Equivalent & Substitute Parts for T491C685M016AS

Part Overview

The T491C685M016AS is a 6.8 µF molded tantalum capacitor rated at 16 V in a 2312 (6032 Metric) surface mount package, manufactured by KEMET. 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 and features a 1.9 Ohm equivalent series resistance (ESR) with ±20% capacitance tolerance.

Substiute Parts

T491C685M016AS

KEMETIn Stock: 682T491C685M016AS Datasheet

Current PartRFQ

T491C685M016AT

KEMETIn Stock: 11404T491C685M016AT Datasheet

DirectRFQ

293D685X0016C2TE3

Vishay SpragueIn Stock: 1117293D685X0016C2TE3 Datasheet

SimilarRFQ

TAJC685M016H

KYOCERA AVXIn Stock: 982TAJC685M016H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T491C685M016AS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 6.8 µF
• Voltage Rating: 16 V
• Tolerance: ±20%
• Package / Case: 2312 (6032 Metric)
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C to 125°C
• ESR: 1.9 Ohm (where specified)
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalent: Parts from the same manufacturer (KEMET) with identical electrical and mechanical specifications, differing only in packaging format or product status.

Cross-Manufacturer Equivalent: Parts from alternative manufacturers (Vishay Sprague, KYOCERA AVX) that meet all mandatory electrical and mechanical parameters within the specified tolerances.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: T491C685M016AT

The T491C685M016AT is the direct equivalent from KEMET with active product status. This part maintains identical electrical specifications (6.8 µF, 16 V, ±20%, 1.9 Ohm ESR) and mechanical dimensions. The primary distinction is packaging format (Tape & Reel versus cut tape) and ROHS3 compliance. This part is suitable for applications requiring RoHS3 compliance and benefits from active manufacturer support and extended availability (11,389 units in stock).

Secondary Recommendation: 293D685X0016C2TE3

The 293D685X0016C2TE3 from Vishay Sprague (TANTAMOUNT™ series, 293D) provides cross-manufacturer equivalence with all mandatory electrical parameters matched. This part is ROHS3 compliant and active in production. The seated height is 2.79mm versus 2.80mm for the main part, representing a negligible 0.01mm variance within standard manufacturing tolerances. This option is suitable for applications where cross-manufacturer sourcing is acceptable.

Tertiary Option: TAJC685M016H

The TAJC685M016H from KYOCERA AVX (TAJ series) meets all mechanical and thermal specifications. However, ESR is not specified in available documentation. This part is RoHS non-compliant, matching the compliance status of the original T491C685M016AS. Selection of this part is appropriate only when RoHS non-compliance is acceptable and ESR specification is not critical to circuit performance.

Frequently Asked Questions (FAQ)

Q: Can T491C685M016AT be used as a direct replacement for T491C685M016AS?

A: Yes. Both parts share identical electrical specifications (6.8 µF, 16 V, ±20% tolerance, 1.9 Ohm ESR) and mechanical dimensions (2312 package, 6.00mm x 3.20mm x 2.80mm). The primary difference is product status (Active versus Obsolete) and packaging format (Tape & Reel versus cut tape). Electrical and mechanical compatibility is complete.

Q: What is the difference between the KEMET T491C685M016AT and the Vishay Sprague 293D685X0016C2TE3?

A: Both parts are electrically and mechanically equivalent with 6.8 µF capacitance, 16 V rating, and 1.9 Ohm ESR in the 2312 package. The primary differences are manufacturer (KEMET versus Vishay Sprague), series designation (T491 versus 293D), and seated height (2.80mm versus 2.79mm). The 0.01mm height difference is within standard manufacturing tolerances and does not affect PCB assembly compatibility.

Q: Is the TAJC685M016H from KYOCERA AVX suitable for all applications?

A: The TAJC685M016H meets all mechanical and thermal specifications. However, ESR is not specified in available documentation. Selection of this part is appropriate only when ESR specification is not critical to circuit performance. Additionally, this part is RoHS non-compliant, which may restrict use in applications requiring RoHS3 compliance.

Q: What is the significance of the MSL (Moisture Sensitivity Level) rating?

A: All listed parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These parts do not require special moisture control during storage, handling, or assembly, simplifying procurement and manufacturing processes.

Q: Are there packaging format differences between substitute parts?

A: The T491C685M016AS original part does not specify packaging format. The T491C685M016AT is supplied in Tape & Reel (TR) format. The 293D685X0016C2TE3 is also supplied in Tape & Reel format. The TAJC685M016H packaging format is not specified. Tape & Reel packaging is standard for high-volume surface mount assembly and is compatible with automated pick-and-place equipment.

Q: What compliance certifications apply to these parts?

A: The T491C685M016AT and 293D685X0016C2TE3 are ROHS3 compliant. The T491C685M016AS and TAJC685M016H are RoHS non-compliant. All parts are REACH Unaffected and classified as EAR99 for export control purposes. HTSUS classification is 8532.21.0050 for all parts.