, NP0	0805 (2012 Metric)	0.028" (0.70mm)
CC0805GRNPO9BN821	YAGEO	820 pF	±2%	50V	C0G, NP0	0805 (2012 Metric)	0.028" (0.70mm)

Engineering Selection Recommendations

Direct Equivalent (Same Voltage Rating): The 08052C821KAT2A from KYOCERA AVX is a direct upgrade within the same manufacturer family, offering improved tolerance (±10% versus ±20%) while maintaining X7R temperature coefficient. The 200V rating provides additional voltage margin for the same 16V application requirement.

Higher Voltage Substitutes (50V Rating): All KEMET and YAGEO parts listed operate at 50V, providing 3x voltage margin over the original 16V specification. These parts are suitable for applications where the circuit voltage remains at or below 16V. Selection between C0G/NP0 and X7R variants depends on application requirements for temperature stability and capacitance variation.

Temperature Coefficient Selection:

X7R variants (C0805C821J5RAC7800, C0805C821K5RAC7800, CC0805KRX7R9BB821) maintain the original dielectric type and are appropriate for bypass and decoupling applications with moderate temperature coefficient performance.
C0G/NP0 variants (KGM21BCG1H821FT, C0805C821F5GAC7800, C0805C821J5GAC7800, C0805C821K5GAC7800, CC0805FRNPO9BN821, CC0805GRNPO9BN821) provide superior temperature stability with near-zero temperature coefficient, suitable for precision applications.

Tolerance Considerations:

±1% tolerance parts (KGM21BCG1H821FT, C0805C821F5GAC7800, CC0805FRNPO9BN821) provide tightest capacitance control.
±2% tolerance part (CC0805GRNPO9BN821) offers intermediate precision.
±5% and ±10% tolerance parts maintain compatibility with the original ±20% specification while offering improved consistency.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical package dimensions for direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use a 50V rated capacitor in place of the 16V original part? A: Yes. A 50V rated capacitor is electrically compatible in a 16V application. The higher voltage rating provides additional safety margin and does not affect circuit operation when the actual applied voltage remains at or below 16V.

Q: What is the difference between X7R and C0G/NP0 temperature coefficients? A: X7R dielectrics exhibit ±15% capacitance variation across the -55°C to 125°C temperature range. C0G/NP0 dielectrics provide near-zero temperature coefficient (typically ±30 ppm/°C), resulting in minimal capacitance change with temperature. C0G/NP0 is preferred for precision timing and filtering circuits; X7R is suitable for general bypass and decoupling applications.

Q: Are all substitute parts pin-compatible with the original 0805YC821MAT2A? A: Yes. All listed substitute parts use the 0805 (2012 Metric) package with identical footprint dimensions (0.079" L x 1.25mm W). Physical dimensions vary slightly in thickness (0.024" to 0.037"), but all are within standard 0805 package specifications and compatible with standard PCB layouts.

Q: Can I substitute a ±1% tolerance part for the original ±20% part? A: Yes. A tighter tolerance specification (±1%) is a direct upgrade and provides improved capacitance accuracy. The original circuit design must accommodate the original ±20% tolerance; substituting with ±1% tolerance will not cause circuit malfunction and may improve performance.

Q: What is the difference between KYOCERA AVX, KEMET, and YAGEO parts? A: All three manufacturers produce equivalent 820 pF 0805 ceramic capacitors meeting the same electrical and mechanical specifications. Selection may be based on availability, supply chain preference, or specific performance features (such as low ESL characteristics noted in KEMET parts). All listed parts are ROHS3 compliant with MSL 1 rating.

Q: Is the 08052C821KAT2A recommended as the primary substitute? A: The 08052C821KAT2A is designated as a manufacturer-recommended upgrade from KYOCERA AVX, the original part manufacturer. It maintains the same X7R dielectric and 0805 package while offering improved ±10% tolerance and significantly higher 200V voltage rating. This part is appropriate when maintaining the original manufacturer's product line is preferred.

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