Equivalent & Substitute Parts for F971D225MAAHT3

Part Overview

The F971D225MAAHT3 is a 2.2 µF molded tantalum capacitor rated at 20 V in a 1206 (3216 Metric) surface mount package, manufactured by KYOCERA AVX. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The part is qualified to AEC-Q200 automotive standards with high reliability features and ROHS3 compliance.

Substiute Parts

F971D225MAAHT3

KYOCERA AVXIn Stock: 904F971D225MAAHT3 Datasheet

Current PartRFQ

T494A225M020AT

KEMETIn Stock: 4773T494A225M020AT Datasheet

UpgradeRFQ

T491A225M006AT

KEMETIn Stock: 10152T491A225M006AT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the F971D225MAAHT3 is determined by the following critical parameters:

• Capacitance Value: 2.2 µF (must match exactly)
• Tolerance: ±20% (must match)
• Voltage Rating: 20 V minimum (equal or higher acceptable)
• Package / Case: 1206 (3216 Metric) (must match for PCB compatibility)
• Mounting Type: Surface Mount (must match)
• Type: Molded Tantalum (must match)

Two substitute parts meet these criteria:

T494A225M020AT (KEMET) - Direct upgrade with identical voltage rating and improved ESR performance. Active product status with superior availability.

T491A225M006AT (KEMET) - Manufacturer-recommended alternative with lower voltage rating (6.3 V). Suitable only for applications where the 20 V rating is not required.

Parameter Comparison

Engineering Selection Recommendations

T494A225M020AT is the primary substitute for direct replacement. This part maintains the 20 V voltage rating, provides improved ESR performance (4 Ohm vs. 6.3 Ohm), and carries active product status with ROHS3 compliance. The lower MSL rating (1 vs. 3) indicates superior moisture handling characteristics. This part is suitable for applications requiring the full 20 V rating specification.

T491A225M006AT is applicable only in applications where the circuit voltage requirement does not exceed 6.3 V. While this part offers active status and ROHS3 compliance, the reduced voltage rating restricts its use to lower-voltage circuit designs. The higher ESR (8 Ohm) should be evaluated against circuit performance requirements.

Both substitute parts maintain identical capacitance, tolerance, package dimensions, and mounting type, ensuring PCB-level compatibility with the original F971D225MAAHT3.

Frequently Asked Questions (FAQ)

Q: Can T494A225M020AT be used as a direct replacement for F971D225MAAHT3?

A: Yes. Both parts share identical capacitance (2.2 µF), tolerance (±20%), voltage rating (20 V), package (1206), and mounting type (Surface Mount). The T494A225M020AT offers improved ESR performance and active product availability.

Q: What is the key difference between T494A225M020AT and T491A225M006AT?

A: The primary difference is voltage rating. T494A225M020AT is rated at 20 V, matching the original part specification. T491A225M006AT is rated at 6.3 V and is suitable only for applications not requiring the full 20 V rating. Both maintain the same capacitance and package dimensions.

Q: Are there any temperature operating range differences?

A: Yes. The F971D225MAAHT3 operates from -55°C to 135°C, while both KEMET substitutes operate from -55°C to 125°C. Applications requiring operation above 125°C should verify compatibility with the reduced upper temperature limit.

Q: Does MSL rating affect component selection?

A: The F971D225MAAHT3 has MSL 3 (168 hours), while both substitutes have MSL 1 (unlimited). Lower MSL ratings indicate better moisture resistance and longer shelf life. This is advantageous for supply chain and storage considerations.

Q: Are all three parts ROHS3 compliant?

A: Yes. F971D225MAAHT3, T494A225M020AT, and T491A225M006AT are all ROHS3 compliant, meeting environmental and regulatory requirements.