T491D227K006AS-F Equivalent & Substitute Parts

Part Overview

The T491D227K006AS-F is a 220 µF molded tantalum capacitor rated at 6 V, manufactured by Cornell Dubilier Electronics (CDE) in the 2917 (7343 Metric) package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. The part operates across a temperature range of -55°C to 125°C and is RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Substiute Parts

T491D227K006AS-F

Cornell Dubilier Electronics (CDE)In Stock: 1213T491D227K006AS-F Datasheet

Current PartRFQ

T491D227K006AT

KEMETIn Stock: 1848T491D227K006AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T491D227K006AS-F is determined by strict alignment of the following parameters:

Critical Parameters for Substitution:

• Capacitance: 220 µF (exact match required)
• Tolerance: ±10% (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)

Allowable Variation:

• Voltage - Rated: The substitute part T491D227K006AT is rated at 6.3 V, which exceeds the original 6 V specification. A higher voltage rating is acceptable in substitution as it provides additional safety margin without affecting circuit performance in applications designed for 6 V operation.

The T491D227K006AT from KEMET meets all critical substitution criteria and maintains full compatibility with the original part's electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The T491D227K006AT is the direct substitute for the obsolete T491D227K006AS-F. Selection of this part is based on the following engineering factors:

Product Status: The original part is obsolete, making the active T491D227K006AT the appropriate choice for new designs and ongoing production requirements.

Compliance: Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings (MSL 1), ensuring compatibility with current manufacturing and environmental standards.

Electrical Compatibility: The 6.3 V rating of the substitute exceeds the original 6 V specification, providing additional voltage margin. This higher rating does not degrade performance in circuits designed for 6 V operation and enhances reliability.

Physical Compatibility: Identical package dimensions (2917/7343 Metric), footprint, and height ensure direct PCB layout compatibility without design modifications.

Availability: The T491D227K006AT is currently in active production with confirmed inventory availability, eliminating supply chain risk associated with the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the T491D227K006AT directly replace the T491D227K006AS-F without PCB modifications?

A: Yes. Both parts use the identical 2917 (7343 Metric) package with matching dimensions (0.287" L x 0.169" W, 3.10mm max height) and surface mount configuration. No PCB layout changes are required.

Q: Why is the substitute part rated at 6.3 V instead of 6 V?

A: The higher voltage rating (6.3 V vs. 6 V) is acceptable in substitution. A component with a higher voltage rating operates safely in circuits designed for lower voltages, providing additional safety margin without affecting circuit performance.

Q: Are there any differences in operating temperature range?

A: No. Both parts operate across the identical temperature range of -55°C to 125°C, ensuring thermal compatibility in all application environments.

Q: What is the significance of the 700 mOhm ESR specification on the substitute part?

A: The ESR (Equivalent Series Resistance) value of 700 mOhm is provided for the substitute part but not specified for the original. This parameter characterizes the internal resistance of the capacitor and is relevant for high-frequency or high-current applications. The specified value is typical for molded tantalum capacitors in this class.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the T491D227K006AS-F and T491D227K006AT are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and manufacturing standards.

Q: What is the difference between the packaging options?

A: The original part packaging is not specified in the provided data. The substitute part is supplied in Tape & Reel (TR) format, which is standard for surface mount production environments and facilitates automated assembly processes.

Q: Can the T491D227K006AT be used in new designs?

A: Yes. The T491D227K006AT is classified as an active product with confirmed inventory availability, making it the appropriate choice for new design implementations and production requirements.