KEMET T496X476M020AS Equivalent & Substitute Parts

Part Overview

The KEMET T496X476M020AS is a 47 µF molded tantalum capacitor rated at 20 V with ±20% tolerance, housed in a 2917 (7343 Metric) surface mount package. This component features a fail-safe design with built-in fuse protection and operates across the temperature range of -55°C to 125°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

T496X476M020AS

KEMETIn Stock: 1097T496X476M020AS Datasheet

Current PartRFQ

T496X476M020AT

KEMETIn Stock: 720T496X476M020AT Datasheet

DirectRFQ

T496X476K020AT

KEMETIn Stock: 1250T496X476K020AT Datasheet

Parametric EquivalentRFQ

T496X476K020ATE300

KEMETIn Stock: 3595T496X476K020ATE300 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T496X476M020AS is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Capacitance: 47 µF (exact match required)
• Voltage Rating: 20 V (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 (exact match required)
• Type: Molded Tantalum (exact match required)

Allowable Variations:

• Tolerance: The original part specifies ±20%. Substitute parts with ±10% tolerance are acceptable as they represent tighter specification and maintain compatibility with circuit requirements.
• ESR (Equivalent Series Resistance): The original part does not specify ESR. Substitute parts with 300 mOhm ESR are acceptable as this parameter does not degrade performance in applications designed for the original part.
• Packaging Format: The original part is supplied as cut tape. Substitute parts supplied in Tape & Reel (TR) format are acceptable for equivalent electrical performance.
• Product Status: Active alternatives are preferred over obsolete status for supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: T496X476K020ATE300

The T496X476K020ATE300 is the preferred substitute for the obsolete T496X476M020AS. This part maintains all critical electrical and mechanical parameters while offering the following advantages:

• Active product status ensures long-term supply chain availability
• ±10% tolerance provides tighter capacitance specification than the original ±20%
• Specified ESR of 300 mOhm enables precise circuit performance prediction
• Defined lifetime rating of 2000 Hrs @ 85°C provides reliability documentation
• Tape & Reel packaging format supports automated assembly processes
• Highest inventory availability (3500 Pcs) among active alternatives
• Full ROHS3 compliance and REACH unaffected status maintained

Secondary Recommendation: T496X476K020AT

The T496X476K020AT provides equivalent electrical performance with identical specifications to the primary recommendation, differentiated only by packaging format. This part is suitable when Tape & Reel packaging without the extended ESR specification suffix is acceptable.

Tertiary Recommendation: T496X476M020AT

The T496X476M020AT maintains the original ±20% tolerance specification while transitioning to active product status. This part is suitable for applications where tolerance specification matching is a primary requirement.

Frequently Asked Questions (FAQ)

Q: Can the T496X476K020ATE300 directly replace the T496X476M020AS without circuit modification?

A: Yes. The T496X476K020ATE300 maintains all critical electrical parameters: 47 µF capacitance, 20 V voltage rating, -55°C to 125°C operating range, and identical 2917 (7343 Metric) package dimensions. The tighter ±10% tolerance and specified ESR do not require circuit modification and are compatible with designs specified for the original part.

Q: What is the difference between T496X476M020AT and T496X476K020AT?

A: The primary difference is tolerance specification. T496X476M020AT maintains ±20% tolerance matching the original part, while T496X476K020AT specifies ±10% tolerance. Both parts share identical voltage rating, capacitance, package, and operating temperature range. Selection depends on circuit tolerance requirements.

Q: Why is ESR specification important for these tantalum capacitors?

A: ESR (Equivalent Series Resistance) affects circuit performance in high-frequency applications and ripple current handling. The substitute parts specify 300 mOhm ESR, enabling precise circuit analysis. The original part does not specify ESR, so the substitute specification does not degrade performance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed—T496X476M020AT, T496X476K020AT, and T496X476K020ATE300—are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance with the original part.

Q: What is the significance of Moisture Sensitivity Level 1?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life without moisture bake-out requirements. All parts in this comparison maintain MSL 1 rating, ensuring identical handling and storage procedures.

Q: Can I use these parts interchangeably in production?

A: Yes, within the constraints of your circuit tolerance requirements. For applications requiring ±20% tolerance matching, use T496X476M020AT. For applications accepting ±10% tolerance, use T496X476K020AT or T496X476K020ATE300. All three parts are mechanically and electrically compatible with the original design.

Q: What is the difference between cut tape and Tape & Reel packaging?

A: Cut tape is supplied in individual strips, while Tape & Reel (TR) is supplied on continuous reels for automated assembly. Both formats contain identical components. Tape & Reel format is preferred for high-volume production due to automated handling efficiency.