T491D227M006AS Equivalent & Substitute Parts

Part Overview

The T491D227M006AS is a 220 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, indicating discontinued production and limited availability through standard distribution channels. The identification of equivalent substitute parts is necessary to maintain design continuity and ensure procurement of functionally compatible alternatives for new production runs or field replacements.

Substiute Parts

T491D227M006AS

KEMETIn Stock: 811T491D227M006AS Datasheet

Current PartRFQ

293D227X06R3D2TE3

Vishay SpragueIn Stock: 2043293D227X06R3D2TE3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T491D227M006AS is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Parameters:

• Capacitance value: 220 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Voltage rating: 6.3 V (exact match required)
• Operating temperature range: -55°C ~ 125°C (exact match required)

Mechanical Parameters:

• Package type: 2917 (7343 Metric) surface mount (exact match required)
• Physical dimensions: 0.287" L x 0.169" W, 0.122" max height (exact match required)
• Mounting type: Surface mount (exact match required)

Environmental Parameters:

• Moisture sensitivity level: 1 (Unlimited) (exact match required)

The substitute part 293D227X06R3D2TE3 meets all specified electrical and mechanical parameters. Variations in ESR (Equivalent Series Resistance) and product status do not disqualify substitution when all primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

The 293D227X06R3D2TE3 manufactured by Vishay Sprague is a direct functional equivalent to the obsolete T491D227M006AS. Selection of this substitute is supported by the following factors:

Product Availability: The substitute part is in active production status with confirmed inventory availability (1983 pieces), whereas the original part is obsolete with limited stock.

Regulatory Compliance: The substitute part is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The original part is RoHS non-compliant.

Electrical Performance: All critical electrical parameters are identical. The substitute exhibits lower ESR (600 mOhm versus 700 mOhm), which represents an improvement in performance characteristics without introducing incompatibility.

Mechanical Compatibility: Physical dimensions, package type, and mounting configuration are identical, ensuring direct PCB footprint compatibility without layout modifications.

Environmental Specifications: Both parts share identical moisture sensitivity levels and operating temperature ranges, confirming thermal and environmental equivalence.

Frequently Asked Questions (FAQ)

Q: Can the 293D227X06R3D2TE3 be used as a direct replacement for the T491D227M006AS on existing PCBs?

A: Yes. The substitute part is mechanically and electrically equivalent. Identical package dimensions (2917/7343 Metric), footprint, and electrical specifications ensure direct PCB compatibility without layout or design modifications.

Q: What is the significance of the lower ESR in the substitute part?

A: The substitute part exhibits 600 mOhm ESR compared to 700 mOhm in the original. Lower ESR reduces impedance and heat generation, representing an improvement in performance. This does not create incompatibility; circuits designed for the original part will function with improved characteristics.

Q: Are there any compliance differences between the two parts?

A: Yes. The substitute part (293D227X06R3D2TE3) is ROHS3 compliant, while the original (T491D227M006AS) is RoHS non-compliant. For applications requiring RoHS compliance, the substitute is the appropriate selection.

Q: Do both parts have the same moisture sensitivity requirements?

A: Yes. Both parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply equally to both components.

Q: Is the operating temperature range identical?

A: Yes. Both parts operate across the identical temperature range of -55°C to 125°C, ensuring thermal equivalence across all application environments.

Q: What is the packaging difference between the two parts?

A: The original part is supplied in standard packaging. The substitute is available in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility in procurement quantities and handling methods.