T494C106M025AS Equivalent & Substitute Parts

Part Overview

The T494C106M025AS is a 10 µF molded tantalum capacitor manufactured by KEMET, rated for 25 V operation in a 2312 (6032 Metric) surface mount package. This component is classified as obsolete, indicating discontinuation from the manufacturer's active product line. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this capacitor specification.

Substiute Parts

T494C106M025AS

KEMETIn Stock: 812T494C106M025AS Datasheet

Current PartRFQ

T494C106M025AT

KEMETIn Stock: 21094T494C106M025AT Datasheet

DirectRFQ

TAJC106M025HNJ

KYOCERA AVXIn Stock: 1059TAJC106M025HNJ Datasheet

SimilarRFQ

TR3C106M020C0450

Vishay SpragueIn Stock: 1015TR3C106M020C0450 Datasheet

SimilarRFQ

TR3C106M025C0450

Vishay SpragueIn Stock: 982TR3C106M025C0450 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T494C106M025AS is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Capacitance: 10 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Voltage Rating: 25 V (minimum acceptable rating)
• Package / Case: 2312 (6032 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Physical Dimensions: 0.236" L x 0.126" W, Height 0.110" max (exact match required)

Secondary Consideration Parameters:

• ESR (Equivalent Series Resistance): Variations acceptable within application-specific circuit requirements
• Product Status: Active status preferred for long-term availability
• RoHS Compliance: Compliance status noted for regulatory requirements
• Manufacturer: Alternative manufacturers acceptable when primary criteria are met

Substitute parts are grouped into two categories: direct equivalents (identical electrical and mechanical specifications) and similar alternatives (matching primary criteria with acceptable parameter variations).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent - Preferred Substitute:

The T494C106M025AT is the primary recommended substitute for the T494C106M025AS. Both components are manufactured by KEMET within the T494 series and share identical electrical and mechanical specifications: 10 µF capacitance, ±20% tolerance, 25 V rating, 2312 package, and 600mOhm ESR. The T494C106M025AT maintains active product status, ensuring long-term availability and supply chain continuity. The primary distinction is packaging format: T494C106M025AT is supplied in Tape & Reel format, whereas the original part was supplied in bulk. The T494C106M025AT achieves ROHS3 compliance, providing regulatory advantage over the non-compliant original part.

Alternative Substitutes - Acceptable with Parameter Variations:

The TR3C106M025C0450 (Vishay Sprague) provides full electrical and mechanical equivalence to the T494C106M025AS with the exception of ESR specification. This part maintains 10 µF capacitance, ±20% tolerance, 25 V rating, and identical 2312 package dimensions. The TR3C106M025C0450 features 450mOhm ESR compared to the original 600mOhm specification, representing a performance improvement in terms of reduced series resistance. This part is active and ROHS3 compliant.

The TAJC106M025HNJ (KYOCERA AVX) meets all primary equivalence criteria with identical capacitance, tolerance, voltage rating, and package specifications. This part features significantly lower ESR at 1.8Ohm, which may provide circuit performance benefits in applications sensitive to series resistance. However, this part maintains RoHS non-compliant status. REACH status is listed as affected, requiring verification for applications subject to REACH regulations.

The TR3C106M020C0450 (Vishay Sprague) is acceptable as a substitute only for applications where the 20 V voltage rating is sufficient. This part is not recommended for circuits designed for 25 V operation. The 450mOhm ESR provides improved performance relative to the original 600mOhm specification.

Compliance Considerations:

For applications requiring RoHS3 compliance, the T494C106M025AT and TR3C106M025C0450 are the only suitable options among the provided substitutes. The original T494C106M025AS and TAJC106M025HNJ do not meet RoHS3 requirements.

Frequently Asked Questions (FAQ)

Q: Can the T494C106M025AT be used as a direct replacement for the T494C106M025AS?

A: Yes. The T494C106M025AT is a direct electrical and mechanical equivalent. Both parts share identical capacitance (10 µF), tolerance (±20%), voltage rating (25 V), package (2312), and ESR (600mOhm) specifications. The primary difference is packaging format: T494C106M025AT is supplied in Tape & Reel format for automated assembly, while the original was supplied in bulk. Both are suitable for identical circuit applications.

Q: What is the significance of ESR differences among the substitute parts?

A: Equivalent Series Resistance (ESR) affects circuit performance in applications sensitive to impedance characteristics. The original T494C106M025AS specifies 600mOhm ESR. Substitute parts with lower ESR values (TR3C106M025C0450 at 450mOhm, TAJC106M025HNJ at 1.8Ohm) provide reduced series resistance, which can improve performance in high-frequency filtering and power supply applications. Substitutes with lower ESR are generally acceptable for circuits designed for the original part, as they represent performance improvements rather than degradation.

Q: Is the TR3C106M020C0450 suitable for replacement in all applications?

A: No. The TR3C106M020C0450 is rated for 20 V operation, while the original T494C106M025AS is rated for 25 V. This substitute is acceptable only for applications where the circuit voltage does not exceed 20 V. For circuits designed to operate at 25 V, this part does not meet the voltage rating requirement and is not suitable.

Q: What are the packaging implications of switching from bulk to Tape & Reel format?

A: The T494C106M025AT is supplied in Tape & Reel (TR) format, which is standard for automated surface mount assembly. Bulk packaging (original part) is typically used for manual assembly or lower-volume applications. Tape & Reel format provides advantages in automated manufacturing environments, including improved handling efficiency and reduced component damage during assembly. The electrical and mechanical specifications remain identical regardless of packaging format.

Q: Are there compliance differences between the substitute parts?

A: Yes. The T494C106M025AT and TR3C106M025C0450 are ROHS3 compliant, while the original T494C106M025AS and TAJC106M025HNJ are RoHS non-compliant. For applications subject to RoHS regulations, only the compliant substitutes are acceptable. The TAJC106M025HNJ also carries REACH Affected status, requiring verification for applications subject to REACH regulations. The T494C106M025AT, TR3C106M020C0450, and TR3C106M025C0450 are REACH Unaffected.

Q: Why is the original T494C106M025AS classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued this part from its active product line. This classification necessitates identification of substitute parts to ensure continued availability for production and maintenance applications. Active substitute parts such as T494C106M025AT provide equivalent functionality with the advantage of ongoing manufacturer support and supply chain availability.

Q: Can multiple substitute parts be used interchangeably within the same design?

A: Substitutes with identical electrical specifications (T494C106M025AT and TR3C106M025C0450 for 25 V applications) are interchangeable from an electrical standpoint. However, design validation should confirm that ESR variations do not affect circuit performance in applications where impedance characteristics are critical. Parts with different voltage ratings (TR3C106M020C0450) are not interchangeable with the original 25 V design.

Q: What is the significance of Moisture Sensitivity Level (MSL) 1 classification?

A: MSL 1 (Unlimited) indicates that the component has unlimited shelf life and does not require special moisture control during storage or handling. All substitute parts listed maintain MSL 1 classification, ensuring consistent handling requirements across all options.