F971V334MAAHT3 Equivalent & Substitute Parts

Part Overview

The F971V334MAAHT3 is a 0.33 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 35 V operation in a 1206 (3216 Metric) surface mount package. This component is designed for applications requiring stable capacitance with high reliability in automotive and demanding environments. The part maintains Active product status with full RoHS3 compliance and AEC-Q200 automotive qualification. Substitute parts are identified when equivalent electrical and mechanical specifications can be maintained across different manufacturers while preserving functional performance in target applications.

Substiute Parts

F971V334MAAHT3

KYOCERA AVXIn Stock: 768F971V334MAAHT3 Datasheet

Current PartRFQ

T491A334M035AT

KEMETIn Stock: 11821T491A334M035AT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F971V334MAAHT3 is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 0.33 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Voltage Rating: 35 V (exact match or higher required)
• Package / Case: 1206 (3216 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Physical Dimensions: 0.126" L x 0.063" W / 3.20mm x 1.60mm (exact match required)
• Type: Molded Tantalum (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

The KEMET T491A334M035AT meets all substitution criteria, maintaining identical electrical ratings, package specifications, and compliance certifications. Differences in ESR (Equivalent Series Resistance), operating temperature range, and moisture sensitivity level do not preclude substitution when the application requirements fall within the substitute part's specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the F971V334MAAHT3 and T491A334M035AT are Active product status components with full RoHS3 compliance. The F971V334MAAHT3 carries AEC-Q200 automotive qualification and is specified for high reliability applications. The T491A334M035AT is classified as General Purpose but maintains equivalent electrical and mechanical specifications for the core substitution parameters.

Selection between these parts should be based on application-specific requirements:

• F971V334MAAHT3: Preferred for automotive and high-reliability applications requiring AEC-Q200 qualification and extended operating temperature range to 135°C.
• T491A334M035AT: Suitable for general purpose applications where the operating temperature range of -55°C to 125°C and MSL 1 moisture sensitivity are acceptable.

Both parts are available in production quantities and maintain identical package footprints, enabling direct PCB-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can T491A334M035AT replace F971V334MAAHT3 in automotive applications?

A: The T491A334M035AT meets all core electrical and mechanical substitution criteria. However, it lacks AEC-Q200 automotive qualification. Use in automotive applications requires design review to confirm that General Purpose classification is acceptable for the specific end-use.

Q: What is the impact of the 3 Ohm ESR difference between these parts?

A: The F971V334MAAHT3 has 12 Ohm ESR while T491A334M035AT has 15 Ohm ESR. This 3 Ohm difference may affect ripple current handling and thermal performance in high-frequency switching applications. Verify that the substitute part's ESR specification meets circuit requirements.

Q: Are there PCB layout considerations for substitution?

A: Both parts use identical 1206 (3216 Metric) packages with matching physical dimensions and height specifications. No PCB layout modifications are required for direct substitution.

Q: What does MSL 3 versus MSL 1 mean for handling and storage?

A: MSL 3 (F971V334MAAHT3) requires controlled moisture exposure with a 168-hour floor life after bag opening. MSL 1 (T491A334M035AT) has unlimited floor life. The substitute part offers superior moisture tolerance, reducing handling constraints.

Q: Do both parts meet RoHS3 compliance requirements?

A: Yes. Both F971V334MAAHT3 and T491A334M035AT are ROHS3 Compliant with REACH Unaffected status, suitable for applications with RoHS regulatory requirements.