T491D475K035AS Equivalent & Substitute Parts

Part Overview

The T491D475K035AS is a 4.7 µF molded tantalum capacitor rated for 35 V operation in a 2917 (7343 Metric) surface mount package. Manufactured by KEMET, this component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts from active manufacturers is necessary to maintain design continuity and ensure ongoing component availability for production and repair applications.

Substiute Parts

T491D475K035AS

KEMETIn Stock: 1273T491D475K035AS Datasheet

Current PartRFQ

T491D475K035AT

KEMETIn Stock: 2233T491D475K035AT Datasheet

DirectRFQ

TAJD475K035H

KYOCERA AVXIn Stock: 1003TAJD475K035H Datasheet

DirectRFQ

293D475X9035D2TE3

Vishay SpragueIn Stock: 1510293D475X9035D2TE3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T491D475K035AS is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Capacitance: 4.7 µF (exact match required)
• Voltage Rating: 35 V (exact match required)
• Package / Case: 2917 (7343 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Tolerance: ±10% (exact match required)

Secondary Compatibility Parameters:

• ESR (Equivalent Series Resistance): 1.5 Ohm nominal (minor variations acceptable within 1.3 - 1.5 Ohm range)
• Physical Dimensions: 0.287" L x 0.169" W, Height 0.122" max (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

All substitute parts listed meet these criteria and are electrically and mechanically interchangeable with the original component.

Parameter Comparison

Engineering Selection Recommendations

T491D475K035AT (KEMET) is the primary direct substitute. This part maintains identical electrical and mechanical specifications to the original T491D475K035AS while offering active product status. The T491D475K035AT carries ROHS3 compliance and includes a specified lifetime rating of 2000 hours at 125°C, providing enhanced reliability documentation. This part is available in Cut Tape and Digi-Reel packaging formats.

TAJD475K035H (KYOCERA AVX) provides equivalent electrical and mechanical performance from an alternative manufacturer. All critical parameters match the original specification. This part maintains active product status and carries MSL 1 rating. RoHS compliance status differs from the primary substitute.

293D475X9035D2TE3 (Vishay Sprague) offers an alternative from a third manufacturer with active product status and ROHS3 compliance. The ESR specification is 1.3 Ohm, which is lower than the original 1.5 Ohm rating. This represents an improvement in equivalent series resistance performance. This part is supplied in Tape & Reel packaging.

Selection between these substitutes should be based on design requirements for RoHS compliance, preferred manufacturer qualification, packaging format availability, and ESR performance specifications.

Frequently Asked Questions (FAQ)

Q: Can T491D475K035AT be used as a direct replacement for T491D475K035AS?

A: Yes. The T491D475K035AT is electrically and mechanically equivalent to the T491D475K035AS. Both parts share identical capacitance (4.7 µF), voltage rating (35 V), tolerance (±10%), ESR (1.5 Ohm), operating temperature range (-55°C ~ 125°C), and package dimensions (2917 / 7343 Metric). The primary difference is product status: T491D475K035AT is active while T491D475K035AS is obsolete.

Q: What is the difference between the KEMET T491D475K035AT and the Vishay Sprague 293D475X9035D2TE3?

A: Both parts are electrically and mechanically compatible substitutes. The primary difference is ESR: the KEMET part specifies 1.5 Ohm while the Vishay part specifies 1.3 Ohm. The Vishay part offers lower equivalent series resistance. RoHS compliance differs: KEMET T491D475K035AT is ROHS3 compliant while the original T491D475K035AS is not. The Vishay part is ROHS3 compliant.

Q: Are all substitute parts available in the same packaging format?

A: No. T491D475K035AT is available in Cut Tape (CT) and Digi-Reel packaging. TAJD475K035H packaging format is not specified in available data. 293D475X9035D2TE3 is supplied in Tape & Reel (TR) format. Packaging selection should be confirmed based on assembly process requirements.

Q: Do all substitute parts meet the same moisture sensitivity requirements?

A: Yes. All substitute parts listed carry MSL 1 (Unlimited) rating, matching the original T491D475K035AS specification.

Q: What is the significance of the ESR difference in the Vishay part?

A: The Vishay Sprague 293D475X9035D2TE3 specifies 1.3 Ohm ESR compared to 1.5 Ohm for the original and other substitutes. Lower ESR indicates reduced equivalent series resistance, which can provide improved performance in applications sensitive to impedance characteristics. This represents a performance enhancement rather than a limitation.

Q: Are all substitute parts RoHS compliant?

A: No. The original T491D475K035AS and KYOCERA AVX TAJD475K035H are RoHS non-compliant. The KEMET T491D475K035AT and Vishay Sprague 293D475X9035D2TE3 are ROHS3 compliant. RoHS compliance requirements should be confirmed based on application and regulatory requirements.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, within the constraints of packaging format and RoHS compliance requirements. All substitute parts maintain identical electrical specifications (capacitance, voltage, tolerance, operating temperature) and mechanical dimensions (2917 package, 0.287" x 0.169" x 0.122" max height). Packaging format availability and RoHS compliance status should be verified against design and manufacturing requirements.