T491A476M006AS Equivalent & Substitute Parts

Part Overview

The T491A476M006AS is a 47 µF molded tantalum capacitor manufactured by KEMET, rated for 6.3 V operation in a 1206 (3216 Metric) surface mount package. This component is classified as obsolete, indicating discontinuation from active production. The identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair requirements for systems utilizing this capacitor specification.

Substiute Parts

T491A476M006AS

KEMETIn Stock: 2145T491A476M006AS Datasheet

Current PartRFQ

T491A476M006AT

KEMETIn Stock: 2971T491A476M006AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T491A476M006AS is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 47 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Voltage rating: 6.3 V (exact match required)
• ESR: 3.5 Ohm (exact match required)
• Operating temperature range: -55°C ~ 125°C (exact match required)

Mechanical Parameters:

• Package type: 1206 (3216 Metric) surface mount (exact match required)
• Physical dimensions: 0.126" L x 0.063" W, height 0.071" max (exact match required)
• Manufacturer size code: A (exact match required)

Material & Environmental:

• Component type: Molded tantalum (exact match required)
• Moisture sensitivity: MSL 1 (exact match required)

The substitute part T491A476M006AT meets all electrical, mechanical, and environmental specifications identical to the main part. The primary distinction is product status and compliance certification, not functional or physical characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: T491A476M006AT

The T491A476M006AT is the direct substitute for the obsolete T491A476M006AS. Selection of the active part is based on the following engineering criteria:

1. Product Status: T491A476M006AT maintains active production status, ensuring long-term supply chain availability and consistent manufacturing quality control.

2. Regulatory Compliance: T491A476M006AT is ROHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution. The main part (T491A476M006AS) is RoHS non-compliant and does not meet modern regulatory standards.

3. Functional Equivalence: All electrical parameters (capacitance, voltage rating, ESR, temperature range) and mechanical specifications (package, dimensions, mounting type) are identical between the two parts.

4. Reliability Data: T491A476M006AT includes specified lifetime rating of 2000 hours at 125°C, providing documented reliability performance for design validation.

5. Packaging Availability: T491A476M006AT is available in Cut Tape (CT) and Digi-Reel® packaging formats, supporting both prototype and production-volume procurement workflows.

The T491A476M006AT is the appropriate selection for new designs, production restocking, and replacement applications where regulatory compliance and supply continuity are required.

Frequently Asked Questions (FAQ)

Q: Can T491A476M006AT be used as a direct replacement for T491A476M006AS in existing designs?

A: Yes. The T491A476M006AT is electrically and mechanically identical to the T491A476M006AS. All critical parameters—capacitance (47 µF), voltage rating (6.3 V), ESR (3.5 Ohm), operating temperature range (-55°C ~ 125°C), and package dimensions (1206/3216 Metric)—are equivalent. The substitute part is suitable for direct board-level replacement without circuit modification.

Q: What is the primary difference between these two parts?

A: The main differences are product status and regulatory compliance. T491A476M006AS is obsolete and RoHS non-compliant. T491A476M006AT is in active production and ROHS3 compliant. Functionally and physically, the parts are identical.

Q: Are there any packaging differences between T491A476M006AS and T491A476M006AT?

A: The physical component dimensions and package type (1206/3216 Metric) are identical. However, T491A476M006AT is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, while the main part packaging format is not specified in available documentation. Both formats are compatible with standard surface mount assembly equipment.

Q: Does the T491A476M006AT meet current environmental regulations?

A: Yes. T491A476M006AT is ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance restrictions for electronic components in regulated markets.

Q: What is the moisture sensitivity level for these capacitors?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These components do not require special moisture control during storage, handling, or assembly.

Q: Can I use T491A476M006AT in high-temperature applications?

A: Yes. The operating temperature range is -55°C ~ 125°C for both parts. T491A476M006AT includes a specified lifetime rating of 2000 hours at 125°C, confirming reliability at maximum operating temperature.

Q: Is the ESR specification the same for both parts?

A: Yes. Both T491A476M006AS and T491A476M006AT have an ESR of 3.5 Ohm, ensuring equivalent electrical performance in circuits sensitive to series resistance characteristics.