KEMET T496X337M004AS Equivalent & Substitute Parts

Part Overview

The KEMET T496X337M004AS is a 330 µF molded tantalum capacitor rated for 4 V operation 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 for new designs and ongoing production requirements. Substitute parts maintain the same capacitance, voltage rating, and physical dimensions while offering improved product status and compliance certifications.

Substiute Parts

T496X337M004AS

KEMETIn Stock: 975T496X337M004AS Datasheet

Current PartRFQ

T496X337M004AT

KEMETIn Stock: 1280T496X337M004AT Datasheet

DirectRFQ

T496X337K004ATE700

KEMETIn Stock: 854T496X337K004ATE700 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T496X337M004AS is determined by strict equivalence in the following parameters:

Primary Equivalence Criteria:

• Capacitance: 330 µF (exact match required)
• Voltage Rating: 4 V (exact match required)
• Package / Case: 2917 (7343 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Type: Molded Tantalum (exact match required)

Secondary Compatibility Parameters:

• Operating Temperature Range: -55°C ~ 125°C (must meet or exceed)
• Features: Fail Safe with Built-in Fuse (maintained across all substitutes)

Allowable Variations:

• Tolerance: ±20% (main part) to ±10% (substitute) — tighter tolerance is acceptable
• ESR (Equivalent Series Resistance): Specified in active substitutes (700 mOhm) where not specified in obsolete part
• Product Status: Obsolete to Active (improvement in availability and support)
• RoHS Compliance: Non-compliant to ROHS3 Compliant (regulatory improvement)

Substitutes that maintain all primary equivalence criteria and do not degrade secondary parameters are classified as direct or parametric equivalents.

Parameter Comparison

Engineering Selection Recommendations

T496X337M004AT (Direct Substitute): This part is the primary replacement for the obsolete T496X337M004AS. It maintains identical electrical specifications (330 µF, ±20% tolerance, 4 V rating) and physical dimensions. The T496X337M004AT is active in production, ROHS3 compliant, and available in Tape & Reel packaging for automated assembly. ESR is specified at 700 mOhm with a lifetime rating of 2000 hours at 85°C. This substitute is suitable for direct board-level replacement without design modification.

T496X337K004ATE700 (Parametric Equivalent): This part offers improved tolerance specification (±10% versus ±20%) while maintaining all other critical parameters. The tighter tolerance may provide enhanced circuit performance in applications requiring greater capacitance accuracy. Like the direct substitute, it is active, ROHS3 compliant, and rated for 2000 hours at 85°C. Selection of this part is appropriate when circuit design specifications require tolerance better than ±20%.

Compliance Considerations: Both substitute parts are ROHS3 compliant, addressing regulatory requirements that the obsolete main part does not meet. Both maintain REACH Unaffected status and EAR99 export classification. Moisture Sensitivity Level remains at 1 (Unlimited) across all parts, indicating no special moisture handling requirements.

Frequently Asked Questions (FAQ)

Q: Can T496X337M004AT be used as a direct replacement for T496X337M004AS?

A: Yes. The T496X337M004AT is electrically and mechanically equivalent to the T496X337M004AS. Both parts have 330 µF capacitance, ±20% tolerance, 4 V rating, and identical 2917 (7343 Metric) package dimensions. The primary difference is product status: T496X337M004AT is active and ROHS3 compliant, whereas T496X337M004AS is obsolete and RoHS non-compliant.

Q: What is the difference between T496X337M004AT and T496X337K004ATE700?

A: The primary difference is tolerance specification. T496X337M004AT has ±20% tolerance, while T496X337K004ATE700 has ±10% tolerance. Both parts share identical capacitance (330 µF), voltage rating (4 V), package (2917), and ESR (700 mOhm). Selection between these parts depends on circuit tolerance requirements.

Q: Are the physical dimensions identical across all three parts?

A: Yes. All three parts—T496X337M004AS, T496X337M004AT, and T496X337K004ATE700—have identical dimensions: 0.287" L x 0.169" W (7.30mm x 4.30mm) with a maximum seated height of 0.169" (4.30mm). They are fully interchangeable from a board layout perspective.

Q: What packaging formats are available?

A: The obsolete T496X337M004AS is supplied in bulk packaging. Both active substitutes, T496X337M004AT and T496X337K004ATE700, are available in Tape & Reel (TR) format, which is standard for automated surface mount assembly.

Q: Do these parts require special moisture handling?

A: No. All three parts have Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no moisture sensitivity and no special storage or handling requirements.

Q: Are there any temperature rating differences?

A: No. All three parts operate across the identical temperature range of -55°C to 125°C. Both active substitutes are rated for 2000 hours at 85°C.

Q: What is the significance of the "Fail Safe with Built-in Fuse" feature?

A: This feature is maintained across all three parts. The built-in fuse provides protection against catastrophic failure modes by interrupting current flow under fault conditions, enhancing circuit reliability and safety.

Q: Are these parts RoHS compliant?

A: The obsolete T496X337M004AS is RoHS non-compliant. Both substitute parts, T496X337M004AT and T496X337K004ATE700, are ROHS3 compliant, meeting current regulatory requirements for new designs and production.