Equivalent & Substitute Parts for T491D226M025AS

Part Overview

The T491D226M025AS is a 22 µF molded tantalum capacitor rated at 25 V in a 2917 (7343 Metric) surface mount package, manufactured by KEMET. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. The part operates across a temperature range of -55°C to 125°C with an equivalent series resistance (ESR) of 800 mOhm and ±20% capacitance tolerance. Due to its obsolete status, direct substitutes from active product lines are required to maintain supply chain reliability.

Substiute Parts

T491D226M025AS

KEMETIn Stock: 2026T491D226M025AS Datasheet

Current PartRFQ

T491D226M025AT

KEMETIn Stock: 28069T491D226M025AT Datasheet

DirectRFQ

TAJD226M025RNJ

KYOCERA AVXIn Stock: 2322TAJD226M025RNJ Datasheet

DirectRFQ

293D226X0025D2TE3

Vishay SpragueIn Stock: 1876293D226X0025D2TE3 Datasheet

SimilarRFQ

TAJD226M025H

KYOCERA AVXIn Stock: 694TAJD226M025H Datasheet

SimilarRFQ

TPSD226M025H0100

KYOCERA AVXIn Stock: 890TPSD226M025H0100 Datasheet

SimilarRFQ

TPSD226M025H0200

KYOCERA AVXIn Stock: 1051TPSD226M025H0200 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the T491D226M025AS is determined by strict adherence to the following parameters:

Critical Parameters (Must Match Exactly):

• Capacitance: 22 µF
• Voltage Rating: 25 V
• Tolerance: ±20%
• Package / Case: 2917 (7343 Metric)
• Mounting Type: Surface Mount
• Type: Molded Tantalum
• Operating Temperature Range: -55°C to 125°C
• Moisture Sensitivity Level: 1 (Unlimited)

Variable Parameters (Allowed to Differ):

• ESR (Equivalent Series Resistance): Variation permitted within component design specifications
• Packaging Format: Tape & Reel (TR), Cut Tape (CT), or bulk
• Product Status: Active alternatives preferred over obsolete
• RoHS Compliance: Compliance status may differ
• Manufacturer: Different manufacturers acceptable if all critical parameters match

The following parts meet all critical parameter requirements and are classified as direct or similar equivalents.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: T491D226M025AT (KEMET)

The T491D226M025AT is the direct successor to the T491D226M025AS within the KEMET T491 series. It maintains identical electrical specifications (22 µF, 25 V, ±20%, 800 mOhm ESR) and mechanical compatibility (2917 package, surface mount). The part is active in production with ROHS3 compliance, ensuring long-term availability and regulatory alignment. The only difference is packaging format (Tape & Reel versus bulk), which does not affect electrical or mechanical performance.

Secondary Recommendation: 293D226X0025D2TE3 (Vishay Sprague)

The 293D226X0025D2TE3 from Vishay Sprague's TANTAMOUNT™ 293D series meets all critical electrical and mechanical parameters. It offers a lower ESR specification (700 mOhm versus 800 mOhm), which provides improved performance characteristics in high-frequency applications. The part is active with ROHS3 compliance and available in Tape & Reel format.

Tertiary Recommendation: TAJD226M025RNJ (KYOCERA AVX)

The TAJD226M025RNJ from KYOCERA AVX's TAJ series satisfies all critical substitution criteria. ESR is specified at 900 mOhm, representing a marginal increase from the original 800 mOhm. The part is active with ROHS3 compliance and available in Cut Tape & Digi-Reel® format.

Alternative Consideration: TPSD226M025H0100 and TPSD226M025H0200 (KYOCERA AVX)

The TPSD226M025H0100 (100 mOhm ESR) and TPSD226M025H0200 (200 mOhm ESR) from KYOCERA AVX's TPS series are functionally equivalent but feature significantly lower ESR values. These parts are suitable for applications requiring reduced impedance characteristics. Both are active in production and available in Tape & Reel format. RoHS compliance status differs from the primary recommendation.

Alternative Consideration: TAJD226M025H (KYOCERA AVX)

The TAJD226M025H from KYOCERA AVX's TAJ series is functionally equivalent with 900 mOhm ESR. The part is active in production but does not carry ROHS3 compliance, matching the non-compliant status of the original T491D226M025AS.

Frequently Asked Questions (FAQ)

Q: Can T491D226M025AT be used as a direct replacement for T491D226M025AS?

A: Yes. The T491D226M025AT is electrically and mechanically identical to the T491D226M025AS. Both parts share the same capacitance (22 µF), voltage rating (25 V), tolerance (±20%), ESR (800 mOhm), package (2917), and operating temperature range (-55°C to 125°C). The only difference is packaging format (Tape & Reel versus bulk), which does not affect circuit performance.

Q: What does ESR variation mean for circuit performance?

A: ESR (Equivalent Series Resistance) affects impedance characteristics and ripple current handling. Lower ESR values (such as 100-200 mOhm in the TPS series) reduce impedance and are beneficial in high-frequency or high-ripple-current applications. Higher ESR values (such as 900 mOhm) are acceptable in general-purpose applications. Selection depends on specific circuit requirements.

Q: Are all substitute parts compatible with the 2917 package footprint?

A: Yes. All listed substitute parts use the 2917 (7343 Metric) package with identical dimensions: 0.287" L × 0.169" W (7.30 mm × 4.30 mm) and maximum seated height of 0.122" (3.10 mm). PCB footprints and assembly processes require no modification.

Q: What is the difference between Tape & Reel and bulk packaging?

A: Tape & Reel (TR) and Cut Tape (CT) formats are automated assembly-compatible packaging methods suitable for high-volume production. Bulk packaging is used for manual assembly or lower-volume applications. Electrical and mechanical performance is identical regardless of packaging format.

Q: Why is RoHS compliance status different across substitute parts?

A: RoHS compliance depends on manufacturing processes and material composition established by each manufacturer. The original T491D226M025AS is RoHS non-compliant. Active alternatives include both compliant (T491D226M025AT, 293D226X0025D2TE3, TAJD226M025RNJ) and non-compliant (TAJD226M025H, TPSD226M025H0100, TPSD226M025H0200) options. Selection should align with end-product regulatory requirements.

Q: Can parts from different manufacturers be mixed in the same design?

A: Yes. All listed substitute parts meet identical critical electrical and mechanical specifications. Mixing manufacturers is acceptable from a functional standpoint. However, design documentation should specify approved part numbers to maintain consistency and traceability.

Q: What is Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture-related degradation. All listed parts carry MSL 1 classification, meaning standard storage conditions apply without special desiccant or humidity control requirements.