F970J685MBA Equivalent & Substitute Parts

Part Overview

The F970J685MBA is a 6.8 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated at 6.3 V with ±20% tolerance in a 1411 (3528 Metric) surface mount package. This component is classified as obsolete, making substitute parts necessary for new designs and production continuity. The part features automotive-grade reliability with AEC-Q200 certification and operates across the temperature range of -55°C to 125°C.

Substiute Parts

F970J685MBA

KYOCERA AVXIn Stock: 731F970J685MBA Datasheet

Current PartRFQ

T491B685M006AT

KEMETIn Stock: 2977T491B685M006AT Datasheet

DirectRFQ

TH3B685K025C2400

Vishay SpragueIn Stock: 925TH3B685K025C2400 Datasheet

DirectRFQ

TH3B685K025D2400

Vishay SpragueIn Stock: 996TH3B685K025D2400 Datasheet

DirectRFQ

TH3B685M025C2400

Vishay SpragueIn Stock: 756TH3B685M025C2400 Datasheet

DirectRFQ

TH3B685M025D2400

Vishay SpragueIn Stock: 782TH3B685M025D2400 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the F970J685MBA is determined by the following critical parameters:

Primary Substitution Criteria:

• Capacitance: 6.8 µF (exact match required)
• Package / Case: 1411 (3528 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Physical Dimensions: 0.138" L x 0.110" W (exact match required)

Secondary Compatibility Parameters:

• Voltage Rating: Substitute parts must meet or exceed 6.3 V
• Tolerance: ±20% or tighter tolerance acceptable
• ESR: Values within 2.4 to 4.6 Ohm range acceptable
• Operating Temperature: -55°C to 125°C minimum required
• RoHS Compliance: ROHS3 Compliant required

The substitute parts identified maintain identical capacitance, package, and physical dimensions. Voltage ratings of 25 V provide higher margin than the original 6.3 V specification. ESR values remain within acceptable operational limits. All substitutes maintain RoHS3 compliance and automotive-grade certifications where applicable.

Parameter Comparison

Engineering Selection Recommendations

T491B685M006AT (KEMET): This substitute maintains the original 6.3 V voltage rating and ±20% tolerance specification. It is an active product with general-purpose classification. The ESR of 4.6 Ohm is slightly elevated compared to the original 2.5 Ohm but remains within acceptable operational parameters. MSL rating of 1 provides superior moisture handling compared to the original MSL 3. This part is suitable for direct replacement in applications where the original voltage and tolerance specifications are critical.

TH3B685K025C2400, TH3B685K025D2400, TH3B685M025C2400, TH3B685M025D2400 (Vishay Sprague): These four substitutes are manufactured by Vishay Sprague under the TANTAMOUNT™ series with TH3 designation. All four parts feature 25 V voltage rating, providing increased voltage margin over the original 6.3 V specification. The ±10% tolerance variants (TH3B685K025C2400 and TH3B685K025D2400) offer tighter tolerance control than the original ±20%. The ±20% tolerance variants (TH3B685M025C2400 and TH3B685M025D2400) match the original tolerance specification. All four parts carry AEC-Q200 automotive certification and feature MSL 1 rating. ESR values of 2.4 Ohm are lower than the original 2.5 Ohm, providing improved performance characteristics. Operating temperature range extends to 150°C, exceeding the original -55°C to 125°C specification. These parts are suitable for applications requiring higher voltage margin and improved reliability characteristics.

All substitute parts maintain ROHS3 compliance and are classified as active products with current manufacturing availability.

Frequently Asked Questions (FAQ)

Q: Can I use a 25 V rated substitute in place of the original 6.3 V part?

A: Yes. The 25 V rated substitutes (Vishay Sprague TH3 series) provide higher voltage margin and are electrically compatible. The circuit will operate normally as the capacitor will be derated relative to its voltage rating, which improves reliability and lifespan.

Q: What is the difference between the Vishay Sprague TH3 variants?

A: The four Vishay Sprague substitutes differ in tolerance and packaging designation. TH3B685K025C2400 and TH3B685K025D2400 feature ±10% tolerance. TH3B685M025C2400 and TH3B685M025D2400 feature ±20% tolerance matching the original specification. The "C" and "D" designations indicate different packaging configurations within the same electrical specifications.

Q: How does MSL rating affect part selection?

A: MSL (Moisture Sensitivity Level) indicates the maximum time a component can be exposed to moisture before soldering. The original F970J685MBA has MSL 3 (168 hours). All substitutes have MSL 1 (unlimited), providing superior moisture tolerance and reducing handling constraints during manufacturing and storage.

Q: Are all substitutes suitable for automotive applications?

A: The original F970J685MBA and all Vishay Sprague TH3 substitutes carry AEC-Q200 automotive certification. The KEMET T491B685M006AT is classified as general-purpose. For automotive applications requiring AEC-Q200 certification, the Vishay Sprague TH3 series is the appropriate selection.

Q: What is the significance of ESR differences between parts?

A: ESR (Equivalent Series Resistance) affects ripple current handling and thermal performance. The original 2.5 Ohm ESR, KEMET substitute 4.6 Ohm ESR, and Vishay Sprague 2.4 Ohm ESR are all within acceptable ranges for this capacitance and voltage class. Lower ESR values provide marginally better high-frequency performance.

Q: Can I mix different substitute parts in the same design?

A: All identified substitutes are electrically compatible and maintain identical physical dimensions and package specifications. However, for manufacturing consistency and supply chain management, using a single substitute part number across a design is recommended.