Is there a pin-compatible replacement for T491A225K035AT?

No direct pin-compatible replacement exists because all candidates are MLCCs, which are functionally different from the target Tantalum capacitor. GCM31CR71H225KA55K is mechanically compatible (form-fit), but its electrical behavior must be verified in your application.

What risks should I check before replacing T491A225K035AT?

The main risk is the technology change from polarized Tantalum to non-polarized MLCC. You must verify the impact on DC bias capacitance loss, ESR, inrush current handling, and potential failure modes. Also, check package size if considering non-1206 alternatives.

T491A225K035AT Alternatives, Datasheet & Cross Reference | KEMET

T491A225K035AT is a 2.2µF 35V Tantalum capacitor in a 1206 package. While no direct Tantalum replacements were found, several MLCC alternatives exist. These require careful engineering review due to the difference in capacitor technology.

AI replacement insight

Electrical riskhigh

MLCCs have different DC bias, ESR, and failure characteristics than Tantalum caps.

Package risklow

Form-fit 1206 MLCCs are available, but some alternatives are in larger packages.

Sourcing risklow

MLCCs are widely available from multiple vendors, potentially improving supply chain resilience.

Can it be replaced directly?

No direct, drop-in replacement for T491A225K035AT was found. All potential alternatives are MLCCs, which have different electrical properties than the target Tantalum capacitor.

Best replacement path

The best path is to consider a form-fit MLCC like GCM31CR71H225KA55K, which matches the package and key ratings, but requires full engineering validation due to the technology change.

Main risk

The primary risk is the technology change from a polarized Tantalum capacitor to a non-polarized MLCC, which impacts circuit behavior and reliability.

Recommended alternatives

Form-fit match with upgraded voltage, but technology differs (MLCC vs Tantalum). Engineering review is essential.

View details

Alternative comparison matrix

Feature / factor	T491A225K035AT	GCM31CR71H225KA55K	GCM31CC72A225KE02L	CC1210KKX7R9BB225	Compatibility / risk
Technology	Tantalum (polarized)	MLCC (non-polarized)	MLCC (non-polarized)	MLCC (non-polarized)	MLCC (non-polarized) — Target is polarized Tantalum. Requires circuit validation.; GCM31CC72A225KE02L: Target is polarized Tantalum. Requires circuit validation.; CC1210KKX7R9BB225: Target is polarized Tantalum. Requires circuit validation.
Package	A Case (3216-18)	1206 (3216 metric)	1206 (3216 metric)	1210 (3225 metric)	1206 (3216 metric) / 1210 (3225 metric) — Candidate package matches target case code.; GCM31CC72A225KE02L: Candidate package matches target case code.; CC1210KKX7R9BB225: Larger package. May not fit on 1206 pads.
Voltage	35V	50V	100V	50V	50V / 100V — Higher voltage rating provides more margin.; GCM31CC72A225KE02L: Significantly higher voltage rating.; CC1210KKX7R9BB225: Higher voltage rating provides more margin.
Temperature	-55°C to +125°C	-55°C to +125°C	-	-	-55°C to +125°C — Operating temperature range matches.
Dielectric	Tantalum Pentoxide	X7R	X7S	-	X7R / X7S — Stable dielectric, but check DC bias effects.; GCM31CC72A225KE02L: Check DC bias effects; X7S may have more capacitance droop than X7R.
Manufacturer	KEMET	-	-	Yageo	Yageo — Cross-vendor alternative.

Application & sourcing insights

Questions & answers

The best alternative is likely GCM31CR71H225KA55K. It matches the 1206 package, 2.2µF capacitance, 10% tolerance, and has a higher 50V rating. However, it is an MLCC, not a Tantalum capacitor, so engineering validation is essential.