Equivalent & Substitute Parts for 08055C104KA79A

Part Overview

The 08055C104KA79A is a 0.1 µF ±10% 50V ceramic capacitor manufactured by KYOCERA AVX in 0805 (2012 Metric) surface mount package. This multilayer ceramic capacitor (MLCC) with X7R temperature coefficient is designed for general-purpose applications including bypass and decoupling circuits. The part is currently active in production. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and package compatibility to ensure direct board-level interchangeability.

Key Parameters

Parameter	Value
Capacitance	0.1 µF
Tolerance	±10%
Voltage Rating	50V
Temperature Coefficient	X7R
Operating Temperature Range	-55°C to 125°C
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount, MLCC
Physical Dimensions	0.079" L × 0.049" W (2.01mm × 1.25mm)
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Matching Parameters:

Capacitance value: 0.1 µF (exact match required)
Voltage rating: 50V (exact match required)
Temperature coefficient: X7R (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)
Moisture sensitivity level: 1 (Unlimited) (exact match required)

Secondary Considerations:

Tolerance: ±10% (main part) or ±5% (upgrade substitutes with improved tolerance)
Physical thickness: Variations within 0.035" to 0.039" are acceptable for board assembly compatibility
Packaging format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats are interchangeable for procurement and assembly
RoHS and REACH compliance status

Substitute parts are grouped into two categories: direct equivalents matching ±10% tolerance, and upgrade substitutes offering ±5% tolerance with enhanced precision.

Parameter Comparison

Manufacturer	Part Number	Capacitance	Tolerance	Voltage	Temp Coeff	Package	Thickness (Max)	RoHS Status	Packaging Format
KYOCERA AVX	08055C104KA79A	0.1 µF	±10%	50V	X7R	0805	0.037" (0.94mm)	RoHS non-compliant	Bulk
KYOCERA AVX	KGM21NR71H104KT	0.1 µF	±10%	50V	X7R	0805	0.039" (1.00mm)	ROHS3 Compliant	Tape & Reel
KYOCERA AVX	KGM21NR71H104JM	0.1 µF	±5%	50V	X7R	0805	0.039" (1.00mm)	ROHS3 Compliant	Tape & Reel
KYOCERA AVX	KGM21NR71H104JT	0.1 µF	±5%	50V	X7R	0805	0.039" (1.00mm)	ROHS3 Compliant	Tape & Reel
KEMET	C0805C104K5RAC7025	0.1 µF	±10%	50V	X7R	0805	0.035" (0.88mm)	ROHS3 Compliant	Tape & Reel
KEMET	C0805C104K5RAC7210	0.1 µF	±10%	50V	X7R	0805	0.035" (0.88mm)	ROHS3 Compliant	Cut Tape & Digi-Reel
KEMET	C0805C104K5RAC7800	0.1 µF	±10%	50V	X7R	0805	0.035" (0.88mm)	ROHS3 Compliant	Cut Tape & Digi-Reel
YAGEO	CC0805KRX7R9BB104	0.1 µF	±10%	50V	X7R	0805	0.033" (0.85mm)	ROHS3 Compliant	Cut Tape & Digi-Reel
Samsung Electro-Mechanics	CL21B104KBCNFNC	0.1 µF	±10%	50V	X7R	0805	0.037" (0.95mm)	ROHS3 Compliant	Cut Tape & Digi-Reel
Samsung Electro-Mechanics	CL21B104KBCNNNC	0.1 µF	±10%	50V	X7R	0805	0.037" (0.95mm)	ROHS3 Compliant	Cut Tape & Digi-Reel
Samsung Electro-Mechanics	CL21B104KBCNNWC	0.1 µF	±10%	50V	X7R	0805	0.037" (0.95mm)	ROHS3 Compliant	Cut Tape & Digi-Reel

Engineering Selection Recommendations

Direct Equivalents (±10% Tolerance): All substitute parts listed maintain the same electrical specifications as the 08055C104KA79A. KEMET C0805C104K5RAC series (C0805C104K5RAC7025, C0805C104K5RAC7210, C0805C104K5RAC7800), YAGEO CC0805KRX7R9BB104, and Samsung Electro-Mechanics CL21B series (CL21B104KBCNFNC, CL21B104KBCNNNC, CL21B104KBCNNWC) are functionally equivalent with ROHS3 compliance and REACH unaffected status.

Upgrade Substitutes (±5% Tolerance): KYOCERA AVX KGM21NR71H104JM and KGM21NR71H104JT offer improved tolerance specification (±5%) while maintaining all other electrical and mechanical parameters. These parts provide enhanced precision for applications requiring tighter capacitance tolerance.

Direct Equivalent from Original Manufacturer: KYOCERA AVX KGM21NR71H104KT maintains the same manufacturer lineage with ±10% tolerance and ROHS3 compliance, offering continuity with the original part source.

Compliance Considerations: The original 08055C104KA79A is RoHS non-compliant. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for new designs and procurement.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 08055C104KA79A with any of the listed parts? A: Yes. All listed substitute parts match the critical electrical parameters (0.1 µF, ±10%, 50V, X7R) and mechanical specifications (0805 package, surface mount). Physical thickness variations (0.033" to 0.039") are within acceptable tolerances for standard PCB assembly processes.

Q: What is the difference between direct equivalents and upgrade substitutes? A: Direct equivalents maintain ±10% tolerance matching the original part. Upgrade substitutes (KGM21NR71H104JM and KGM21NR71H104JT) offer ±5% tolerance for applications requiring higher capacitance precision. All other specifications remain identical.

Q: Does packaging format affect compatibility? A: Packaging format (Tape & Reel, Cut Tape & Digi-Reel, or Bulk) affects procurement and assembly logistics but not electrical or mechanical compatibility. All formats are suitable for standard pick-and-place assembly equipment.

Q: Are there RoHS compliance differences? A: The original 08055C104KA79A is RoHS non-compliant. All substitute parts are ROHS3 compliant. For new designs or procurement requiring regulatory compliance, any substitute part is appropriate.

Q: Can I use the ±5% tolerance parts as direct replacements? A: Yes. The ±5% tolerance parts (KGM21NR71H104JM, KGM21NR71H104JT) are direct replacements with improved precision. They are electrically and mechanically compatible with designs specified for ±10% tolerance.

Q: What is the significance of different manufacturer part numbers from the same manufacturer? A: KYOCERA AVX part numbers KGM21NR71H104KT, KGM21NR71H104JM, and KGM21NR71H104JT represent different production series or packaging configurations within the same manufacturer's X7R ceramic capacitor line. All are functionally equivalent for the specified application.

Q: Are there any thickness constraints for my PCB assembly? A: Physical thickness ranges from 0.033" (0.85mm) to 0.039" (1.00mm) across all substitute parts. Standard PCB assembly processes accommodate this variation. Verify your specific assembly equipment specifications if operating near tolerance limits.

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