12103C394KAT2A Equivalent & Substitute Parts

Part Overview

The 12103C394KAT2A is a 0.39 µF ceramic capacitor manufactured by KYOCERA AVX, rated for 25V with X7R temperature coefficient in 1210 (3225 Metric) surface mount package. This component is designed for general purpose applications and is currently in active production status with 818 units available in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter constraints.

Substiute Parts

12103C394KAT2A

KYOCERA AVXIn Stock: 91212103C394KAT2A Datasheet

Current PartRFQ

C1210C394K5RAC7800

KEMETIn Stock: 4531C1210C394K5RAC7800 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 12103C394KAT2A is determined by the following critical parameters:

• Capacitance Value: Must be 0.39 µF ±10%
• Temperature Coefficient: Must be X7R to maintain stable performance across the operating temperature range of -55°C to 125°C
• Package / Case: Must be 1210 (3225 Metric) for mechanical and electrical compatibility
• Mounting Type: Must be Surface Mount, MLCC
• Voltage Rating: Must be equal to or greater than 25V

The substitute part C1210C394K5RAC7800 from KEMET meets all substitution criteria with a higher voltage rating of 50V, which provides additional design margin while maintaining identical capacitance, tolerance, temperature coefficient, and package specifications.

Parameter Comparison

Engineering Selection Recommendations

The C1210C394K5RAC7800 substitute from KEMET is electrically and mechanically compatible with the 12103C394KAT2A. Both components are ROHS3 compliant, carry MSL 1 rating, and operate across the identical temperature range. The substitute part features a 50V voltage rating compared to the original 25V specification, which provides increased voltage margin in the circuit design. Both components are in active production status with established supply availability. The thickness difference of 0.004" (0.11mm) is within typical PCB assembly tolerances and does not affect placement or functionality.

Frequently Asked Questions (FAQ)

Q: Can the C1210C394K5RAC7800 be used as a direct replacement for the 12103C394KAT2A?

A: Yes. Both components share identical capacitance (0.39 µF), tolerance (±10%), temperature coefficient (X7R), package (1210), and operating temperature range (-55°C to 125°C). The substitute has a higher voltage rating (50V vs 25V), which is compatible with circuits designed for 25V operation.

Q: What is the significance of the higher 50V rating on the substitute part?

A: The 50V rating on the C1210C394K5RAC7800 provides additional voltage margin and design flexibility. It can be used in any application where the original 25V part was specified, as long as the actual circuit voltage does not exceed 25V.

Q: Are there any physical differences that affect PCB assembly?

A: The substitute part has a maximum thickness of 0.041" (1.05mm) compared to 0.037" (0.94mm) for the original. This 0.004" difference is within standard PCB assembly tolerances and does not affect placement, soldering, or functionality.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both the 12103C394KAT2A and C1210C394K5RAC7800 carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

Q: Are both parts RoHS compliant?

A: Yes. Both components are ROHS3 compliant and meet environmental regulatory requirements for electronic component manufacturing and use.