AU103C106KA72A Equivalent & Substitute Parts

Part Overview

The AU103C106KA72A is a 10 µF ceramic capacitor manufactured by KYOCERA AVX in 1210 (3225 Metric) package format with X7R temperature coefficient and 25V rated voltage. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part features gold flash termination and is suitable for general-purpose applications requiring stable capacitance across the operating temperature range of -55°C to 125°C.

Substiute Parts

AU103C106KA72A

KYOCERA AVXIn Stock: 985AU103C106KA72A Datasheet

Current PartRFQ

1210BW106K500NGX110T

Knowles NovacapIn Stock: 162231210BW106K500NGX110T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AU103C106KA72A is determined by the following critical parameters:

• Capacitance Value: Must be 10 µF (exact match required)
• Tolerance: Must be ±10% (exact match required)
• Package / Case: Must be 1210 (3225 Metric) for mechanical and electrical compatibility
• Mounting Type: Must be Surface Mount, MLCC
• Voltage Rating: Substitute must meet or exceed 25V rated voltage
• Temperature Coefficient: X7R or X5R acceptable (both provide stable capacitance across temperature range)
• Operating Temperature Range: Substitute must support minimum -55°C to 85°C (X5R rated to 85°C is acceptable for most applications)
• Moisture Sensitivity Level: MSL 1 required for unlimited shelf life compatibility

The substitute part 1210BW106K500NGX110T meets all mechanical compatibility requirements and exceeds the voltage rating specification, providing enhanced design margin.

Parameter Comparison

Engineering Selection Recommendations

The 1210BW106K500NGX110T from Knowles Novacap is a direct functional substitute for the obsolete AU103C106KA72A. Selection is supported by the following factors:

• Active Product Status: The substitute part is currently in active production, ensuring long-term availability and supply chain continuity.
• Compliance Certifications: The substitute part carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements.
• Voltage Margin: The 50V rating provides a 2x safety margin over the original 25V specification, enhancing circuit reliability.
• Package Compatibility: Both parts use identical 1210 (3225 Metric) surface mount packages with compatible footprints and MSL 1 moisture sensitivity ratings.
• Electrical Equivalence: Matching 10 µF capacitance and ±10% tolerance ensure functional equivalence in general-purpose applications.

The substitute part's X5R temperature coefficient provides stable capacitance performance across -55°C to 85°C, which covers the majority of industrial and commercial operating conditions. Applications requiring the full -55°C to 125°C range of the original part should evaluate the temperature coefficient difference.

Frequently Asked Questions (FAQ)

Q: Can the 1210BW106K500NGX110T directly replace the AU103C106KA72A in existing designs?

A: Yes, for applications operating within -55°C to 85°C. Both parts share identical 10 µF capacitance, ±10% tolerance, 1210 package format, and MSL 1 rating. The substitute's 50V rating exceeds the original 25V specification. Applications requiring operation above 85°C should evaluate the temperature coefficient difference between X7R and X5R.

Q: What is the difference between X7R and X5R temperature coefficients?

A: Both X7R and X5R are Class II ceramic capacitor temperature coefficients providing stable capacitance across temperature ranges. X7R operates -55°C to 125°C with ±15% capacitance change. X5R operates -55°C to 85°C with ±15% capacitance change. For applications within -55°C to 85°C, both coefficients are functionally equivalent.

Q: Are the physical dimensions compatible between the two parts?

A: Both parts use the 1210 (3225 Metric) package with compatible footprints. Dimensional variations (0.126" vs 0.125" length, 0.110" vs 0.065" thickness) are within standard PCB design tolerances and do not affect placement or soldering.

Q: Does the substitute part meet current regulatory requirements?

A: Yes. The 1210BW106K500NGX110T is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.

Q: What is the inventory status of the substitute part?

A: The 1210BW106K500NGX110T has 16,114 pieces in stock as new original inventory, providing immediate availability for production requirements.