T494X686M025AS Equivalent & Substitute Parts

Part Overview

The T494X686M025AS is a 68 µF molded tantalum capacitor manufactured by KEMET, rated for 25 V operation in a 2917 (7343 Metric) surface mount package. This component is classified as obsolete, indicating it is no longer in active production. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing procurement for legacy systems or new designs requiring this capacitance and voltage specification.

Substiute Parts

T494X686M025AS

KEMETIn Stock: 828T494X686M025AS Datasheet

Current PartRFQ

T494X686M025AT

KEMETIn Stock: 2434T494X686M025AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T494X686M025AS is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 68 µF (exact match required)
• Voltage Rating: 25 V (exact match required)
• Tolerance: ±20% (exact match required)
• Package / Case: 2917 (7343 Metric) (exact match required for PCB compatibility)
• Mounting Type: Surface Mount (exact match required)
• ESR: 300 mOhm (exact match required for circuit performance)
• Operating Temperature Range: -55°C to 125°C (exact match required)
• Lifetime @ Temperature: 2000 Hrs @ 125°C (exact match required)
• Type: Molded Tantalum (exact match required)

The substitute part T494X686M025AT meets all these criteria and is therefore a direct functional equivalent. The primary distinction between the main part and its substitute is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The T494X686M025AT is the direct substitute for the obsolete T494X686M025AS. Both components are electrically and mechanically identical across all specified parameters. Selection between these parts should be based on the following factors:

Product Status: The T494X686M025AS is obsolete and no longer manufactured. The T494X686M025AT is active and in current production, ensuring long-term availability and supply chain reliability.

Compliance Certification: The T494X686M025AT is ROHS3 compliant, whereas the T494X686M025AS is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements, the T494X686M025AT is the appropriate selection.

Packaging Availability: The T494X686M025AT is available in Cut Tape (CT) and Digi-Reel® packaging formats, supporting both prototype and production-volume procurement workflows.

For new designs or component replenishment, the T494X686M025AT is the recommended selection due to active production status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the T494X686M025AT be used as a direct replacement for the T494X686M025AS in existing designs?

A: Yes. The T494X686M025AT is electrically and mechanically equivalent to the T494X686M025AS. All electrical parameters, including capacitance, voltage rating, tolerance, ESR, and operating temperature range are identical. The physical package dimensions and mounting type are also identical, allowing direct PCB substitution without layout modifications.

Q: What is the difference between the T494X686M025AS and T494X686M025AT?

A: The primary differences are product status and regulatory compliance. The T494X686M025AS is obsolete and RoHS non-compliant. The T494X686M025AT is in active production and ROHS3 compliant. All electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns when substituting the T494X686M025AT for the T494X686M025AS?

A: No compatibility concerns exist. Both components share the same 2917 (7343 Metric) package footprint, identical physical dimensions, and surface mount mounting type. Circuit performance is identical due to matching capacitance, voltage rating, tolerance, and ESR specifications.

Q: What packaging options are available for the T494X686M025AT?

A: The T494X686M025AT is available in Cut Tape (CT) and Digi-Reel® packaging formats, supporting both small-quantity and high-volume procurement requirements.

Q: Is the T494X686M025AT suitable for applications requiring RoHS compliance?

A: Yes. The T494X686M025AT is ROHS3 compliant, making it suitable for applications and markets with RoHS regulatory requirements. The obsolete T494X686M025AS is RoHS non-compliant.

Q: Are the operating temperature ranges identical between these two parts?

A: Yes. Both the T494X686M025AS and T494X686M025AT operate across the identical temperature range of -55°C to 125°C with a lifetime specification of 2000 hours at 125°C.

Q: What is the moisture sensitivity level for these capacitors?

A: Both components have a Moisture Sensitivity Level (MSL) of 1, indicating unlimited shelf life without moisture control requirements.