F971D335MBA Equivalent & Substitute Parts

Part Overview

The F971D335MBA is a 3.3 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 20 V operation in a 1411 (3528 Metric) surface mount package. This component is designed for applications requiring compact, high-reliability capacitive storage with automotive-grade performance. The part maintains Active product status with full RoHS3 compliance and AEC-Q200 automotive qualification. Substitute parts are identified when equivalent electrical characteristics and mechanical compatibility are maintained across the specified parameter set.

Substiute Parts

F971D335MBA

KYOCERA AVXIn Stock: 2889F971D335MBA Datasheet

Current PartRFQ

T491B335M020AT

KEMETIn Stock: 54638T491B335M020AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F971D335MBA is determined by strict equivalence across the following parameters:

• Capacitance value: 3.3 µF (exact match required)
• Voltage rating: 20 V (exact match required)
• Tolerance: ±20% (exact match required)
• Package / Case: 1411 (3528 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match or better required)
• Type: Molded tantalum (exact match required)
• RoHS Status: ROHS3 Compliant (compliance required)

The substitute part T491B335M020AT meets all substitution criteria. Both components share identical electrical ratings, mechanical dimensions, and compliance certifications, enabling direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the F971D335MBA and T491B335M020AT are Active product status components with full RoHS3 compliance and equivalent electrical specifications. The F971D335MBA carries AEC-Q200 automotive qualification and high reliability ratings. The T491B335M020AT provides superior moisture sensitivity performance (MSL 1 versus MSL 3) and marginally lower ESR (3.0 Ohm versus 3.1 Ohm), with a reduced seated height of 0.083" compared to 0.091". Selection between these parts should be based on application-specific requirements for moisture exposure, thermal cycling, and board space constraints. Both components are suitable for direct substitution in equivalent circuit applications.

Frequently Asked Questions (FAQ)

Q: Can T491B335M020AT replace F971D335MBA in automotive applications? A: Both parts are rated for -55°C to 125°C operation and maintain RoHS3 compliance. The F971D335MBA carries explicit AEC-Q200 automotive qualification. Substitution is electrically valid; however, application-specific automotive qualification requirements should be verified with your design authority.

Q: What is the significance of the different MSL ratings? A: F971D335MBA has MSL 3 (168 hours maximum floor life), while T491B335M020AT has MSL 1 (unlimited floor life). MSL 1 provides greater tolerance for storage and handling in humid environments without requiring baking before reflow soldering.

Q: Are the physical dimensions compatible for PCB layout? A: Both parts use the 1411 (3528 Metric) package with identical footprint dimensions of 0.138" L x 0.110" W (4.60mm x 2.80mm). The T491B335M020AT has a lower seated height (0.083" versus 0.091"), which may provide additional clearance in space-constrained designs.

Q: Do both parts meet the same electrical specifications? A: Yes. Both components are rated at 3.3 µF, ±20% tolerance, 20 V, with operating temperature range of -55°C to 125°C. ESR values are nearly equivalent (3.1 Ohm versus 3.0 Ohm), with negligible functional difference in typical circuit applications.

Q: What packaging formats are available for these parts? A: Both F971D335MBA and T491B335M020AT are supplied in Tape & Reel (TR) packaging for automated assembly processes.