KYOCERA AVX 08055C103KAJ4A Equivalent & Substitute Parts

Part Overview

The KYOCERA AVX 08055C103KAJ4A is a 10000 pF ±10% 50V ceramic capacitor with X7R temperature coefficient in 0805 (2012 Metric) surface mount package. This part is Active status and suitable for general purpose applications. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required, or when design upgrades for enhanced compliance, automotive qualification, or higher voltage ratings are necessary.

Key Parameters

Parameter	Value
Capacitance	10000 pF
Tolerance	±10%
Voltage - Rated	50V
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)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are grouped based on the following substitution criteria:

Direct Substitutes (Identical Electrical & Mechanical Specifications): Parts with matching capacitance (10000 pF), tolerance (±10%), voltage rating (50V), temperature coefficient (X7R), package (0805), and operating temperature range (-55°C ~ 125°C). These parts differ only in packaging format (Tape & Reel vs. bulk) or internal series designation.

Upgraded Substitutes (Enhanced Compliance & Certification): Parts maintaining identical electrical specifications but offering ROHS3 compliance, REACH unaffected status, or automotive qualification (AEC-Q200). These are suitable when design requirements mandate higher environmental or automotive standards.

Voltage-Upgraded Substitutes (Higher Voltage Rating): Parts with identical capacitance, tolerance, and package but rated for 200V or 250V. These provide design margin for circuits requiring higher voltage stress capability while maintaining the same physical footprint.

Tolerance-Upgraded Substitutes (Tighter Tolerance): Parts with ±5% tolerance instead of ±10%, providing improved capacitance accuracy for precision applications.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage	Temp Coeff	Package	RoHS Status	Automotive (AEC-Q200)	Inventory
08055C103KAJ4A	KYOCERA AVX	10000 pF	±10%	50V	X7R	0805	Non-compliant	No	923 Pcs
LD055C103KAB2A	KYOCERA AVX	10000 pF	±10%	50V	X7R	0805	Non-compliant	No	15551 Pcs
0805PC103KAT2A	KYOCERA AVX	10000 pF	±10%	250V	X7R	0805	ROHS3 Compliant	No	8603 Pcs
FS055C103KAZ2A	KYOCERA AVX	10000 pF	±10%	50V	X7R	0805	ROHS3 Compliant	Yes (AEC-Q200)	4746 Pcs
KAM21BR71H103KM	KYOCERA AVX	10000 pF	±10%	50V	X7R	0805	ROHS3 Compliant	Yes (AEC-Q200)	31772 Pcs
KAM21BR71H103KT	KYOCERA AVX	10000 pF	±10%	50V	X7R	0805	ROHS3 Compliant	Yes (AEC-Q200)	29166 Pcs
KAS21BR71H103KT	KYOCERA AVX	10000 pF	±10%	50V	X7R	0805	ROHS3 Compliant	Yes (AEC-Q200)	7797 Pcs
KGM21AR72D103JU	KYOCERA AVX	10000 pF	±5%	200V	X7R	0805	ROHS3 Compliant	No	7021 Pcs
KGM21AR72D103KL	KYOCERA AVX	10000 pF	±10%	200V	X7R	0805	ROHS3 Compliant	No	29756 Pcs
KGM21AR72D103KU	KYOCERA AVX	10000 pF	±10%	200V	X7R	0805	ROHS3 Compliant	No	81137 Pcs
KGM21NR71H103KM	KYOCERA AVX	10000 pF	±10%	50V	X7R	0805	ROHS3 Compliant	No	547048 Pcs

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): LD055C103KAB2A and KGM21NR71H103KM are electrically and mechanically identical to the main part. KGM21NR71H103KM offers ROHS3 compliance and significantly higher inventory availability (547048 Pcs).

For Automotive Applications: FS055C103KAZ2A, KAM21BR71H103KM, KAM21BR71H103KT, and KAS21BR71H103KT are qualified to AEC-Q200 and ROHS3 compliant. These are suitable for automotive circuit designs requiring soft termination (FLEXITERM™ Flexisafe) or standard automotive qualification.

For Higher Voltage Margin: 0805PC103KAT2A (250V), KGM21AR72D103JU (200V ±5%), KGM21AR72D103KL (200V ±10%), and KGM21AR72D103KU (200V ±10%) provide elevated voltage ratings while maintaining the same capacitance and package. These are ROHS3 compliant and suitable for designs requiring increased voltage stress capability.

For Tighter Tolerance Requirements: KGM21AR72D103JU offers ±5% tolerance with 200V rating and ROHS3 compliance for precision applications requiring improved capacitance accuracy.

Frequently Asked Questions (FAQ)

Q: Can I use KGM21NR71H103KM as a direct replacement for 08055C103KAJ4A? A: Yes. Both parts have identical electrical specifications (10000 pF ±10% 50V X7R), the same 0805 package, and matching operating temperature range (-55°C ~ 125°C). KGM21NR71H103KM additionally offers ROHS3 compliance and superior inventory availability.

Q: What is the difference between the 50V and 200V/250V rated substitutes? A: The voltage rating indicates the maximum voltage the capacitor can withstand. Higher voltage rated parts (200V, 250V) provide design margin for circuits with elevated voltage stress but occupy slightly more physical space due to thicker dielectric. All maintain the same 0805 footprint and capacitance value.

Q: Are automotive-qualified parts (AEC-Q200) compatible with non-automotive designs? A: Yes. AEC-Q200 qualified parts meet automotive reliability standards and are fully compatible with general purpose applications. They offer enhanced reliability and compliance benefits without functional incompatibility.

Q: What does ROHS3 compliance mean for substitution? A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations. Parts marked ROHS3 Compliant can be used in designs requiring environmental compliance. The original part (08055C103KAJ4A) is RoHS non-compliant; upgraded substitutes provide ROHS3 compliance if required by design specifications.

Q: Does tolerance affect substitutability? A: Tolerance affects capacitance accuracy. The original part has ±10% tolerance. KGM21AR72D103JU offers ±5% tolerance for applications requiring tighter capacitance control. Both are electrically compatible; tolerance selection depends on circuit precision requirements.

Q: Can I mix different substitute parts in the same design? A: Yes, provided all selected parts meet the circuit's electrical requirements (capacitance, voltage, temperature coefficient). However, maintaining consistent part numbers across production batches is recommended for quality control and traceability.

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