Equivalent & Substitute Parts for 08055C683KAJ2A

Part Overview

The 08055C683KAJ2A is a 0.068 µF ±10% 50V ceramic capacitor in 0805 (2012 Metric) surface mount package manufactured by KYOCERA AVX. This multilayer ceramic capacitor (MLCC) with X7R temperature coefficient is designed for general purpose applications including bypass and decoupling functions. The part is currently active in production with 1,137 pieces in stock. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements such as improved compliance status or enhanced tolerance specifications.

Key Parameters

Parameter	Value
Capacitance	0.068 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 strict equivalence across the following critical parameters:

Capacitance Value: 0.068 µF (exact match required)
Voltage Rating: 50V minimum (equal or higher acceptable for direct substitution)
Temperature Coefficient: X7R (required for temperature stability equivalence)
Package / Case: 0805 (2012 Metric) (physical and electrical compatibility)
Mounting Type: Surface Mount, MLCC (assembly process compatibility)
Operating Temperature Range: -55°C to 125°C (functional equivalence)
Moisture Sensitivity Level: 1 (Unlimited) (handling and storage compatibility)

Substitute parts are categorized as follows:

Direct Substitutes (identical electrical and mechanical specifications):

LD055C683KAB2A (KYOCERA AVX)
0805B683K500CT (Walsin Technology Corporation)
C0805C683K5RAC7800 (KEMET)
CC0805KRX7R9BB683 (YAGEO)
VJ0805Y683KXACW1BC (Vishay Vitramon)

Upgrade Substitutes (enhanced specifications while maintaining core compatibility):

KAM21BR71H683KT (KYOCERA AVX) – AEC-Q200 rated, automotive grade, ROHS3 compliant
KGM21NR71H683JT (KYOCERA AVX) – ±5% tolerance, ROHS3 compliant
KGM21NR71H683KT (KYOCERA AVX) – ROHS3 compliant, higher inventory availability
C0805C683J5RAC7800 (KEMET) – ±5% tolerance, ROHS3 compliant
C0805F683K1RAC7800 (KEMET) – 100V rating (higher voltage margin), ROHS3 compliant

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Tolerance	Voltage	Temp Coeff	Package	Thickness (Max)	RoHS Status	Inventory (Pcs)
08055C683KAJ2A	KYOCERA AVX	0.068 µF	±10%	50V	X7R	0805	0.037" (0.94mm)	Non-compliant	1,137
LD055C683KAB2A	KYOCERA AVX	0.068 µF	±10%	50V	X7R	0805	0.037" (0.94mm)	Non-compliant	8,839
KAM21BR71H683KT	KYOCERA AVX	0.068 µF	±10%	50V	X7R	0805	0.037" (0.94mm)	ROHS3 Compliant	26,101
KGM21NR71H683JT	KYOCERA AVX	0.068 µF	±5%	50V	X7R	0805	0.039" (1.00mm)	ROHS3 Compliant	14,622
KGM21NR71H683KT	KYOCERA AVX	0.068 µF	±10%	50V	X7R	0805	0.039" (1.00mm)	ROHS3 Compliant	58,879
0805B683K500CT	Walsin Technology	0.068 µF	±10%	50V	X7R	0805	0.035" (0.90mm)	ROHS3 Compliant	16,400
C0805C683K5RAC7800	KEMET	0.068 µF	±10%	50V	X7R	0805	0.039" (1.00mm)	ROHS3 Compliant	24,877
CC0805KRX7R9BB683	YAGEO	0.068 µF	±10%	50V	X7R	0805	0.037" (0.95mm)	ROHS3 Compliant	500,100
VJ0805Y683KXACW1BC	Vishay Vitramon	0.068 µF	±10%	50V	X7R	0805	0.035" (0.90mm)	ROHS3 Compliant	3,108
C0805C683J5RAC7800	KEMET	0.068 µF	±5%	50V	X7R	0805	0.039" (1.00mm)	ROHS3 Compliant	14,419
C0805F683K1RAC7800	KEMET	0.068 µF	±10%	100V	X7R	0805	0.055" (1.40mm)	ROHS3 Compliant	4,243

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications)

LD055C683KAB2A, 0805B683K500CT, C0805C683K5RAC7800, CC0805KRX7R9BB683, and VJ0805Y683KXACW1BC are electrically and mechanically equivalent to 08055C683KAJ2A. Selection among these direct substitutes should prioritize inventory availability and supply chain logistics. CC0805KRX7R9BB683 (YAGEO) offers the highest inventory level at 500,100 pieces, supporting extended production runs and supply security.

For Compliance-Driven Applications

KAM21BR71H683KT, KGM21NR71H683KT, and KGM21NR71H683JT (KYOCERA AVX series) are ROHS3 compliant alternatives. KAM21BR71H683KT carries AEC-Q200 automotive qualification, suitable for automotive and mission-critical applications. KGM21NR71H683KT provides the largest inventory (58,879 pieces) among KYOCERA AVX ROHS3-compliant options.

For Enhanced Tolerance Requirements

KGM21NR71H683JT (KYOCERA AVX) and C0805C683J5RAC7800 (KEMET) offer ±5% tolerance, providing tighter capacitance control compared to the ±10% specification of the main part. These are suitable for precision analog circuits and filtering applications requiring improved tolerance margins.

For Higher Voltage Margin Applications

C0805F683K1RAC7800 (KEMET) provides 100V rating while maintaining 0.068 µF capacitance and X7R temperature coefficient. This upgrade is applicable when circuit design requires additional voltage headroom or when operating conditions may exceed the 50V nominal rating.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with ±5% tolerance instead of ±10%?

A: Yes. A ±5% tolerance part (KGM21NR71H683JT or C0805C683J5RAC7800) is a direct upgrade and will function in any circuit designed for ±10% tolerance. The tighter tolerance provides improved capacitance accuracy without compromising compatibility.

Q: Is the 100V rated part (C0805F683K1RAC7800) compatible with a 50V circuit?

A: Yes. A higher voltage rating is compatible with lower voltage applications. However, the 100V part has increased thickness (0.055" vs. 0.037"), which may affect PCB layout and assembly clearances. Verify mechanical fit before substitution.

Q: What is the difference between ROHS3 compliant and non-compliant parts?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. For new designs and regulated applications, ROHS3 compliant parts are required. The original 08055C683KAJ2A is non-compliant; ROHS3 alternatives include KAM21BR71H683KT, KGM series, and all KEMET and YAGEO options listed.

Q: Does packaging format (Tape & Reel vs. Cut Tape) affect electrical performance?

A: No. Packaging format affects only handling, storage, and assembly logistics. Electrical and mechanical specifications remain identical regardless of packaging. Select based on production volume and assembly equipment compatibility.

Q: Can I substitute a KYOCERA AVX part with a YAGEO or KEMET part?

A: Yes. All listed substitutes meet identical electrical specifications (0.068 µF, ±10%, 50V, X7R, 0805 package). Manufacturer differences do not affect circuit performance when specifications are equivalent. Cross-manufacturer substitution is standard practice in electronics manufacturing.

Q: What does AEC-Q200 rating mean for KAM21BR71H683KT?

A: AEC-Q200 is an automotive qualification standard indicating the part meets stringent reliability and performance requirements for automotive applications. This certification is required for automotive designs but is not necessary for general industrial or consumer applications.

Q: Are there any thickness constraints I should consider?

A: Yes. Thickness varies from 0.035" (0.90mm) to 0.055" (1.40mm) across substitute options. Verify PCB layout clearances, especially for high-density designs or when components are mounted on both sides of the board. The original part thickness is 0.037" (0.94mm).

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