F971D684MAAHT3 Equivalent & Substitute Parts

Part Overview

The F971D684MAAHT3 is a 0.68 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 20 V operation in a 1206 (3216 Metric) surface mount package. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing production and maintenance applications. The part features automotive-grade reliability with AEC-Q200 certification and operates across an extended temperature range of -55°C to 135°C.

Substiute Parts

F971D684MAAHT3

KYOCERA AVXIn Stock: 1263F971D684MAAHT3 Datasheet

Current PartRFQ

T491A684M020AT

KEMETIn Stock: 2782T491A684M020AT Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the F971D684MAAHT3 is determined by strict equivalence across the following critical parameters:

• Capacitance value: 0.68 µF (exact match required)
• Tolerance: ±20% (matching tolerance band)
• Voltage rating: 20 V (minimum acceptable rating)
• Package type: 1206 (3216 Metric) surface mount (physical and electrical compatibility)
• Component type: Molded tantalum capacitor (material and construction consistency)
• Physical dimensions and height constraints (PCB layout compatibility)
• RoHS3 compliance (regulatory requirement)

The T491A684M020AT from KEMET meets all substitution criteria within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

The T491A684M020AT serves as a direct functional substitute for the F971D684MAAHT3 based on electrical and mechanical parameter equivalence. Both components satisfy the core substitution criteria: identical capacitance, tolerance, voltage rating, package type, and physical dimensions.

The T491A684M020AT is currently in active production status, ensuring long-term availability and supply chain continuity. Both parts maintain ROHS3 compliance, meeting regulatory requirements for current manufacturing standards.

The substitute part exhibits a higher ESR value (12 Ohm versus 7.6 Ohm) and operates within a slightly reduced maximum temperature range (-55°C to 125°C versus -55°C to 135°C). These differences fall within acceptable operational margins for general-purpose tantalum capacitor applications and do not preclude substitution in standard circuit implementations.

Frequently Asked Questions (FAQ)

Q: Can the T491A684M020AT replace the F971D684MAAHT3 in existing designs?

A: Yes. Both components share identical electrical specifications (0.68 µF, ±20%, 20 V) and physical dimensions (1206 package, 3.20mm x 1.60mm). The substitute part is pin-compatible and footprint-compatible with no PCB modifications required.

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

A: The F971D684MAAHT3 has an ESR of 7.6 Ohm, while the T491A684M020AT has an ESR of 12 Ohm. This difference reflects manufacturing variations between manufacturers but does not affect substitution validity for standard filtering and decoupling applications. Circuit-specific requirements should be evaluated if ESR is a critical design parameter.

Q: Does the operating temperature range difference affect substitution?

A: The F971D684MAAHT3 operates to 135°C, while the T491A684M020AT operates to 125°C. For applications operating below 125°C, the substitute part is fully compatible. Applications requiring operation above 125°C should retain the original part or evaluate alternative solutions.

Q: Are both parts suitable for automotive applications?

A: The F971D684MAAHT3 carries AEC-Q200 automotive certification. The T491A684M020AT is classified as general-purpose. Automotive-specific applications should verify that the substitute part meets required automotive qualification standards for the intended application.

Q: What packaging options are available for the T491A684M020AT?

A: The T491A684M020AT is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. Verify packaging compatibility with your procurement and assembly requirements.