Equivalent & Substitute Parts for T491D226M020AS

Part Overview

The T491D226M020AS is a 22 µF molded tantalum capacitor manufactured by KEMET, rated for 20 V operation in a 2917 (7343 Metric) surface mount package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 125°C with an equivalent series resistance (ESR) of 800 mOhm and general-purpose application characteristics.

Substiute Parts

T491D226M020AS

KEMETIn Stock: 927T491D226M020AS Datasheet

Current PartRFQ

T491D226M020AT

KEMETIn Stock: 2366T491D226M020AT Datasheet

DirectRFQ

TAJD226M020RNJ

KYOCERA AVXIn Stock: 2302TAJD226M020RNJ Datasheet

DirectRFQ

293D226X0020D2TE3

Vishay SpragueIn Stock: 2010293D226X0020D2TE3 Datasheet

SimilarRFQ

TAJD226M020H

KYOCERA AVXIn Stock: 1002TAJD226M020H Datasheet

SimilarRFQ

TPSD226M020H0200

KYOCERA AVXIn Stock: 1019TPSD226M020H0200 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the T491D226M020AS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

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

Variable Parameters (Allowed Substitution Range):

• ESR (Equivalent Series Resistance): 200 mOhm to 900 mOhm
• Packaging Format: Tape & Reel (TR) or standard packaging
• Product Status: Active or Obsolete
• RoHS Compliance: RoHS3 Compliant or RoHS non-compliant

All identified substitute parts meet the mandatory matching criteria. Variations in ESR, packaging format, and compliance status are permitted within the scope of this substitution analysis.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Preferred for RoHS3 Compliance):

T491D226M020AT is the primary recommended substitute. This part is manufactured by KEMET under the same T491 series, maintains identical electrical specifications (22 µF, ±20%, 20 V, 800 mOhm ESR), and is classified as Active with ROHS3 Compliant status. The part is available in Tape & Reel packaging format with 2300 units in stock and includes a lifetime specification of 2000 Hrs @ 125°C.

Cross-Manufacturer Alternatives (Active Status):

TAJD226M020RNJ (KYOCERA AVX) and 293D226X0020D2TE3 (Vishay Sprague) are functionally equivalent alternatives from established manufacturers. Both parts are Active status and ROHS3 Compliant. TAJD226M020RNJ operates at 900 mOhm ESR, while 293D226X0020D2TE3 operates at 700 mOhm ESR. Both are available in Tape & Reel packaging.

Low-ESR Alternative:

TPSD226M020H0200 (KYOCERA AVX, TPS series) provides the lowest ESR specification at 200 mOhm, suitable for applications requiring reduced impedance characteristics. This part is Active status but RoHS non-compliant.

Compliance Consideration:

For applications requiring RoHS3 compliance, select from T491D226M020AT, TAJD226M020RNJ, or 293D226X0020D2TE3. For legacy or non-regulated applications, TAJD226M020H and TPSD226M020H0200 remain viable options.

Frequently Asked Questions (FAQ)

Q: Can T491D226M020AT directly replace T491D226M020AS in existing designs?

A: Yes. Both parts share identical electrical specifications (22 µF, ±20%, 20 V, 800 mOhm ESR) and the same 2917 (7343 Metric) package footprint. The primary difference is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant). Packaging format differs (Tape & Reel vs. standard), which affects procurement and handling but not circuit performance.

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

A: ESR values range from 200 mOhm to 900 mOhm across the substitute options. Lower ESR reduces impedance and improves high-frequency performance; higher ESR increases impedance. The original T491D226M020AS specifies 800 mOhm. Selection should be based on circuit requirements. TPSD226M020H0200 (200 mOhm) suits low-impedance applications, while TAJD226M020RNJ (900 mOhm) is suitable for general-purpose applications.

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

A: Yes. All substitute parts are specified for 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 standard packaging?

A: Tape & Reel (TR) packaging is formatted for automated pick-and-place assembly equipment, while standard packaging is suitable for manual handling or alternative assembly methods. Both formats contain identical components. Selection depends on manufacturing process requirements, not electrical performance.

Q: Which substitute part offers the best long-term availability?

A: T491D226M020AT (KEMET, Active status, 2300 units in stock) and 293D226X0020D2TE3 (Vishay Sprague, Active status, 1900 units in stock) both demonstrate strong availability. KEMET's T491D226M020AT includes documented lifetime specification (2000 Hrs @ 125°C), supporting long-term design confidence.

Q: Are there any compliance restrictions for substitute selection?

A: RoHS3 Compliance is available through T491D226M020AT, TAJD226M020RNJ, and 293D226X0020D2TE3. Applications subject to RoHS3 regulations must select from these three options. TAJD226M020H and TPSD226M020H0200 are RoHS non-compliant and suitable only for non-regulated applications.