T494D686K010AS Equivalent & Substitute Parts Reference

Part Overview

The T494D686K010AS is a 68 µF molded tantalum capacitor manufactured by KEMET, rated for 10 V operation in a 2917 (7343 Metric) surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part features a 200 mOhm equivalent series resistance (ESR) and operates across the industrial temperature range of -55°C to 125°C with a 2000-hour lifetime rating at 125°C.

Substiute Parts

T494D686K010AS

KEMETIn Stock: 673T494D686K010AS Datasheet

Current PartRFQ

TPSD686K020R0300

KYOCERA AVXIn Stock: 2026TPSD686K020R0300 Datasheet

SimilarRFQ

TR3D686K010C0070

Vishay SpragueIn Stock: 1000TR3D686K010C0070 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T494D686K010AS is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Capacitance value: 68 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Package / Case: 2917 (7343 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -55°C to 125°C minimum (exact match or wider range acceptable)

Secondary Compatibility Factors:

• Voltage Rating: Equal to or greater than 10 V (higher ratings provide design margin)
• ESR: Lower values improve performance; higher values acceptable if circuit design permits
• Type: Molded Tantalum (category match required)

The two substitute parts identified below satisfy all primary criteria and represent active alternatives to the obsolete T494D686K010AS.

Parameter Comparison

Engineering Selection Recommendations

TR3D686K010C0070 (Vishay Sprague TANTAMOUNT™ Series)

This substitute provides direct electrical equivalence to the T494D686K010AS with identical voltage and capacitance ratings. The 70 mOhm ESR represents a 65% reduction compared to the main part, resulting in lower impedance and improved transient response characteristics. The part carries ROHS3 compliance and active product status, ensuring long-term availability and supply chain stability. The Tape & Reel packaging format supports automated assembly processes.

TPSD686K020R0300 (KYOCERA AVX TPS Series)

This substitute maintains identical capacitance and tolerance specifications while providing a 20 V voltage rating, representing a 2× design margin over the 10 V requirement. The higher voltage rating accommodates applications with transient overvoltage conditions or future design revisions requiring increased voltage headroom. The 300 mOhm ESR is 50% higher than the main part; circuit analysis is required to confirm acceptability in applications sensitive to impedance characteristics. ROHS3 compliance and active status ensure procurement continuity. Tape & Reel packaging supports production automation.

Both substitutes are electrically compatible within the specified parameter envelope and represent active alternatives to the obsolete T494D686K010AS.

Frequently Asked Questions (FAQ)

Q: Can the TR3D686K010C0070 be used as a direct replacement for the T494D686K010AS?

A: Yes. Both parts share identical capacitance (68 µF), voltage rating (10 V), tolerance (±10%), package (2917), and operating temperature range (-55°C to 125°C). The lower ESR of the TR3D686K010C0070 (70 mOhm versus 200 mOhm) represents an improvement in electrical performance with no compatibility issues.

Q: What is the advantage of the TPSD686K020R0300 over the TR3D686K010C0070?

A: The TPSD686K020R0300 provides a 20 V voltage rating compared to 10 V, offering increased design margin for applications subject to voltage transients or future specification changes. The trade-off is a higher ESR (300 mOhm). Selection depends on circuit requirements for voltage headroom versus impedance sensitivity.

Q: Are both substitute parts available in the same packaging format as the original?

A: The T494D686K010AS is supplied in bulk packaging. Both substitutes are supplied in Tape & Reel (TR) format, which is standard for automated assembly. Tape & Reel packaging is compatible with pick-and-place equipment and does not affect electrical performance.

Q: What does the ESR difference mean for circuit performance?

A: ESR (Equivalent Series Resistance) affects impedance at high frequencies and transient response. The TR3D686K010C0070 with 70 mOhm ESR provides lower impedance than the original 200 mOhm part, improving performance in noise-sensitive applications. The TPSD686K020R0300 with 300 mOhm ESR has higher impedance; acceptability depends on circuit filtering requirements and ripple current specifications.

Q: Are both substitutes RoHS compliant?

A: Yes. Both the TR3D686K010C0070 and TPSD686K020R0300 carry ROHS3 compliance certification. The original T494D686K010AS is RoHS non-compliant, making the substitutes necessary for applications requiring regulatory compliance.

Q: Can I use the TPSD686K020R0300 in a circuit designed for 10 V operation?

A: Yes. A 20 V rated capacitor operates safely in a 10 V circuit. The higher voltage rating provides design margin and does not degrade performance. This configuration is standard engineering practice for reliability enhancement.

Q: What is the difference between the Vishay and KYOCERA AVX product series?

A: Both manufacturers produce molded tantalum capacitors meeting the same electrical and mechanical specifications for this application. Selection between TR3D686K010C0070 and TPSD686K020R0300 is based on voltage requirement, ESR tolerance, and supply chain availability rather than fundamental performance differences.