Equivalent & Substitute Parts for T494D476M025AG

Part Overview

The T494D476M025AG is a 47 µF molded tantalum capacitor manufactured by KEMET, rated for 25 V with ±20% tolerance. This surface mount component in 2917 (7343 Metric) package is designed for general purpose applications requiring stable capacitance performance across the operating temperature range of -55°C to 125°C. The part is Active status and ROHS3 compliant, making it suitable for modern electronic assemblies. Equivalent and substitute parts are identified when design requirements, supply constraints, or application-specific electrical parameters necessitate alternative component selection while maintaining functional compatibility.

Substiute Parts

T494D476M025AG

KEMETIn Stock: 1127T494D476M025AG Datasheet

Current PartRFQ

T494D476M025AT

KEMETIn Stock: 2978T494D476M025AT Datasheet

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T491D476M006AT

KEMETIn Stock: 2263T491D476M006AT Datasheet

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T491D476M025AT

KEMETIn Stock: 2192T491D476M025AT Datasheet

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T495D476M025ATE120

KEMETIn Stock: 2140T495D476M025ATE120 Datasheet

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T495X476M025ATE200

KEMETIn Stock: 2962T495X476M025ATE200 Datasheet

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TAJD476M025RNJ

KYOCERA AVXIn Stock: 8537TAJD476M025RNJ Datasheet

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TPSD476M025R0250

KYOCERA AVXIn Stock: 3290TPSD476M025R0250 Datasheet

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TPSE476M025R0100

KYOCERA AVXIn Stock: 2117TPSE476M025R0100 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the T494D476M025AG are grouped based on strict electrical and mechanical compatibility criteria. All substitute candidates must satisfy the following mandatory parameters:

Primary Compatibility Criteria:

• Capacitance: 47 µF (exact match required)
• Voltage Rating: 25 V (exact match required)
• Tolerance: ±20% (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)

Secondary Compatibility Parameters (Allowable Variation):

• ESR (Equivalent Series Resistance): Variation permitted based on application requirements
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats are interchangeable for procurement purposes
• Manufacturer: KEMET or KYOCERA AVX (both manufacturers produce equivalent molded tantalum capacitors)
• Lifetime @ Temp.: Variation permitted; higher lifetime ratings provide enhanced reliability margin

Substitutes are classified into two categories:

Direct Substitutes (Identical Electrical Specifications): Parts matching all primary and secondary parameters with identical ESR and lifetime ratings.

Functional Substitutes (Equivalent Electrical Performance): Parts matching all primary parameters with variations in ESR or lifetime ratings. These substitutes maintain functional equivalence within the application's electrical requirements while offering alternative performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent Selection:

T494D476M025AT is the direct equivalent to T494D476M025AG. Both parts are manufactured by KEMET, share identical electrical specifications (47 µF, 25 V, ±20%, 200 mOhm ESR), and are rated for 2000 hours at 125°C. Selection between these two parts is determined by packaging format availability and procurement logistics. Both are ROHS3 compliant and MSL 1 rated.

Functional Equivalent Selection:

T495X476M025ATE200 provides functional equivalence with identical capacitance, voltage, tolerance, and ESR specifications. The primary difference is the reduced lifetime rating of 2000 hours at 85°C versus 125°C for the main part. This substitute is suitable for applications where the operating temperature does not consistently reach 125°C or where the thermal stress profile is lower than the main part's design envelope.

T495D476M025ATE120 offers lower ESR (120 mOhm) compared to the main part (200 mOhm), with the same lifetime rating at 85°C. This substitute is applicable in circuits requiring reduced impedance characteristics at higher frequencies or where lower voltage ripple is a design requirement.

T491D476M025AT provides functional equivalence with higher ESR (700 mOhm). This substitute is suitable for general purpose applications where ESR is not a critical parameter and cost optimization is a consideration.

Cross-Manufacturer Substitutes:

KYOCERA AVX molded tantalum capacitors TAJD476M025RNJ, TPSD476M025R0250, and TPSE476M025R0100 are functionally equivalent alternatives. All maintain the required 47 µF, 25 V, ±20% specifications in the 2917 package. ESR values range from 100 mOhm to 900 mOhm. Selection among these parts depends on specific ESR requirements and availability. All are ROHS3 compliant and MSL 1 rated.

Compliance and Certification:

All substitute parts listed are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. All parts carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no special moisture handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Can T494D476M025AT be used as a direct replacement for T494D476M025AG?

A: Yes. T494D476M025AT is a direct equivalent. Both parts are manufactured by KEMET with identical electrical specifications: 47 µF capacitance, 25 V rating, ±20% tolerance, and 200 mOhm ESR. The difference is packaging format (Tape & Reel). Both are rated for 2000 hours at 125°C and are ROHS3 compliant.

Q: What is the significance of ESR variation among substitute parts?

A: ESR (Equivalent Series Resistance) affects impedance characteristics at high frequencies and influences voltage ripple performance. The main part specifies 200 mOhm ESR. Substitutes with lower ESR (100-120 mOhm) provide reduced impedance and lower ripple; substitutes with higher ESR (700-900 mOhm) increase impedance. Selection depends on circuit requirements. For general purpose applications, ESR variation within the range provided is typically acceptable.

Q: Are KEMET and KYOCERA AVX tantalum capacitors interchangeable?

A: Yes, within the specified electrical and mechanical parameters. Both manufacturers produce molded tantalum capacitors meeting the same industry standards. TAJD476M025RNJ (KYOCERA AVX), TPSD476M025R0250, and TPSE476M025R0100 are functionally equivalent to the KEMET main part when capacitance, voltage, tolerance, and package specifications match. Verify ESR and lifetime ratings for your specific application requirements.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Both are surface mount packaging formats suitable for automated assembly. Tape & Reel (TR) is continuous reel packaging for high-volume production. Cut Tape (CT) & Digi-Reel® is pre-cut tape format for lower-volume or mixed-component assembly. Electrical specifications are identical; selection is based on assembly equipment compatibility and procurement volume requirements.

Q: Can T491D476M025AT with 700 mOhm ESR replace the 200 mOhm ESR main part?

A: T491D476M025AT is functionally equivalent for general purpose applications where ESR is not a critical design parameter. The higher ESR increases impedance and may affect high-frequency performance or voltage ripple characteristics. Verify that your circuit design tolerates the 3.5× increase in ESR before substitution.

Q: What does MSL 1 (Unlimited) moisture sensitivity mean?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. Standard warehouse conditions are acceptable. No baking or desiccant storage is required prior to assembly.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed—both KEMET and KYOCERA AVX—are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: What is the maximum operating temperature for all listed parts?

A: All parts are rated for -55°C to 125°C operating temperature range. Lifetime ratings vary: KEMET T494 and T491 series are rated 2000 hours at 125°C; KEMET T495 series are rated 2000 hours at 85°C; KYOCERA AVX lifetime ratings are not specified in the provided data.