08056D105MAT4A Ceramic Capacitor Equivalent & Substitute Parts

Part Overview

The 08056D105MAT4A is a 1 µF ±20% 6.3V ceramic capacitor manufactured by KYOCERA AVX in 0805 (2012 Metric) surface mount package. This multilayer ceramic capacitor (MLCC) with X5R temperature coefficient is designed for general-purpose applications requiring stable capacitance across the operating temperature range of -55°C to 85°C. The part is ROHS3 compliant with MSL 1 rating and is currently in active production status with 843 units in stock. Substitute parts are identified when design requirements allow for higher voltage ratings, improved tolerance specifications, or when inventory availability necessitates alternative sourcing from the same manufacturer.

Key Parameters

Parameter	Value
Capacitance	1 µF
Voltage Rating	6.3V
Tolerance	±20%
Temperature Coefficient	X5R
Operating Temperature Range	-55°C to 85°C
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount, MLCC
Physical Dimensions	0.079" L x 0.049" W (2.01mm x 1.25mm)
Thickness (Max)	0.055" (1.40mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 08056D105MAT4A is permissible based on the following criteria:

Allowed Parameter Variations:

Voltage Rating: Higher voltage ratings (10V, 16V, 25V, 50V) are acceptable substitutes as they provide increased design margin while maintaining the same capacitance value and package footprint
Tolerance: Improved tolerance specifications (±10%) are acceptable substitutes as they provide tighter capacitance control
Manufacturer: KYOCERA AVX and KEMET parts meeting identical mechanical and electrical specifications are interchangeable

Fixed Parameters (No Substitution Allowed):

Capacitance: 1 µF (must remain constant)
Temperature Coefficient: X5R (must remain constant)
Package / Case: 0805 (2012 Metric) (must remain constant)
Operating Temperature Range: -55°C to 85°C (must remain constant)
Mounting Type: Surface Mount, MLCC (must remain constant)
RoHS Status: ROHS3 Compliant (must remain constant)
Moisture Sensitivity Level: 1 (must remain constant)

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage Rating	Temperature Coefficient	Package	Thickness (Max)	Inventory (Pcs)	Product Status
08056D105MAT4A	KYOCERA AVX	1 µF	±20%	6.3V	X5R	0805 (2012 Metric)	0.055" (1.40mm)	843	Active
08056D105KAT2A	KYOCERA AVX	1 µF	±10%	6.3V	X5R	0805 (2012 Metric)	0.055" (1.40mm)	1190	Active
0805ZD105KAT2A	KYOCERA AVX	1 µF	±10%	10V	X5R	0805 (2012 Metric)	0.055" (1.40mm)	3450	Active
KGM21AR51C105KL	KYOCERA AVX	1 µF	±10%	16V	X5R	0805 (2012 Metric)	0.057" (1.45mm)	22016	Active
KGM21AR51C105KU	KYOCERA AVX	1 µF	±10%	16V	X5R	0805 (2012 Metric)	0.057" (1.45mm)	232844	Active
KGM21AR51C105MU	KYOCERA AVX	1 µF	±20%	16V	X5R	0805 (2012 Metric)	0.057" (1.45mm)	3309	Active
KGM21AR51E105KU	KYOCERA AVX	1 µF	±10%	25V	X5R	0805 (2012 Metric)	0.057" (1.45mm)	36750	Active
KGM21AR51E105MU	KYOCERA AVX	1 µF	±20%	25V	X5R	0805 (2012 Metric)	0.057" (1.45mm)	8046	Active
KGM21AR51H105KU	KYOCERA AVX	1 µF	±10%	50V	X5R	0805 (2012 Metric)	0.057" (1.45mm)	12351	Active
KGM21AR51H105MU	KYOCERA AVX	1 µF	±20%	50V	X5R	0805 (2012 Metric)	0.057" (1.45mm)	4436	Active
C0805C105K3PAC7800	KEMET	1 µF	±10%	25V	X5R	0805 (2012 Metric)	0.055" (1.40mm)	160741	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance with MSL 1 rating, ensuring continued availability and regulatory conformance. Selection between substitute parts is determined by circuit voltage requirements and tolerance specifications:

For applications with 6.3V maximum circuit voltage, 08056D105KAT2A provides improved ±10% tolerance specification while maintaining the original voltage rating and package dimensions.

For applications tolerating higher voltage ratings, 0805ZD105KAT2A (10V), KGM21AR51C105KL or KGM21AR51C105KU (16V), KGM21AR51E105KU (25V), and KGM21AR51H105KU (50V) offer increased design margin. The KGM21AR51C105KU variant provides the highest inventory availability (232,844 units) among 16V options.

For tolerance-critical applications, all ±10% tolerance variants (08056D105KAT2A, 0805ZD105KAT2A, KGM21AR51C105KL, KGM21AR51C105KU, KGM21AR51E105KU, KGM21AR51H105KU, C0805C105K3PAC7800) are suitable. The KEMET C0805C105K3PAC7800 provides cross-manufacturer compatibility at 25V rating with exceptional inventory depth (160,741 units).

Physical thickness variation exists between standard 0805 parts (0.055" maximum) and KGM series parts (0.057" maximum). This 0.002" difference must be verified against PCB assembly clearance requirements before substitution.

Frequently Asked Questions (FAQ)

Q: Can I substitute 08056D105MAT4A with a higher voltage rated part?

A: Yes. Higher voltage ratings (10V, 16V, 25V, 50V) are direct substitutes. The capacitance value (1 µF), temperature coefficient (X5R), package (0805), and operating temperature range remain identical. Higher voltage ratings provide increased design margin without affecting circuit performance in applications rated for 6.3V or lower.

Q: What is the difference between ±20% and ±10% tolerance parts?

A: Tolerance specifies the allowable deviation from the nominal 1 µF capacitance value. ±20% tolerance allows capacitance between 0.8 µF and 1.2 µF. ±10% tolerance allows capacitance between 0.9 µF and 1.1 µF. Applications requiring tighter capacitance control should specify ±10% tolerance variants.

Q: Are KYOCERA AVX and KEMET parts interchangeable?

A: Yes, when electrical and mechanical specifications are identical. The KEMET C0805C105K3PAC7800 matches the 08056D105MAT4A in capacitance (1 µF), temperature coefficient (X5R), package (0805), and compliance ratings. Verify with your procurement and quality assurance processes before implementing cross-manufacturer substitution.

Q: Does the thickness difference between 0.055" and 0.057" affect PCB assembly?

A: The 0.002" thickness difference is minimal but must be verified against PCB design clearances, particularly in high-density layouts or applications with height constraints. Standard PCB assembly processes accommodate both thicknesses without modification.

Q: Which substitute part has the best inventory availability?

A: KGM21AR51C105KU (KYOCERA AVX, 16V, ±10% tolerance) has 232,844 units in stock, followed by C0805C105K3PAC7800 (KEMET, 25V, ±10% tolerance) with 160,741 units. Both provide immediate availability for high-volume production requirements.

Q: Can I use a 50V rated part in a 6.3V circuit?

A: Yes. The 50V rating indicates maximum voltage withstand capability. Using a higher-rated part in a lower-voltage circuit introduces no electrical risk and provides additional design margin. The capacitance value and performance characteristics remain unchanged.

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