F971D475KBA Equivalent & Substitute Parts

Part Overview

The F971D475KBA is a 4.7 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 specifications, mechanical dimensions, and reliability ratings can be maintained across different manufacturers while preserving circuit performance and compliance requirements.

Substiute Parts

F971D475KBA

KYOCERA AVXIn Stock: 1676F971D475KBA Datasheet

Current PartRFQ

T491B475K020AT

KEMETIn Stock: 2280T491B475K020AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F971D475KBA is determined by strict equivalence across the following parameters:

• Capacitance value: 4.7 µF (exact match required)
• Voltage rating: 20 V (exact match required)
• Tolerance: ±10% (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)
• RoHS compliance: ROHS3 Compliant (exact match required)

The T491B475K020AT from KEMET satisfies all substitution criteria, maintaining identical electrical ratings and mechanical compatibility while operating within the same temperature envelope.

Parameter Comparison

Engineering Selection Recommendations

Both the F971D475KBA and T491B475K020AT are Active products with ROHS3 compliance and equivalent electrical specifications. The F971D475KBA carries AEC-Q200 automotive qualification and Automotive/High Reliability ratings. The T491B475K020AT provides General Purpose classification with a lower Moisture Sensitivity Level (MSL 1 vs. MSL 3), indicating superior moisture resistance characteristics. The ESR differential of 0.2 Ω between parts is within typical manufacturing tolerances for tantalum capacitors and does not affect circuit compatibility for standard filtering and energy storage applications. Selection between these parts should be based on specific application requirements regarding automotive qualification and moisture exposure conditions.

Frequently Asked Questions (FAQ)

Q: Can T491B475K020AT replace F971D475KBA in automotive applications? A: Both parts are Active products with ROHS3 compliance. The F971D475KBA carries explicit AEC-Q200 automotive qualification. If AEC-Q200 certification is a circuit design requirement, the F971D475KBA is the specified choice. For non-automotive applications or where automotive qualification is not mandated, T491B475K020AT is electrically and mechanically compatible.

Q: Are the physical dimensions identical between these parts? A: Both parts use the 1411 (3528 Metric) package with identical length and width (0.138" L x 0.110" W / 4.60mm x 2.80mm). The seated height differs by 0.008" (0.20mm), with T491B475K020AT being lower profile. This difference is negligible for standard PCB assembly and does not affect circuit board layout compatibility.

Q: What is the significance of the ESR difference? A: The F971D475KBA specifies 2.8 Ω ESR while T491B475K020AT specifies 3.0 Ω ESR. This 0.2 Ω difference represents approximately 7% variance and falls within normal manufacturing tolerances for molded tantalum capacitors. For filtering and energy storage applications, this difference does not impact circuit performance.

Q: Does moisture sensitivity affect part selection? A: The F971D475KBA carries MSL 3 (168 Hours) while T491B475K020AT carries MSL 1 (Unlimited). MSL rating indicates moisture absorption during storage and handling. For applications with extended storage periods or high-humidity environments, T491B475K020AT provides superior moisture resistance. For standard manufacturing environments with controlled storage, both parts are suitable.

Q: Are both parts available in Tape & Reel packaging? A: Yes, both F971D475KBA and T491B475K020AT are supplied in Tape & Reel (TR) packaging suitable for automated assembly processes.