T494D477M006AS Equivalent & Substitute Parts

Part Overview

The T494D477M006AS is a 470 µF molded tantalum capacitor manufactured by KEMET, rated for 6.3 V operation in a 2917 (7343 Metric) surface mount package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 125°C with a rated lifetime of 2000 hours at 125°C and features a 150 mOhm equivalent series resistance (ESR).

Substiute Parts

T494D477M006AS

KEMETIn Stock: 1115T494D477M006AS Datasheet

Current PartRFQ

T494D477M006AT

KEMETIn Stock: 3086T494D477M006AT Datasheet

DirectRFQ

TR3E477M6R3C0060

Vishay SpragueIn Stock: 1092TR3E477M6R3C0060 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T494D477M006AS is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 470 µF (exact match required)
• Voltage Rating: 6.3 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)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Substitute parts identified in this reference maintain all critical electrical and mechanical parameters. Variations in ESR, product status, packaging format (bulk versus tape & reel), and RoHS compliance status are noted but do not preclude functional substitution when application requirements permit.

Parameter Comparison

Engineering Selection Recommendations

T494D477M006AT (KEMET) is the primary direct substitute for the obsolete T494D477M006AS. Both parts are manufactured by KEMET and maintain identical electrical specifications, including 150 mOhm ESR. The T494D477M006AT is currently in active production status and is ROHS3 compliant, addressing regulatory requirements that the original part does not meet. The primary difference is packaging format: T494D477M006AT is supplied in Tape & Reel format, which is standard for automated assembly processes.

TR3E477M6R3C0060 (Vishay Sprague) is a cross-manufacturer substitute that maintains all critical electrical and mechanical parameters. This part is manufactured by Vishay Sprague under the TANTAMOUNT™ TR3 series and is ROHS3 compliant. The TR3E477M6R3C0060 features a lower ESR of 60 mOhm compared to the 150 mOhm specification of the main part. This lower ESR may provide improved performance in applications sensitive to impedance characteristics. The seated height of the TR3E477M6R3C0060 is 0.170" (4.32 mm) compared to 0.122" (3.10 mm) for the main part, which requires verification against PCB layout constraints.

Selection between these substitutes should be based on supply chain availability, compliance requirements, and application-specific ESR and height tolerances.

Frequently Asked Questions (FAQ)

Q: Can T494D477M006AT be used as a direct replacement for T494D477M006AS?

A: Yes. Both parts share identical electrical specifications: 470 µF capacitance, 6.3 V rating, ±20% tolerance, 150 mOhm ESR, and 2917 (7343 Metric) package. The primary difference is packaging format (bulk versus Tape & Reel) and product status (obsolete versus active). T494D477M006AT is the recommended substitute for new designs and procurement.

Q: What is the significance of the ESR difference between T494D477M006AS and TR3E477M6R3C0060?

A: The TR3E477M6R3C0060 features 60 mOhm ESR compared to 150 mOhm for the main part. Lower ESR reduces impedance and heat generation in high-frequency or high-ripple-current applications. Applications with strict ESR requirements must evaluate whether the lower ESR of the Vishay part is compatible with circuit design parameters.

Q: Are there physical dimension differences between these substitutes?

A: The TR3E477M6R3C0060 has a maximum seated height of 0.170" (4.32 mm), while both KEMET parts specify 0.122" (3.10 mm). This 0.048" (1.22 mm) height difference must be verified against PCB layout and component clearance requirements before substitution.

Q: What is the impact of RoHS compliance status on part selection?

A: The original T494D477M006AS is RoHS non-compliant, while both T494D477M006AT and TR3E477M6R3C0060 are ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the compliant substitutes are mandatory. For legacy systems without regulatory constraints, either part is functionally acceptable.

Q: Can these parts be used interchangeably in automated assembly?

A: T494D477M006AT and TR3E477M6R3C0060 are both supplied in Tape & Reel format and are compatible with standard surface mount assembly equipment. The original T494D477M006AS is supplied in bulk format and requires different handling during assembly. Tape & Reel format is standard for high-volume automated production.

Q: What is Moisture Sensitivity Level (MSL) 1, and does it affect handling?

A: MSL 1 indicates unlimited shelf life and no special moisture control requirements during storage or handling. All three parts in this reference share MSL 1 classification, eliminating moisture-related handling differences between substitutes.