T491D337M010AS Equivalent & Substitute Parts

Part Overview

The T491D337M010AS is a 330 µF molded tantalum capacitor manufactured by KEMET, rated for 10 V operation in a 2917 (7343 Metric) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The part operates across a temperature range of -55°C to 125°C with a 500 mOhm equivalent series resistance (ESR) and ±20% capacitance tolerance.

Substiute Parts

T491D337M010AS

KEMETIn Stock: 844T491D337M010AS Datasheet

Current PartRFQ

T491D337M010AT

KEMETIn Stock: 2052T491D337M010AT Datasheet

DirectRFQ

TAJE337M010H

KYOCERA AVXIn Stock: 1134TAJE337M010H Datasheet

SimilarRFQ

TPSD337M010H0100

KYOCERA AVXIn Stock: 1054TPSD337M010H0100 Datasheet

SimilarRFQ

TPSD337M010H0150

KYOCERA AVXIn Stock: 1152TPSD337M010H0150 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T491D337M010AS is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Capacitance: 330 µF (exact match required)
• Voltage Rating: 10 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 Consideration Parameters:

• ESR (Equivalent Series Resistance): Variations permitted within application-specific limits
• Manufacturer Size Code: May vary between manufacturers
• Product Status: Active status preferred for long-term availability

Substitute parts are grouped into two categories: direct equivalents from the same manufacturer (KEMET) and cross-manufacturer alternatives (KYOCERA AVX). All listed substitutes maintain identical electrical specifications for capacitance, voltage, tolerance, and temperature range. ESR values vary across the substitute group, ranging from 100 mOhm to 900 mOhm, reflecting different design approaches while maintaining functional compatibility within the 2917 package footprint.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

The T491D337M010AT from KEMET is the direct equivalent replacement for the obsolete T491D337M010AS. Both parts share identical electrical specifications, physical dimensions, and ESR characteristics. The T491D337M010AT maintains active product status and achieves ROHS3 compliance, providing superior long-term procurement availability and regulatory alignment compared to the original obsolete part.

Cross-Manufacturer Alternatives:

KYOCERA AVX supplies three active alternatives within the TPS and TAJ series. These parts maintain all critical electrical parameters (capacitance, voltage, tolerance, temperature range) and package compatibility:

• TPSD337M010H0100: Lowest ESR option at 100 mOhm, suitable for applications requiring minimal impedance.
• TPSD337M010H0150: Mid-range ESR at 150 mOhm, balancing performance and general-purpose requirements.
• TAJE337M010H: Higher ESR at 900 mOhm, functionally equivalent for applications where ESR is not a limiting factor.

All substitute parts are available in active production status, ensuring supply chain continuity. Selection between alternatives depends on application-specific ESR requirements and compliance mandates.

Frequently Asked Questions (FAQ)

Q: Can T491D337M010AT directly replace T491D337M010AS without circuit modification?

A: Yes. The T491D337M010AT is a direct equivalent with identical capacitance (330 µF), voltage rating (10 V), tolerance (±20%), ESR (500 mOhm), package (2917), and operating temperature range (-55°C to 125°C). No circuit modifications are required.

Q: What is the primary advantage of switching from T491D337M010AS to T491D337M010AT?

A: The T491D337M010AT is in active production status with ROHS3 compliance, whereas the original part is obsolete and non-compliant. This ensures long-term availability and regulatory alignment for new designs and production runs.

Q: Are KYOCERA AVX parts (TPSD and TAJE series) compatible with the original KEMET design?

A: Yes, all KYOCERA AVX alternatives maintain the same capacitance, voltage rating, tolerance, package footprint, and operating temperature range. Physical dimensions and mounting characteristics are identical. ESR values differ across the KYOCERA AVX lineup, requiring verification that the application tolerates the specified ESR for each part.

Q: How do ESR differences affect part selection among the substitute options?

A: ESR (Equivalent Series Resistance) impacts impedance characteristics and thermal performance. The T491D337M010AT and original part specify 500 mOhm ESR. KYOCERA AVX alternatives range from 100 mOhm to 900 mOhm. Applications sensitive to impedance or thermal dissipation must verify ESR compatibility. Lower ESR (100-150 mOhm) reduces impedance; higher ESR (900 mOhm) increases it.

Q: What packaging formats are available for these substitutes?

A: T491D337M010AT is supplied in Cut Tape (CT) and Digi-Reel® formats. KYOCERA AVX parts (TPSD series) are supplied in Tape & Reel (TR) format. Verify packaging compatibility with assembly equipment and procurement workflows.

Q: Are all substitute parts RoHS compliant?

A: T491D337M010AT achieves ROHS3 compliance. KYOCERA AVX alternatives (TAJE337M010H, TPSD337M010H0100, TPSD337M010H0150) are RoHS non-compliant. Regulatory requirements determine whether compliance status influences part selection.

Q: Do all substitutes share the same moisture sensitivity level?

A: Yes. All listed parts, including the original T491D337M010AS and all substitutes, are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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

A: Yes, all substitute parts maintain identical 2917 (7343 Metric) package dimensions and surface mount footprints. PCB layouts require no modification. Verify ESR specifications against circuit performance requirements before final selection.