T491C226M016AT4021 Equivalent & Substitute Parts

Part Overview

The T491C226M016AT4021 is a 22 µF molded tantalum capacitor manufactured by KEMET, rated for 16 V with ±20% tolerance. This surface mount component is housed in a 2312 (6032 Metric) package and features 1.5 Ohm equivalent series resistance. The part is active in production status and RoHS3 compliant.

Substitute parts are identified when design requirements allow for tolerance variations, alternative manufacturers, or different packaging configurations while maintaining core electrical and mechanical compatibility. The primary substitution criteria for this capacitor category include capacitance value, voltage rating, package dimensions, and operating temperature range.

Substiute Parts

T491C226M016AT4021

KEMETIn Stock: 875T491C226M016AT4021 Datasheet

Current PartRFQ

T491C226K016AH

KEMETIn Stock: 1597T491C226K016AH Datasheet

Parametric EquivalentRFQ

T491C226K016AT2478

KEMETIn Stock: 1920T491C226K016AT2478 Datasheet

Parametric EquivalentRFQ

T491C226M016AT7280

KEMETIn Stock: 9682T491C226M016AT7280 Datasheet

Parametric EquivalentRFQ

TCKIC226CT

Cal-Chip Electronics, Inc.In Stock: 18997TCKIC226CT Datasheet

Parametric EquivalentRFQ

TCMIC226CT

Cal-Chip Electronics, Inc.In Stock: 19073TCMIC226CT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the T491C226M016AT4021 are grouped based on the following substitution criteria:

Primary Compatibility Parameters:

• Capacitance: 22 µF (exact match required)
• Voltage Rating: 16 V (exact match required)
• Package / Case: 2312 (6032 Metric) (exact match required)
• Dimensions: 0.236" L x 0.126" W, Height 0.110" max (exact match required)
• Operating Temperature: -55°C ~ 125°C (exact match required)
• Mounting Type: Surface Mount (exact match required)

Allowable Variation Parameters:

• Tolerance: ±20% or ±10% (tighter tolerance acceptable)
• ESR: 1.5 Ohm or 1 Ohm (lower ESR acceptable)
• Manufacturer: KEMET or Cal-Chip Electronics, Inc.
• RoHS Status: RoHS3 Compliant or RoHS non-compliant (application dependent)

All substitute parts maintain identical capacitance, voltage rating, package dimensions, and thermal specifications. Variations in tolerance and ESR represent acceptable engineering substitutions when circuit design permits.

Parameter Comparison

Engineering Selection Recommendations

KEMET T491C226K016AT2478 is the primary substitute when RoHS3 compliance is required and tighter tolerance specifications are acceptable. This part maintains identical electrical and mechanical characteristics to the main part while offering ±10% tolerance instead of ±20%.

KEMET T491C226M016AT7280 is an alternative substitute when ±20% tolerance is required and RoHS3 compliance is necessary. This part is functionally equivalent to the main part with identical ESR and tolerance specifications.

KEMET T491C226K016AH is suitable for applications where RoHS compliance is not a requirement and tighter tolerance is beneficial. This part features ±10% tolerance but does not meet RoHS3 standards.

Cal-Chip Electronics TCKIC226CT and TCMIC226CT are cross-manufacturer substitutes offering lower ESR (1 Ohm versus 1.5 Ohm) and RoHS3 compliance. TCKIC226CT provides ±10% tolerance while TCMIC226CT maintains ±20% tolerance. Both parts are mechanically and electrically compatible with identical package dimensions and thermal ratings.

Selection between substitute parts depends on specific design requirements regarding tolerance specification and regulatory compliance status. All listed substitutes maintain identical capacitance, voltage rating, package dimensions, and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can T491C226K016AT2478 replace T491C226M016AT4021 in all applications?

A: T491C226K016AT2478 is electrically and mechanically compatible. The primary difference is tolerance specification (±10% versus ±20%) and RoHS3 compliance. Applications requiring ±20% tolerance acceptance can use this substitute. Verify circuit design permits tighter tolerance operation.

Q: What is the difference between KEMET and Cal-Chip Electronics substitutes?

A: Both manufacturers provide 22 µF, 16 V, 2312 package tantalum capacitors with identical dimensions and operating temperature range. Cal-Chip parts feature 1 Ohm ESR compared to KEMET's 1.5 Ohm ESR. Lower ESR may benefit high-frequency applications or circuits sensitive to ripple current characteristics.

Q: Are all substitute parts RoHS3 compliant?

A: Four of five substitute parts are RoHS3 compliant: T491C226K016AT2478, T491C226M016AT7280, TCKIC226CT, and TCMIC226CT. T491C226K016AH is RoHS non-compliant. Verify regulatory requirements for your application before selection.

Q: Can I use a ±10% tolerance part where ±20% is specified?

A: Yes. Tighter tolerance specifications are acceptable substitutions. Parts with ±10% tolerance (T491C226K016AH, T491C226K016AT2478, TCKIC226CT) can replace the ±20% specified part. Verify circuit design does not depend on the wider tolerance band.

Q: What does ESR difference mean for circuit performance?

A: ESR (Equivalent Series Resistance) affects ripple current handling and frequency response. Cal-Chip parts with 1 Ohm ESR have lower resistance than KEMET parts with 1.5 Ohm ESR. Lower ESR reduces heat generation and improves performance in high-frequency or high-ripple-current applications.

Q: Are package dimensions identical across all substitutes?

A: Yes. All substitute parts use the 2312 (6032 Metric) package with dimensions 0.236" L x 0.126" W and maximum seated height of 0.110" (2.80mm). Direct board-level substitution is supported without layout modifications.

Q: What is Moisture Sensitivity Level 1?

A: MSL 1 indicates unlimited shelf life without moisture control requirements. All listed parts have MSL 1 rating, eliminating moisture-related handling constraints during storage and assembly.