T496C685M020AS Molded Tantalum Capacitor Equivalent & Substitute Parts

Part Overview

The T496C685M020AS is a 6.8 µF molded tantalum capacitor rated at 20 V, manufactured by KEMET in the T496 series. This component features a fail-safe design with built-in fuse protection and is housed in a 2312 (6032 Metric) surface mount package. The part is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain identical electrical specifications and mechanical compatibility while preferably offering improved product status and compliance certifications.

Substiute Parts

T496C685M020AS

KEMETIn Stock: 1154T496C685M020AS Datasheet

Current PartRFQ

T496C685M020AT

KEMETIn Stock: 978T496C685M020AT Datasheet

DirectRFQ

T496C685K020AT

KEMETIn Stock: 926T496C685K020AT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the T496C685M020AS is determined by strict adherence to the following parameters:

Critical Parameters (Must Match Exactly):

• Capacitance: 6.8 µF
• Voltage Rating: 20 V
• Package / Case: 2312 (6032 Metric)
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C ~ 125°C
• Type: Molded
• Features: Fail Safe with Built-in Fuse
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

• Tolerance: ±20% (main part) to ±10% (substitute) — tighter tolerance is acceptable
• ESR (Equivalent Series Resistance): Specified in active substitutes (2Ohm) versus unspecified in obsolete main part
• Product Status: Obsolete (main part) to Active (substitutes)
• RoHS Status: Non-compliant (main part) to ROHS3 Compliant (substitutes)
• Packaging Format: Bulk to Tape & Reel (TR)

Two substitute parts meet these criteria, both from KEMET's T496 series with identical mechanical and core electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

T496C685M020AT (Direct Substitute): This part is the primary substitute for the obsolete T496C685M020AS. It maintains identical electrical specifications (6.8 µF, ±20% tolerance, 20 V rating) and mechanical compatibility (2312 package, surface mount, identical dimensions). The T496C685M020AT is active in production status and ROHS3 compliant, addressing regulatory requirements. ESR specification of 2 Ohm and lifetime rating of 2000 Hrs @ 85°C provide documented performance characteristics absent in the obsolete main part. Packaging in Tape & Reel format supports automated assembly processes.

T496C685K020AT (Parametric Equivalent): This part offers tighter capacitance tolerance (±10% versus ±20%), providing improved precision for applications requiring stricter component specifications. All other electrical and mechanical parameters remain identical to the main part. The T496C685K020AT is active in production and ROHS3 compliant. Selection of this part is appropriate when circuit design specifications demand tolerance tighter than ±20%.

Both substitutes are suitable for direct replacement in applications currently using the T496C685M020AS, with selection between them determined by tolerance requirements and design specifications.

Frequently Asked Questions (FAQ)

Q: Can T496C685M020AT be used as a direct replacement for T496C685M020AS?

A: Yes. The T496C685M020AT is electrically and mechanically compatible with the T496C685M020AS. Both parts share identical capacitance (6.8 µF), voltage rating (20 V), package (2312), dimensions, and operating temperature range. The T496C685M020AT is active in production and ROHS3 compliant, making it the recommended substitute for the obsolete main part.

Q: What is the difference between T496C685M020AT and T496C685K020AT?

A: The primary difference is capacitance tolerance. T496C685M020AT has ±20% tolerance, matching the main part specification. T496C685K020AT has ±10% tolerance, providing tighter precision. Both parts are electrically and mechanically identical in all other parameters. Selection depends on circuit tolerance requirements.

Q: Are the substitute parts available in the same packaging as the main part?

A: The main part T496C685M020AS is supplied in bulk packaging. Both substitute parts (T496C685M020AT and T496C685K020AT) are supplied in Tape & Reel (TR) format, which is standard for automated assembly processes. Tape & Reel packaging is compatible with pick-and-place equipment used in modern PCB assembly.

Q: Do the substitute parts meet RoHS compliance requirements?

A: Yes. Both T496C685M020AT and T496C685K020AT are ROHS3 compliant. The main part T496C685M020AS is RoHS non-compliant. If RoHS compliance is required for your application, either substitute part satisfies this requirement.

Q: Are there any differences in operating temperature range?

A: No. All three parts (main and both substitutes) operate across the identical temperature range of -55°C to 125°C. Operating temperature specifications are fully compatible.

Q: What does the fail-safe feature with built-in fuse mean?

A: All three parts include fail-safe design with built-in fuse protection. This feature provides protection against capacitor failure modes by incorporating an internal fuse mechanism that disconnects the capacitor in the event of internal short circuit or overstress conditions.

Q: Can I use T496C685K020AT in place of T496C685M020AT?

A: Yes, with consideration for tolerance requirements. T496C685K020AT has tighter tolerance (±10%) compared to T496C685M020AT (±20%). If your circuit design specifies ±20% tolerance, T496C685K020AT will also satisfy this requirement due to its tighter tolerance. If your design specifically requires ±20% tolerance and no tighter, both parts are acceptable.

Q: What is the moisture sensitivity level, and does it affect handling?

A: All three parts have Moisture Sensitivity Level (MSL) of 1, classified as Unlimited. This indicates the component has no moisture sensitivity restrictions and does not require special moisture control during storage, handling, or assembly.