F970J685KBA Equivalent & Substitute Parts

Part Overview

The F970J685KBA is a 6.8 µF molded tantalum capacitor rated at 6.3 V, manufactured by KYOCERA AVX in the 1411 (3528 Metric) package. This component is designed for surface mount applications requiring high reliability in automotive environments. The part is currently obsolete, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility with the original design specifications.

Substiute Parts

F970J685KBA

KYOCERA AVXIn Stock: 1191F970J685KBA Datasheet

Current PartRFQ

T491B685K006AT

KEMETIn Stock: 10026T491B685K006AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the F970J685KBA is based on strict equivalence of the following electrical and mechanical parameters:

• Capacitance value: 6.8 µF
• Tolerance: ±10%
• Rated voltage: 6.3 V
• Package type: 1411 (3528 Metric)
• Mounting configuration: Surface Mount
• Operating temperature range: -55°C ~ 125°C
• Compliance standards: ROHS3 Compliant

The T491B685K006AT from KEMET meets all these core requirements and is classified as a direct substitute. Variations in ESR (Equivalent Series Resistance), MSL rating, and product status do not preclude substitution when the primary electrical and mechanical specifications align.

Parameter Comparison

Engineering Selection Recommendations

The T491B685K006AT is a qualified substitute for the F970J685KBA based on electrical and mechanical parameter alignment. Both components are ROHS3 compliant and operate across the identical temperature range. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity.

The T491B685K006AT exhibits a higher ESR value (4.6 Ohm versus 2.5 Ohm) and a lower maximum seated height (2.10mm versus 2.30mm). These differences fall within acceptable tolerances for molded tantalum capacitor applications and do not compromise functional compatibility in standard circuit designs. The substitute part's lower MSL rating (1 versus 3) indicates superior moisture resistance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the T491B685K006AT directly replace the F970J685KBA in existing designs?

A: Yes. Both components share identical capacitance, voltage rating, tolerance, package type, and operating temperature specifications. The physical dimensions are compatible with standard 1411 (3528 Metric) footprints.

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

A: The F970J685KBA has an ESR of 2.5 Ohm while the T491B685K006AT has an ESR of 4.6 Ohm. This 1 Ohm difference is typical among molded tantalum capacitors from different manufacturers and does not affect substitution suitability for general-purpose applications.

Q: Does the height difference affect PCB layout compatibility?

A: The T491B685K006AT has a maximum seated height of 2.10mm compared to 2.30mm for the F970J685KBA. This 0.20mm reduction provides additional clearance margin and does not create compatibility issues with existing PCB designs.

Q: What does the MSL rating difference indicate?

A: The F970J685KBA carries an MSL rating of 3 (168 Hours), while the T491B685K006AT carries an MSL rating of 1 (Unlimited). The substitute part demonstrates superior moisture resistance and requires less stringent handling protocols during assembly and storage.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the F970J685KBA and T491B685K006AT are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.