F971C225MAAHT3 Equivalent & Substitute Parts

Part Overview

The F971C225MAAHT3 is a 2.2 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 16 V operation in a 1206 (3216 Metric) surface mount package. This component is designed for applications requiring high reliability and automotive-grade performance. The part is currently in active production status with 909 units available in inventory. Substitute parts are identified when original stock becomes unavailable or when design requirements permit operation at lower voltage ratings while maintaining equivalent capacitance and package compatibility.

Substiute Parts

F971C225MAAHT3

KYOCERA AVXIn Stock: 919F971C225MAAHT3 Datasheet

Current PartRFQ

T491A225M006AT

KEMETIn Stock: 10152T491A225M006AT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F971C225MAAHT3 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 2.2 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Package / Case: 1206 (3216 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Type: Molded Tantalum (exact match required)

Allowable Variation Parameters:

• Voltage - Rated: May be lower than 16 V if circuit design permits
• ESR: May vary within acceptable operating limits
• Operating Temperature Range: May be narrower if application requirements are met
• Moisture Sensitivity Level: May differ based on storage and handling conditions

The substitute part T491A225M006AT meets all mandatory matching criteria. The voltage rating is reduced from 16 V to 6.3 V, which is permissible only in applications where the circuit operates at or below 6.3 V. The ESR increases from 5 Ohm to 8 Ohm, which may impact high-frequency performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

F971C225MAAHT3 (Primary Selection): Select this part when the circuit operates at voltages up to 16 V and automotive-grade reliability is required. This component carries AEC-Q200 certification and is rated for high-reliability applications. The higher voltage rating provides design margin for circuits with voltage transients or future design modifications. The operating temperature range extends to 135°C, suitable for underhood automotive environments.

T491A225M006AT (Substitute Selection): Select this part only when the circuit design operates exclusively at or below 6.3 V and the reduced operating temperature range (-55°C ~ 125°C) is acceptable for the application. This substitute is suitable for general-purpose applications where automotive certification is not required. The lower moisture sensitivity level (MSL 1) provides handling advantages during storage and assembly. The higher ESR (8 Ohm versus 5 Ohm) may affect performance in high-frequency filtering applications.

Both parts are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can T491A225M006AT be used in place of F971C225MAAHT3 in all applications?

A: No. The T491A225M006AT has a maximum voltage rating of 6.3 V, compared to 16 V for the F971C225MAAHT3. Substitution is only valid if the circuit operates at or below 6.3 V. Additionally, the F971C225MAAHT3 carries AEC-Q200 automotive certification, which the substitute does not provide.

Q: What is the impact of the ESR difference between these parts?

A: The F971C225MAAHT3 has an ESR of 5 Ohm, while the T491A225M006AT has an ESR of 8 Ohm. In applications requiring low impedance at high frequencies or rapid charge/discharge cycles, the higher ESR of the substitute may result in increased heat generation and reduced filtering effectiveness.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the 1206 (3216 Metric) package with identical dimensions: 0.126" L x 0.063" W (3.20mm x 1.60mm) and a maximum seated height of 0.071" (1.80mm). They are mechanically interchangeable on the PCB.

Q: What does the MSL rating difference mean for handling?

A: The F971C225MAAHT3 has MSL 3 (168 Hours), requiring controlled moisture exposure during storage and assembly. The T491A225M006AT has MSL 1 (Unlimited), meaning it has no moisture sensitivity restrictions and can be stored in standard conditions without special precautions.

Q: Can the substitute be used in automotive applications?

A: The T491A225M006AT is not AEC-Q200 certified and is classified as general-purpose. It should not be used in automotive applications where AEC-Q200 certification is a design requirement. The F971C225MAAHT3 is the appropriate choice for automotive-grade reliability.

Q: What is the temperature operating range difference?

A: The F971C225MAAHT3 operates from -55°C to 135°C, while the T491A225M006AT operates from -55°C to 125°C. The F971C225MAAHT3 is suitable for high-temperature automotive underhood environments, whereas the substitute is limited to 125°C maximum.