F971E225KBA Equivalent & Substitute Parts

Part Overview

The F971E225KBA is a 2.2 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 25 V operation. This component is designed for surface mount applications in the 1411 (3528 Metric) package format. The part is currently in active production status and meets automotive-grade reliability standards with AEC-Q200 certification. Substitute parts are identified when equivalent electrical and mechanical parameters are available from alternative manufacturers, enabling procurement flexibility and supply chain continuity.

Substiute Parts

F971E225KBA

KYOCERA AVXIn Stock: 804F971E225KBA Datasheet

Current PartRFQ

T491B225K025AT

KEMETIn Stock: 3682T491B225K025AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F971E225KBA is determined by strict equivalence across the following parameters:

• Capacitance value: 2.2 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage rating: 25 V (exact match required)
• Package / Case: 1411 (3528 Metric) (exact match required)
• Mounting type: Surface Mount (exact match required)
• Operating temperature range: -55°C ~ 125°C (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)

The T491B225K025AT from KEMET meets all substitution criteria. Variations in ESR (Equivalent Series Resistance), MSL rating, and packaging format (Cut Tape vs. Tape & Reel) do not disqualify substitution eligibility when all primary electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

Both the F971E225KBA and T491B225K025AT are active production components with ROHS3 compliance and REACH unaffected status. The F971E225KBA carries AEC-Q200 automotive qualification, designating it for high-reliability applications. The T491B225K025AT is classified as general purpose but maintains equivalent electrical performance within the specified operating temperature range.

Selection between these parts should be based on application requirements: the F971E225KBA is appropriate for automotive and high-reliability environments, while the T491B225K025AT serves general industrial applications. The ESR differential (3.8 Ohm vs. 4.5 Ohm) and MSL rating difference (3 vs. 1) are secondary considerations that do not affect substitution eligibility when primary electrical parameters are matched.

Frequently Asked Questions (FAQ)

Q: Can T491B225K025AT replace F971E225KBA in automotive applications?

A: Both parts meet the same electrical specifications (2.2 µF, 25 V, ±10% tolerance) and operate across -55°C to 125°C. However, the F971E225KBA carries AEC-Q200 certification for automotive use. Application requirements should determine whether general-purpose qualification is acceptable.

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

A: The F971E225KBA has 3.8 Ohm ESR while the T491B225K025AT has 4.5 Ohm ESR. Both values are within acceptable ranges for 2.2 µF tantalum capacitors at 25 V. ESR impact on circuit performance depends on specific application frequency and current characteristics.

Q: Are there packaging differences that affect board assembly?

A: Both parts use the 1411 (3528 Metric) package with identical length and width (4.60mm x 2.80mm). The F971E225KBA has a maximum seated height of 2.30mm while the T491B225K025AT is 2.10mm. This 0.20mm difference is negligible for most PCB designs. Packaging format differs (Tape & Reel vs. Cut Tape & Digi-Reel), which affects procurement and handling but not circuit compatibility.

Q: What does MSL rating mean for these capacitors?

A: MSL (Moisture Sensitivity Level) indicates moisture absorption limits during storage. The F971E225KBA is MSL 3 (168 hours maximum before reflow), while T491B225K025AT is MSL 1 (unlimited storage). Lower MSL ratings provide greater flexibility in inventory management and reduce risk of moisture-related failures during assembly.

Q: Are both parts RoHS compliant?

A: Yes, both the F971E225KBA and T491B225K025AT are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.