T494D685M050AS Equivalent & Substitute Parts

Part Overview

The T494D685M050AS is a 6.8 µF molded tantalum capacitor rated for 50 V operation in a 2917 (7343 Metric) surface mount package. Manufactured by KEMET, this component is classified as obsolete product status. Due to its obsolescence, identifying equivalent and substitute parts with matching electrical and mechanical specifications is necessary for design continuity and procurement planning. Substitute parts must maintain identical capacitance, voltage rating, tolerance, package dimensions, and mounting characteristics to ensure direct replacement capability.

Substiute Parts

T494D685M050AS

KEMETIn Stock: 842T494D685M050AS Datasheet

Current PartRFQ

T494D685M050AT

KEMETIn Stock: 1757T494D685M050AT Datasheet

DirectRFQ

TR3D685M050C0500

Vishay SpragueIn Stock: 1003TR3D685M050C0500 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the T494D685M050AS is determined by strict equivalence across the following parameters:

Primary Substitution Criteria:

• Capacitance value: 6.8 µF (exact match required)
• Voltage rating: 50 V (exact match required)
• Tolerance: ±20% (exact match required)
• Package / Case: 2917 (7343 Metric) (exact match required)
• Mounting type: Surface Mount (exact match required)
• Operating temperature range: -55°C to 125°C (exact match required)
• Physical dimensions: 0.287" L x 0.169" W, height 0.122" max (exact match required)

Secondary Considerations:

• ESR (Equivalent Series Resistance) may vary within acceptable ranges for the application
• Manufacturer and series designation may differ
• Product status and compliance certifications may differ
• Packaging format (Cut Tape, Tape & Reel) does not affect electrical compatibility

Parts meeting all primary criteria are classified as direct substitutes. Variations in ESR or lifetime specifications do not disqualify substitution when all primary electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

T494D685M050AT (KEMET - Direct Substitute)

The T494D685M050AT is a direct electrical and mechanical equivalent to the T494D685M050AS. Both parts share identical capacitance, voltage rating, tolerance, package dimensions, and operating temperature specifications. The T494D685M050AT maintains active product status, ensuring ongoing availability and supply chain continuity. This part is RoHS3 compliant, providing regulatory advantage over the obsolete main part. ESR and lifetime specifications are identical. The T494D685M050AT is available in Cut Tape and Digi-Reel packaging formats with 1712 units in stock.

TR3D685M050C0500 (Vishay Sprague - Similar Substitute)

The TR3D685M050C0500 meets all primary substitution criteria with identical capacitance, voltage rating, tolerance, package type, and physical dimensions. This part is manufactured by Vishay Sprague under the TANTAMOUNT™ TR3 series and maintains active product status. The ESR specification differs at 500 mOhm compared to 700 mOhm in the main part, representing a lower resistance characteristic. This part is RoHS3 compliant. The TR3D685M050C0500 is available in Tape & Reel packaging with 960 units in stock.

Selection Basis:

Both substitute parts satisfy all mandatory electrical and mechanical parameters. Selection between them should be based on:

• Preferred manufacturer and supply chain relationships
• Packaging format requirements (Cut Tape vs. Tape & Reel)
• Inventory availability and lead time
• ESR performance requirements for the specific application circuit
• RoHS3 compliance requirements for end-use applications

Frequently Asked Questions (FAQ)

Q: Can T494D685M050AT directly replace T494D685M050AS on the PCB?

A: Yes. The T494D685M050AT is a direct substitute with identical electrical specifications (6.8 µF, 50 V, ±20% tolerance), ESR (700 mOhm), operating temperature range (-55°C to 125°C), and physical dimensions (2917 package, 0.287" L x 0.169" W, 0.122" max height). No circuit modifications are required.

Q: What is the difference between T494D685M050AT and TR3D685M050C0500?

A: Both parts are electrically and mechanically equivalent in capacitance, voltage, tolerance, package, and dimensions. The primary difference is ESR: T494D685M050AT has 700 mOhm ESR while TR3D685M050C0500 has 500 mOhm ESR. The Vishay part offers lower series resistance. Manufacturer and series designation also differ (KEMET T494 vs. Vishay Sprague TR3).

Q: Why is the main part T494D685M050AS marked as obsolete?

A: Product status reflects KEMET's discontinuation of this specific part number. The T494D685M050AT, also from KEMET, maintains the same specifications and is actively produced, making it the preferred KEMET alternative.

Q: Are there packaging differences between the substitute parts?

A: Yes. T494D685M050AT is available in Cut Tape (CT) and Digi-Reel® formats. TR3D685M050C0500 is supplied in Tape & Reel (TR) format. Both packaging formats are standard for surface mount tantalum capacitors and do not affect electrical performance or PCB assembly compatibility.

Q: Is RoHS compliance important for this substitution?

A: Both active substitute parts (T494D685M050AT and TR3D685M050C0500) are RoHS3 compliant, while the main part T494D685M050AS is RoHS non-compliant. For applications requiring RoHS compliance, either substitute part satisfies regulatory requirements.

Q: Can I use TR3D685M050C0500 if my circuit requires 700 mOhm ESR?

A: The TR3D685M050C0500 has 500 mOhm ESR, which is lower than the 700 mOhm specification of the main part. Lower ESR generally reduces impedance and heat generation. Circuit compatibility depends on specific ESR requirements; if 700 mOhm is a maximum specification, the Vishay part is acceptable. If 700 mOhm is a minimum requirement, use T494D685M050AT.

Q: What is the inventory status for these parts?

A: T494D685M050AS (main part): 758 units in stock. T494D685M050AT (KEMET substitute): 1712 units in stock. TR3D685M050C0500 (Vishay substitute): 960 units in stock. All parts are listed as new original stock.