CA45B-B-25V-10UF-K
Jiangsu Zhenhua Xinyun Electronics Co., Ltd.
Needs validationmedium risk
An electrical upgrade in a larger B-case (3528) package; not a drop-in replacement.
Best Alternatives to CA45B-A-16V-10uF-K
Finding a substitute for the CA45B-A-16V-10uF-K tantalum capacitor requires careful review. While some alternatives match the A-case package, they may have higher ESR. Other options offer superior electrical performance but come in a larger B-case package, requiring board layout changes.
AI replacement insight
Electrical riskmedium
Alternatives have different ESR and tolerance values that can affect circuit stability.
Package riskhigh
Many electrically suitable parts are in a different, larger package, requiring a PCB redesign.
Can it be replaced directly?
No direct, fully equivalent replacement has been identified. The closest form-fit options like T491A106M020AT have relaxed electrical parameters that require engineering validation.
Best replacement path
For a drop-in replacement, consider T491A106M020AT but verify the impact of its wider tolerance (±20%) and higher ESR (5Ω). For new designs, CA45B-B-25V-10UF-K is a strong electrical upgrade in a larger B-case package.
Main risk
The primary risk is a trade-off between physical compatibility (package size) and electrical performance (ESR, tolerance).
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | CA45B-A-16V-10uF-K | CA45B-B-25V-10UF-K | CA45A-B-16V-10uF-K | CA45A-B-25V-10uF-K | Compatibility / risk |
|---|---|---|---|---|---|
| Package | A (3216) | B (3528-19) | B | B | B (3528-19) / A (3216-18) — Larger package requires PCB layout change.; CA45A-B-16V-10uF-K: Larger package requires PCB layout change.; CA45A-B-25V-10uF-K: Larger package requires PCB layout change.; T491A106M020AT: Standard A-case matches target footprint. |
| Voltage | 16V | 25V | 16V | 25V | 25V / 16V / 20V — Higher voltage rating provides more margin.; CA45A-B-16V-10uF-K: Voltage rating matches.; CA45A-B-25V-10uF-K: Higher voltage rating provides more margin.; T491A106M020AT: Higher voltage rating provides more margin. |
| Esr | 3.0Ω | 1.4Ω | 2.8Ω | 3.0Ω | 1.4Ω / 2.8Ω / 3.0Ω / 5.0Ω — Lower ESR is a significant performance improvement.; CA45A-B-16V-10uF-K: Slightly lower ESR is a minor improvement.; CA45A-B-25V-10uF-K: ESR matches target.; T491A106M020AT: Higher ESR than target. |
| Tolerance | ±10% | ±10% | - | - | ±10% / ±20% — Tolerance matches.; T491A106M020AT: Wider tolerance may not be suitable for precision applications. |
Application & sourcing insights
Questions & answers
The best alternative depends on your priority. For the same footprint, KEMET's T491A106M020AT is an option but has wider tolerance and higher ESR. If you can change your PCB layout, CA45B-B-25V-10UF-K offers upgraded voltage and lower ESR in a larger package.