F971D335KBA Equivalent & Substitute Parts

Part Overview

The F971D335KBA 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 stable capacitance performance across the automotive temperature range of -55°C to 125°C. The part is currently in active production status with AEC-Q200 automotive qualification and ROHS3 compliance. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and reliability ratings are maintained across alternative manufacturers.

Substiute Parts

F971D335KBA

KYOCERA AVXIn Stock: 1164F971D335KBA Datasheet

Current PartRFQ

T491B335K020AT

KEMETIn Stock: 3015T491B335K020AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F971D335KBA is determined by strict equivalence across the following parameters:

• Capacitance value: 3.3 µF
• Tolerance: ±10%
• Voltage rating: 20 V
• Package designation: 1411 (3528 Metric)
• Mounting technology: Surface Mount
• Dielectric type: Molded Tantalum
• Operating temperature range: -55°C to 125°C minimum
• RoHS compliance: ROHS3 Compliant

The substitute part T491B335K020AT from KEMET meets all these criteria and is therefore classified as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the F971D335KBA and T491B335K020AT are active production components with ROHS3 compliance and REACH unaffected status. The F971D335KBA carries AEC-Q200 automotive qualification. The T491B335K020AT provides a marginally lower ESR value (3 Ohm versus 3.1 Ohm) and reduced seated height (2.10mm versus 2.30mm), which may offer advantages in space-constrained layouts. Selection between these parts should be based on availability, lead time, and specific application requirements for ESR performance and board clearance.

Frequently Asked Questions (FAQ)

Q: Can T491B335K020AT replace F971D335KBA in automotive applications? A: Both parts meet the same electrical specifications (3.3 µF, ±10%, 20 V) and operate across -55°C to 125°C. The T491B335K020AT is ROHS3 compliant and REACH unaffected. However, the F971D335KBA carries AEC-Q200 qualification. Automotive application requirements should be verified against specific design standards.

Q: What is the difference in ESR between these parts? A: The F971D335KBA has an ESR of 3.1 Ohm, while the T491B335K020AT has an ESR of 3 Ohm. This 0.1 Ohm difference is negligible for most applications but may be relevant in high-frequency or low-impedance circuit designs.

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: F971D335KBA is 2.30mm maximum, while T491B335K020AT is 2.10mm maximum. This difference may be significant in applications with strict height constraints.

Q: What is the moisture sensitivity level difference? A: The F971D335KBA has MSL 3 (168 Hours), while the T491B335K020AT has MSL 1 (Unlimited). MSL 1 indicates superior moisture resistance and less stringent storage and handling requirements.

Q: Can these parts be used interchangeably on the same PCB? A: Yes, both parts are pin-compatible and footprint-compatible in the 1411 package. The reduced height of the T491B335K020AT may provide additional clearance in confined spaces.