T491D107K010AS-F Equivalent & Substitute Parts

Part Overview

The T491D107K010AS-F is a 100 µF molded tantalum capacitor rated for 10 V operation in the 2917 (7343 Metric) package form factor. This Cornell Dubilier Electronics component is currently classified as obsolete. Due to its discontinued status, sourcing equivalent or substitute parts from active manufacturers is necessary to support new designs or maintain production continuity for existing applications. The substitute parts identified maintain functional equivalency through matching core electrical specifications and mechanical compatibility.

Substiute Parts

T491D107K010AS-F

Cornell Dubilier Electronics (CDE)In Stock: 975T491D107K010AS-F Datasheet

Current PartRFQ

T491D107K010AT

KEMETIn Stock: 1600T491D107K010AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T491D107K010AS-F is based on the following critical electrical and mechanical parameters that must remain constant:

• Capacitance: 100 µF
• Voltage Rating: 10 V
• Tolerance: ±10%
• Package: 2917 (7343 Metric)
• Mounting Type: Surface Mount
• Physical Dimensions: 0.287" L x 0.169" W (7.30mm x 4.30mm), Height 0.122" (3.10mm max)
• Operating Temperature: -55°C ~ 125°C
• Type: Molded Tantalum

The T491D107K010AT from KEMET meets all of these substitution criteria. This part maintains identical electrical ratings and mechanical compatibility while transitioning from an obsolete supplier to an active manufacturer with established reliability data.

Parameter Comparison

Engineering Selection Recommendations

The T491D107K010AT from KEMET is the direct substitute for the obsolete T491D107K010AS-F. Key advantages include:

• Active Product Status: KEMET's part is in active production, ensuring long-term availability and supply chain stability.
• Full Compliance: Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings, suitable for demanding applications.
• Reliability Documentation: The KEMET substitute provides specified lifetime data (2000 Hrs @ 125°C) and characterized ESR (700mOhm), enabling more precise circuit performance calculations.
• Mechanical and Electrical Equivalence: Identical package dimensions, voltage rating, capacitance, tolerance, and operating temperature range guarantee direct PCB and schematic compatibility.

Frequently Asked Questions (FAQ)

Q: Can the T491D107K010AT be used as a direct replacement for the T491D107K010AS-F?

A: Yes. Both parts share identical capacitance (100 µF), voltage rating (10 V), tolerance (±10%), package (2917), physical dimensions, operating temperature range, and mounting type. Direct substitution on the PCB is mechanically and electrically compatible.

Q: What does it mean that the T491D107K010AS-F is obsolete?

A: The part is no longer manufactured by Cornell Dubilier Electronics. The T491D107K010AT provides equivalent functionality and is sourced from an active manufacturer.

Q: Are there any differences in package or footprint between these parts?

A: No. Both use the 2917 (7343 Metric) package with identical dimensions: 0.287" L x 0.169" W (7.30mm x 4.30mm), with a maximum seated height of 0.122" (3.10mm).

Q: Do these parts have the same moisture sensitivity rating?

A: Yes. Both are rated MSL 1 (Unlimited), meaning they have no moisture sensitivity requirements during storage or handling.

Q: What is the significance of ESR in the T491D107K010AT specification?

A: ESR (Equivalent Series Resistance) of 700mOhm characterizes the internal resistance of the capacitor. This value is important for high-frequency applications and noise filtering performance. The original part specification did not provide this value.

Q: Are both parts RoHS compliant?

A: Yes. Both the T491D107K010AS-F and T491D107K010AT are ROHS3 compliant, meeting environmental regulations for hazardous substance restrictions.

Q: Can I use the T491D107K010AT in new designs?

A: Yes. The active product status, full compliance certifications, and specified reliability data make the T491D107K010AT suitable for new circuit designs. The identical electrical and mechanical specifications ensure compatibility with existing schematics and PCB layouts.