T491B106M010AS Equivalent & Substitute Parts

Part Overview

The T491B106M010AS is a 10 µF molded tantalum capacitor manufactured by KEMET, rated for 10 V operation in a 1411 (3528 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 moisture sensitivity level of 1 (unlimited) and is RoHS non-compliant.

Substiute Parts

T491B106M010AS

KEMETIn Stock: 2902T491B106M010AS Datasheet

Current PartRFQ

T491B106M010AT

KEMETIn Stock: 1914T491B106M010AT Datasheet

DirectRFQ

TAJB106M010RNJ

KYOCERA AVXIn Stock: 785343TAJB106M010RNJ Datasheet

DirectRFQ

293D106X0010B2TE3

Vishay SpragueIn Stock: 2168293D106X0010B2TE3 Datasheet

SimilarRFQ

TAJB106M010H

KYOCERA AVXIn Stock: 1072TAJB106M010H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T491B106M010AS is determined by strict equivalence across the following critical parameters: capacitance value (10 µF), voltage rating (10 V), tolerance (±20%), package type (1411/3528 Metric), mounting configuration (surface mount), and operating temperature range (-55°C to 125°C). All substitute parts must maintain these electrical and mechanical specifications to ensure functional compatibility within the original circuit design.

The ESR (Equivalent Series Resistance) parameter is secondary to the primary electrical specifications but is documented for reference. Substitute parts may exhibit lower ESR values (2.5 Ohm versus 3.5 Ohm) while maintaining all primary electrical and mechanical compatibility criteria. Compliance certifications (RoHS, REACH) and product status (active versus obsolete) are documented to support procurement and regulatory requirements but do not disqualify functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

T491B106M010AT (KEMET) is the primary direct equivalent, maintaining identical electrical specifications and ESR characteristics to the original T491B106M010AS. This part is manufactured by the same supplier and carries active product status with ROHS3 compliance. The T491B106M010AT is suitable for applications requiring exact electrical performance matching and is available in Cut Tape and Digi-Reel packaging formats.

TAJB106M010RNJ (KYOCERA AVX) and 293D106X0010B2TE3 (Vishay Sprague) are functionally equivalent alternatives with reduced ESR values (2.5 Ohm versus 3.5 Ohm). Both parts maintain all primary electrical and mechanical specifications and carry active product status with ROHS3 compliance. These alternatives are suitable for applications where lower ESR characteristics provide operational benefits. TAJB106M010RNJ is available in Cut Tape and Digi-Reel packaging; 293D106X0010B2TE3 is supplied in Tape & Reel format.

TAJB106M010H (KYOCERA AVX) is functionally equivalent with reduced ESR (2.5 Ohm) and active product status. This part does not carry ROHS3 compliance, maintaining RoHS non-compliant status similar to the original component. Selection of this part is appropriate for applications without RoHS compliance requirements.

For new designs and procurement requiring regulatory compliance, T491B106M010AT, TAJB106M010RNJ, or 293D106X0010B2TE3 are recommended. For legacy applications or systems without RoHS requirements, TAJB106M010H provides functional equivalence with active availability.

Frequently Asked Questions (FAQ)

Q: Can T491B106M010AT be used as a direct replacement for T491B106M010AS?

A: Yes. T491B106M010AT is a direct equivalent manufactured by KEMET with identical capacitance (10 µF), voltage rating (10 V), tolerance (±20%), ESR (3.5 Ohm), package type (1411/3528 Metric), and operating temperature range (-55°C to 125°C). The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 versus non-compliant).

Q: What is the significance of the ESR difference between the main part and substitute parts?

A: The T491B106M010AS and T491B106M010AT both specify 3.5 Ohm ESR. The TAJB106M010RNJ, 293D106X0010B2TE3, and TAJB106M010H specify 2.5 Ohm ESR. Lower ESR values reduce heat dissipation and improve high-frequency performance characteristics. Both ESR values are within acceptable ranges for the specified electrical parameters and do not disqualify functional equivalence.

Q: Are all substitute parts compatible with the original PCB layout?

A: Yes. All substitute parts maintain the 1411 (3528 Metric) package specification with dimensions of 0.138" L x 0.110" W (3.50mm x 2.80mm) and maximum seated height of 0.083" (2.10mm to 2.11mm). PCB footprints designed for the T491B106M010AS accommodate all listed substitute parts without modification.

Q: What is the difference between Cut Tape, Digi-Reel, and Tape & Reel packaging?

A: Packaging format affects procurement and assembly processes but does not alter electrical or mechanical specifications. Cut Tape (CT) and Digi-Reel formats are suitable for automated pick-and-place assembly. Tape & Reel (TR) format is standard for high-volume production environments. Component selection should account for manufacturing process requirements.

Q: Why is RoHS compliance status documented for substitute parts?

A: RoHS (Restriction of Hazardous Substances) compliance is a regulatory requirement in many markets and applications. The original T491B106M010AS is RoHS non-compliant. Substitute parts T491B106M010AT, TAJB106M010RNJ, and 293D106X0010B2TE3 carry ROHS3 compliance, supporting applications with regulatory requirements. TAJB106M010H maintains RoHS non-compliant status.

Q: Can substitute parts with different manufacturers be mixed in the same production batch?

A: All substitute parts meet identical electrical and mechanical specifications. Mixing manufacturers within a single production batch is permissible from a functional standpoint. However, procurement and quality assurance processes should account for supplier-specific documentation, certifications, and traceability requirements.

Q: What is Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture exposure controls. All listed parts, including the main component and substitutes, carry MSL 1 classification, eliminating moisture sensitivity as a selection criterion.