Is there a pin-compatible replacement for T491C226K025AT?

No, a direct pin-compatible replacement for the T491C226K025AT in its 6032 C-Case package was not found in this analysis. All viable candidates require a modification to the printed circuit board layout.

What risks should I check before replacing T491C226K025AT?

The main risks are package mismatch, requiring a board redesign, and technology differences. If switching from Tantalum to an MLCC, you must evaluate DC bias voltage derating, ESR characteristics over frequency, and different failure modes.

T491C226K025AT Alternatives, Datasheet & Cross Reference | KEMET

Finding a substitute for the KEMET T491C226K025AT, a 22µF 25V Tantalum capacitor, involves considering alternatives with different packages. Both Tantalum upgrades and MLCC functional alternatives are available but require a PCB redesign.

AI replacement insight

Package riskhigh

All candidates have different footprints (D-Case, 1210) than the target's C-Case.

Electrical riskmedium

Switching to an MLCC requires careful review of DC bias derating, ESR curves, and failure modes.

Can it be replaced directly?

No direct drop-in replacement for T491C226K025AT has been identified, as all suitable alternatives have different package sizes.

Best replacement path

If a board redesign is possible, CC1210KKX7R8BB226 is a strong MLCC alternative, while T491D226K035AT is an upgrade within the same Tantalum family but in a larger package.

Main risk

The primary risk is the physical package mismatch, which necessitates a PCB layout change for any substitution.

Recommended alternatives

A higher voltage Tantalum capacitor from the same series, but in a larger package requiring a board redesign.

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Alternative comparison matrix

Feature / factor	T491C226K025AT	T491D226K035AT	CC1210KKX7R8BB226	Compatibility / risk
Package	6032-28 (C-Case)	7343-31 (D-Case)	1210 (3225 metric)	7343-31 (D-Case) / 1210 (3225 metric) — Candidate is physically larger and requires a different PCB footprint.; CC1210KKX7R8BB226: Candidate has a different footprint and requires a board redesign.
Voltage	25V	35V	25V	35V / 25V — Higher voltage rating provides more design margin.; CC1210KKX7R8BB226: matched
Esr	1.4Ω	700mΩ	-	700mΩ — Lower ESR is generally beneficial for ripple current and efficiency.
Capacitance	22µF	22µF	-	22µF — matched
Technology	Tantalum	-	MLCC (X7R)	MLCC (X7R) — Switching from Tantalum to MLCC requires reviewing DC bias, ESR, and failure modes.
Tolerance	±10%	-	±10%	±10% — matched
Temperature	-55°C to +125°C	-	-55°C to +125°C	-55°C to +125°C — matched

Application & sourcing insights

Questions & answers

The best alternative depends on your design constraints. If you can change the PCB layout, T491D226K035AT is an upgraded Tantalum option in a larger package, while CC1210KKX7R8BB226 is an MLCC with matching electricals in a smaller package.