T494R685K006AT Equivalent & Substitute Parts

Part Overview

The T494R685K006AT is a 6.8 µF molded tantalum capacitor manufactured by KEMET, rated for 6.3 V operation in a 0805 (2012 Metric) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct replacement capability in existing circuit applications.

Substiute Parts

T494R685K006AT

KEMETIn Stock: 1083T494R685K006AT Datasheet

Current PartRFQ

595D685X96R3T2T

Vishay SpragueIn Stock: 1015595D685X96R3T2T Datasheet

SimilarRFQ

TACR685K006R

KYOCERA AVXIn Stock: 755TACR685K006R Datasheet

SimilarRFQ

TACR685K006X

KYOCERA AVXIn Stock: 942TACR685K006X Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the T494R685K006AT is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 6.8 µF
• Tolerance: ±10%
• Voltage Rating: 6.3 V
• Package: 0805 (2012 Metric)
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C ~ 125°C
• RoHS3 Compliance

Allowable Variations:

• Tantalum capacitor type (molded or conformal coated)
• ESR (Equivalent Series Resistance): Lower values are acceptable
• Physical dimensions within 0805 package constraints
• Moisture Sensitivity Level (MSL): Variations permitted based on application requirements
• Packaging format (bulk or tape & reel)

All identified substitute parts meet the mandatory electrical and mechanical parameters, enabling direct functional replacement in circuit designs.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status):

The TACR685K006X (KYOCERA AVX) and TACR685K006R (KYOCERA AVX) are the preferred substitutes for the obsolete T494R685K006AT. Both parts are active products with identical electrical specifications, matching capacitance, tolerance, voltage rating, and operating temperature range. These molded tantalum capacitors maintain ROHS3 compliance and MSL Level 1 rating, providing equivalent reliability characteristics to the original component. The TACR685K006X is available in tape & reel packaging, suitable for automated assembly processes.

Secondary Substitute (Alternative Type):

The 595D685X96R3T2T (Vishay Sprague) provides functional equivalence with conformal coating technology. This part meets all mandatory electrical parameters and maintains ROHS3 compliance. The conformal coated construction offers enhanced moisture protection, though it carries MSL Level 2A rating. The lower ESR value (8.5 Ohm versus 10 Ohm) provides improved high-frequency performance characteristics. Physical dimensions are within acceptable 0805 package tolerances.

Selection Criteria:

• For direct replacement in existing designs: Select TACR685K006X or TACR685K006R
• For applications requiring enhanced moisture resistance: Select 595D685X96R3T2T
• For tape & reel automated assembly: Select TACR685K006X
• For bulk packaging: Select TACR685K006R

All substitutes maintain full compatibility with the original circuit design specifications and PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the 595D685X96R3T2T replace the T494R685K006AT directly?

A: Yes. The 595D685X96R3T2T meets all mandatory electrical specifications: 6.8 µF capacitance, ±10% tolerance, 6.3 V rating, and 0805 package format. The conformal coated construction and lower ESR value (8.5 Ohm) provide equivalent or improved performance. MSL Level 2A requires standard moisture handling procedures during assembly.

Q: What is the difference between molded and conformal coated tantalum capacitors?

A: Molded tantalum capacitors (TACR series) feature a protective molded epoxy coating and carry MSL Level 1 (unlimited moisture sensitivity). Conformal coated capacitors (595D series) have an additional protective coating layer and carry MSL Level 2A (4-week moisture sensitivity). Both types meet the same electrical specifications for this application.

Q: Are there physical dimension differences that affect PCB layout?

A: Minor dimensional variations exist within the 0805 package specification. The T494R685K006AT measures 2.00mm x 1.30mm with 1.20mm maximum height. The TACR685K006X/R measures 2.00mm x 1.35mm with 1.50mm maximum height. The 595D685X96R3T2T measures 2.20mm x 1.10mm with 1.45mm maximum height. These variations remain within standard 0805 package tolerances and do not require PCB redesign.

Q: Which substitute offers the lowest ESR?

A: The TACR685K006X and TACR685K006R both provide 5 Ohm ESR, compared to the original 10 Ohm ESR. This lower ESR improves high-frequency performance and reduces heat generation. The 595D685X96R3T2T provides 8.5 Ohm ESR, intermediate between the original and KYOCERA AVX alternatives.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All identified substitute parts carry ROHS3 compliance certification, matching the original T494R685K006AT specification.

Q: What packaging options are available?

A: The TACR685K006X is supplied in tape & reel (TR) format for automated assembly. The TACR685K006R is supplied in standard packaging. The 595D685X96R3T2T is supplied in tape & reel format. Selection depends on assembly process requirements.