Is there a pin-compatible replacement for T491A106K016AT?

No, there are no pin-compatible replacements for T491A106K016AT among the candidates reviewed. All alternatives have different package dimensions, which means they will not fit on the same PCB footprint without a layout modification.

What risks should I check before replacing T491A106K016AT?

Before replacing, you must check: 1. Physical Fit: All alternatives have a different package size. 2. Electrical Characteristics: If considering an MLCC, verify the impact of DC bias on capacitance, ESR, and leakage current. 3. Voltage Derating: Ensure the replacement's voltage rating is appropriate for your application.

T491A106K016AT Alternatives, Datasheet & Cross Reference | KEMET

Finding a substitute for the KEMET T491A106K016AT 10µF 16V tantalum capacitor requires careful consideration. While no direct pin-compatible replacements exist, several functional alternatives are available but involve either a larger package size or a change in capacitor tec...

AI replacement insight

Package riskhigh

No candidates match the target's 3216-18 A-Case package. All require a layout change.

Electrical riskhigh

Switching to MLCCs introduces risks from DC bias, different ESR, and leakage current.

Sourcing risklow

The target and several alternatives are from major manufacturers and are actively produced.

Can it be replaced directly?

No direct, pin-compatible replacements were found. All identified alternatives have a different package size or use a different capacitor technology (MLCC vs. Tantalum).

Best replacement path

If board space allows, T491B106K025AT from the same KEMET series offers a voltage upgrade in a slightly larger package. A technology change to MLCC is possible but carries high risk.

Main risk

The primary risks are physical package mismatch, requiring a board redesign, and for MLCC options, significant electrical differences due to the change in capacitor technology.

Recommended alternatives

Functional alternate with higher voltage but larger B-case package (3528-21).

View details

Alternative comparison matrix

Feature / factor	T491A106K016AT	T491B106K025AT	T491D106K050AT	GRM32ER71H106KA12L	Compatibility / risk
Package	3216-18 (A-Case)	3528-21 (B-Case)	7343-31 (D-Case)	1210 (3225 Metric)	3528-21 (B-Case) / 7343-31 (D-Case) / 1210 (3225 Metric) — Candidate is larger; requires PCB layout change.; T491D106K050AT: Candidate is significantly larger; requires PCB layout change.; GRM32ER71H106KA12L: Different footprint requires PCB layout change.
Voltage	16V	25V	50V	50V	25V / 50V — Higher voltage rating provides increased design margin.; T491D106K050AT: Higher voltage rating provides significant design margin.; GRM32ER71H106KA12L: Higher voltage rating.
Capacitance	10µF	10µF	10µF	10µF	10µF — matched; T491D106K050AT: matched; GRM32ER71H106KA12L: Nominal match, but MLCC capacitance decreases with DC bias.
Esr	3.0 Ω	2.0 Ω	800mΩ	-	2.0 Ω / 800mΩ — Lower ESR may improve circuit performance.; T491D106K050AT: Significantly lower ESR may improve circuit performance.
Temperature	-55°C to +125°C	-55°C to +125°C	-	-	-55°C to +125°C — matched
Technology	Tantalum	-	-	MLCC (Ceramic)	MLCC (Ceramic) — Different technology (MLCC vs Tantalum) affects ESR, leakage, and failure mode.
Dielectric	Tantalum (MnO2)	-	-	X7R	X7R — Affects temperature stability and DC bias characteristics.

Application & sourcing insights

Questions & answers

The best alternative depends on your design constraints. If you can change the PCB layout, T491B106K025AT is a good option from the same series with a higher voltage rating. If you cannot change the layout, no suitable alternative was found.