820 pF 100V X7R 0805 Ceramic Capacitor 08051C821MAT2A

Part Overview

The 08051C821MAT2A is a 820 pF ceramic capacitor manufactured by KYOCERA AVX, rated for 100V with X7R temperature coefficient in 0805 (2012 Metric) surface mount package. This part is currently active in production with 662 units in stock. The X7R dielectric provides stable capacitance across the operating temperature range of -55°C to 125°C with ±20% tolerance. Equivalent and substitute parts are identified based on matching capacitance value, package size, mounting type, and operating temperature range while allowing variations in voltage rating, tolerance, and temperature coefficient that maintain functional compatibility for general purpose applications.

Key Parameters

Parameter	Value
Capacitance	820 pF
Tolerance	±20%
Voltage Rating	100V
Temperature Coefficient	X7R
Operating Temperature Range	-55°C to 125°C
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount, MLCC
Size	0.079" L x 0.049" W (2.00mm x 1.25mm)
Thickness	0.037" (0.94mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 08051C821MAT2A are grouped based on the following substitution criteria:

Primary Matching Parameters:

Capacitance: 820 pF (exact match required)
Package: 0805 (2012 Metric) (exact match required)
Mounting Type: Surface Mount, MLCC (exact match required)
Operating Temperature Range: -55°C to 125°C (exact match required)

Allowable Variations:

Voltage Rating: May be equal to or higher than 100V
Tolerance: May be tighter (lower) than ±20%
Temperature Coefficient: May differ (X7R, C0G/NP0 acceptable)
Manufacturer: Different manufacturers permitted
Thickness: Minor variations acceptable within package constraints

Substitutes are divided into three categories: Upgrade parts with higher voltage ratings or improved tolerance, alternative C0G/NP0 dielectric options, and manufacturer-recommended alternatives from TDK Corporation.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Tolerance	Voltage Rating	Temperature Coefficient	Package	Size (L x W)	Thickness	Product Status	Inventory
08051C821MAT2A	KYOCERA AVX	820 pF	±20%	100V	X7R	0805	2.00mm x 1.25mm	0.94mm	Active	662 Pcs
08052C821KAT2A	KYOCERA AVX	820 pF	±10%	200V	X7R	0805	2.01mm x 1.25mm	0.94mm	Active	10876 Pcs
KGM21BCG2A821FT	KYOCERA AVX	820 pF	±1%	100V	C0G, NP0	0805	2.01mm x 1.25mm	0.94mm	Active	5124 Pcs
KGM21BCG2A821JT	KYOCERA AVX	820 pF	±5%	100V	C0G, NP0	0805	2.01mm x 1.25mm	0.94mm	Active	25041 Pcs
C0805C821J1GAC7800	KEMET	820 pF	±5%	100V	C0G, NP0	0805	2.00mm x 1.25mm	0.88mm	Active	12615 Pcs
C0805C821JAGAC7800	KEMET	820 pF	±5%	250V	C0G, NP0	0805	2.00mm x 1.25mm	0.88mm	Active	4299 Pcs
C0805C821JCGAC7800	KEMET	820 pF	±5%	500V	C0G, NP0	0805	2.00mm x 1.25mm	0.88mm	Active	3242 Pcs
C2012C0G2E821J060AA	TDK Corporation	820 pF	±5%	250V	C0G, NP0	0805	2.00mm x 1.25mm	0.75mm	Last Time Buy	4813 Pcs
C2012C0G2E821K060AA	TDK Corporation	820 pF	±10%	250V	C0G, NP0	0805	2.00mm x 1.25mm	0.75mm	Last Time Buy	2510 Pcs
C2012C0G2W821J060AA	TDK Corporation	820 pF	±5%	450V	C0G, NP0	0805	2.00mm x 1.25mm	0.75mm	Last Time Buy	4660 Pcs
C2012C0G2W821K060AA	TDK Corporation	820 pF	±10%	450V	C0G, NP0	0805	2.00mm x 1.25mm	0.75mm	Last Time Buy	1277 Pcs

Engineering Selection Recommendations

KYOCERA AVX 08052C821KAT2A provides a direct upgrade path with improved tolerance (±10% versus ±20%) and doubled voltage rating (200V versus 100V) while maintaining X7R temperature coefficient and identical package dimensions. This part is currently in active production with high inventory availability (10876 units).

KYOCERA AVX KGM21BCG2A821JT offers superior tolerance (±5%) and C0G/NP0 temperature coefficient with tighter capacitance stability across temperature extremes. This part is actively produced with the highest inventory level (25041 units) among all substitutes.

KEMET C0805C821J1GAC7800 provides C0G/NP0 dielectric with ±5% tolerance at 100V rating, matching the original voltage specification. Low ESL feature is documented. This part is in active production with substantial inventory (12615 units).

KEMET C0805C821JAGAC7800 and C0805C821JCGAC7800 offer higher voltage ratings (250V and 500V respectively) with C0G/NP0 dielectric and ±5% tolerance. Both are actively produced.

TDK Corporation C2012C0G2E821J060AA, C2012C0G2E821K060AA, C2012C0G2W821J060AA, and C2012C0G2W821K060AA are manufacturer-recommended alternatives with C0G/NP0 dielectric and voltage ratings from 250V to 450V. These parts carry Last Time Buy status, indicating discontinued production lines.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical operating temperature range (-55°C to 125°C). Selection should prioritize active production status and application voltage requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 08051C821MAT2A with a higher voltage rated part?

A: Yes. All substitute parts rated at 200V, 250V, 450V, or 500V are electrically compatible for applications requiring 100V or less. Higher voltage ratings provide additional safety margin and do not degrade circuit performance in lower voltage applications.

Q: What is the difference between X7R and C0G/NP0 temperature coefficients?

A: X7R provides ±15% capacitance variation across -55°C to 125°C temperature range. C0G/NP0 provides superior stability with ±0.3% variation across the same range. C0G/NP0 substitutes are suitable for applications requiring tighter capacitance tolerance over temperature.

Q: Are the dimensional differences between substitute parts significant?

A: Thickness variations exist: the original part measures 0.94mm, while KEMET parts measure 0.88mm and TDK parts measure 0.75mm. All parts fit within 0805 (2012 Metric) package constraints. Verify PCB assembly equipment compatibility with thinner parts if thickness-critical applications exist.

Q: Why are some TDK parts marked Last Time Buy?

A: Last Time Buy status indicates these production lines are discontinued. Inventory remains available but will not be replenished. Select active production alternatives for long-term supply chain stability.

Q: Can I use a ±1% tolerance part where ±20% tolerance is specified?

A: Yes. Tighter tolerance (±1%) is a functional upgrade. The circuit designed for ±20% tolerance will operate correctly with ±1% tolerance parts. Verify that tighter tolerance does not introduce unintended circuit behavior in resonant or precision timing applications.

Q: What packaging format should I specify for automated assembly?

A: The original part is supplied in Tape & Reel (TR) format. Most substitutes are available in TR format. TDK parts C2012C0G2W821J060AA and C2012C0G2W821K060AA are supplied in Cut Tape (CT) format, requiring different handling in automated pick-and-place equipment.

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