08055C821MAT2A Equivalent & Substitute Parts

Part Overview

The 08055C821MAT2A is a 820 pF ±20% 50V ceramic capacitor manufactured by KYOCERA AVX in 0805 (2012 Metric) surface mount package. This X7R temperature coefficient capacitor is designed for general purpose applications and is currently in active production status with 1180 units in stock. Substitute parts are identified when design requirements necessitate different voltage ratings, improved tolerance specifications, or alternative temperature coefficient characteristics while maintaining the same capacitance value and package footprint.

Key Parameters

Parameter	Value
Capacitance	820 pF
Tolerance	±20%
Voltage Rating	50V
Temperature Coefficient	X7R
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)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Mandatory Compatibility Parameters:

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

Variable Parameters Allowing Substitution:

Voltage Rating: May be equal to or higher than 50V
Tolerance: May be tighter (lower) than ±20%
Temperature Coefficient: May differ (X7R or C0G/NP0)
Manufacturer: KYOCERA AVX or KEMET

All substitute parts listed maintain identical physical dimensions (0.079" L x 0.049" W / 2.01mm x 1.25mm) and thickness specifications (0.037" / 0.94mm maximum).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Tolerance	Voltage Rating	Temperature Coefficient	Packaging	Inventory Status
08055C821MAT2A	KYOCERA AVX	820 pF	±20%	50V	X7R	Tape & Reel (TR)	1180 Pcs
08052C821KAT2A	KYOCERA AVX	820 pF	±10%	200V	X7R	Tape & Reel (TR)	10876 Pcs
KGM21BCG1H821FT	KYOCERA AVX	820 pF	±1%	50V	C0G, NP0	Tape & Reel (TR)	5413 Pcs
KGM21BCG2A821FT	KYOCERA AVX	820 pF	±1%	100V	C0G, NP0	Tape & Reel (TR)	5124 Pcs
KGM21BCG2A821JT	KYOCERA AVX	820 pF	±5%	100V	C0G, NP0	Tape & Reel (TR)	25041 Pcs
C0805C821F5GAC7800	KEMET	820 pF	±1%	50V	C0G, NP0	Tape & Reel (TR)	6337 Pcs
C0805C821G5GAC7800	KEMET	820 pF	±2%	50V	C0G, NP0	Cut Tape (CT)	1175 Pcs
C0805C821J1GAC7800	KEMET	820 pF	±5%	100V	C0G, NP0	Tape & Reel (TR)	12615 Pcs
C0805C821J5GAC7800	KEMET	820 pF	±5%	50V	C0G, NP0	Tape & Reel (TR)	93282 Pcs
C0805C821J5RAC7800	KEMET	820 pF	±5%	50V	X7R	Tape & Reel (TR)	8212 Pcs
C0805C821JAGAC7800	KEMET	820 pF	±5%	250V	C0G, NP0	Tape & Reel (TR)	4299 Pcs

Engineering Selection Recommendations

Direct Voltage-Rated Substitutes (Same X7R Coefficient):

08052C821KAT2A: Provides 200V rating with improved ±10% tolerance while maintaining X7R characteristics. Suitable for applications requiring higher voltage margin.
C0805C821J5RAC7800: KEMET equivalent with identical 50V X7R specification and ±5% tolerance. Maintains same temperature coefficient performance.

Improved Tolerance Substitutes (C0G/NP0 Coefficient):

KGM21BCG1H821FT: KYOCERA AVX C0G/NP0 variant with ±1% tolerance at 50V. Provides superior frequency stability and temperature stability compared to X7R.
C0805C821F5GAC7800: KEMET C0G/NP0 equivalent with ±1% tolerance at 50V. Includes Low ESL feature.
C0805C821G5GAC7800: KEMET C0G/NP0 with ±2% tolerance at 50V in Cut Tape packaging.

Higher Voltage Substitutes (C0G/NP0 Coefficient):

KGM21BCG2A821FT: KYOCERA AVX C0G/NP0 at 100V with ±1% tolerance.
KGM21BCG2A821JT: KYOCERA AVX C0G/NP0 at 100V with ±5% tolerance. Highest inventory availability (25041 Pcs).
C0805C821J1GAC7800: KEMET C0G/NP0 at 100V with ±5% tolerance and Low ESL feature.
C0805C821JAGAC7800: KEMET C0G/NP0 at 250V with ±5% tolerance for maximum voltage margin applications.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical package dimensions. Selection depends on specific circuit requirements for voltage margin, tolerance precision, and temperature coefficient stability.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 08055C821MAT2A with a higher voltage rated part? A: Yes. Any substitute part with equal or higher voltage rating (50V or greater) is electrically compatible. Higher voltage ratings provide additional safety margin without affecting circuit performance at the original 50V operating point.

Q: What is the difference between X7R and C0G/NP0 temperature coefficients? A: X7R capacitors exhibit ±15% capacitance change across the -55°C to 125°C temperature range. C0G/NP0 capacitors maintain superior stability with minimal capacitance variation across temperature. C0G/NP0 is preferred for precision timing and filtering circuits where temperature stability is critical.

Q: Are KEMET and KYOCERA AVX parts interchangeable? A: Yes, when all electrical parameters (capacitance, voltage, tolerance, temperature coefficient) and physical specifications (0805 package, dimensions, thickness) are identical. Both manufacturers produce ROHS3 compliant components with MSL 1 ratings suitable for the same applications.

Q: Does tolerance affect circuit performance? A: Tolerance determines the acceptable capacitance range. The 08055C821MAT2A with ±20% tolerance allows 656 pF to 984 pF. Tighter tolerance substitutes (±1%, ±2%, ±5%) provide more precise capacitance values, beneficial for circuits requiring specific frequency response or filtering characteristics.

Q: What packaging options are available? A: Most substitutes are supplied in Tape & Reel (TR) format for automated assembly. C0805C821G5GAC7800 is available in Cut Tape (CT) format for lower volume requirements. Both formats use identical 0805 (2012 Metric) component dimensions.

Q: Can I use a substitute with lower tolerance in place of the original part? A: Yes. Lower tolerance parts (±1%, ±2%, ±5%) are direct substitutes for the ±20% original specification. They provide tighter capacitance control without any compatibility issues.

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