F971A336KBA Equivalent & Substitute Parts

Part Overview

The F971A336KBA is a 33 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 10 V operation in a 1411 (3528 Metric) surface mount package. This component is designed for applications requiring compact, high-reliability energy storage with automotive-grade performance. The part is currently active in production with full RoHS3 compliance and AEC-Q200 automotive qualification. Substitute parts are identified to provide design flexibility, inventory alternatives, and sourcing options while maintaining electrical and mechanical compatibility.

Substiute Parts

F971A336KBA

KYOCERA AVXIn Stock: 1115F971A336KBA Datasheet

Current PartRFQ

T491B336K010AT

KEMETIn Stock: 2839T491B336K010AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F971A336KBA is determined by strict alignment of the following parameters:

• Capacitance Value: 33 µF (exact match required)
• Voltage Rating: 10 V (exact match required)
• Tolerance: ±10% (exact match required)
• Package / Case: 1411 (3528 Metric) (exact match required for PCB compatibility)
• Mounting Type: Surface Mount (exact match required)
• Type: Molded Tantalum (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)

The identified substitute part T491B336K010AT from KEMET meets all mandatory substitution criteria. Both parts share identical electrical ratings, mechanical dimensions, and thermal operating specifications, enabling direct replacement in circuit designs.

Parameter Comparison

Engineering Selection Recommendations

Both the F971A336KBA and T491B336K010AT are active production components with full RoHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.

The F971A336KBA carries AEC-Q200 automotive qualification and high-reliability designation, making it the primary choice for automotive and mission-critical applications requiring formal qualification documentation.

The T491B336K010AT provides equivalent electrical performance with a marginally lower ESR (1.8 Ohm versus 1.9 Ohm) and reduced seated height (2.10mm versus 2.30mm), offering potential advantages in space-constrained designs. This part is classified as general purpose and includes a specified lifetime rating of 2000 hours at 125°C.

Selection between these parts should be based on application requirements: automotive qualification needs, available inventory, and specific thermal or space constraints within the circuit design.

Frequently Asked Questions (FAQ)

Q: Can T491B336K010AT replace F971A336KBA in automotive applications?

A: Both parts share identical electrical ratings, voltage specifications, and operating temperature ranges. However, the F971A336KBA carries AEC-Q200 automotive qualification while the T491B336K010AT is designated general purpose. Automotive applications requiring formal qualification documentation should use the F971A336KBA.

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

A: The T491B336K010AT has an ESR of 1.8 Ohm compared to 1.9 Ohm for the F971A336KBA. This 0.1 Ohm difference is negligible for most circuit applications and does not affect substitution eligibility.

Q: Are the physical dimensions identical?

A: Both parts use the 1411 (3528 Metric) package with identical length and width (4.60mm x 2.80mm). The seated height differs slightly: F971A336KBA is 2.30mm maximum while T491B336K010AT is 2.10mm maximum. This difference is within typical PCB assembly tolerances and does not prevent direct substitution.

Q: What does the MSL (Moisture Sensitivity Level) difference mean?

A: The F971A336KBA has MSL 3 (168 hours) while T491B336K010AT has MSL 1 (unlimited). MSL 1 indicates superior moisture resistance and longer shelf life without desiccant storage requirements. This is an advantage for the KEMET part in supply chain and storage scenarios.

Q: Are both parts RoHS3 compliant?

A: Yes, both F971A336KBA and T491B336K010AT are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.