CA45-B-35V-2.2UF-K
XY (Zhenhua Xinyun)
Needs validationmedium risk
A higher voltage tantalum capacitor in a different package; requires board redesign.
Best Alternatives to CA45B-A-16V-2.2UF-K
Finding a replacement for the CA45B-A-16V-2.2UF-K tantalum capacitor requires careful review of package and electrical characteristics. While several alternatives exist, none are direct drop-in replacements.
AI replacement insight
Package riskhigh
All candidates have different packages (Case B, 0402, etc.) vs target's Case A, requiring PCB redesign.
Electrical riskmedium
MLCC candidates have different ESR and DC bias characteristics than the target Tantalum capacitor.
Can it be replaced directly?
No direct, pin-compatible replacement has been identified. All candidates require board layout changes and/or have different electrical technologies (MLCC vs. Tantalum).
Best replacement path
Upgrade to a higher voltage tantalum capacitor like CA45A-B-50V-2.2UF-K, but this requires a board layout change for the different package (Case B).
Main risk
The primary risk is the package mismatch across all candidates, requiring a PCB redesign. A secondary risk for MLCC options is the change in capacitor technology.
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | CA45B-A-16V-2.2UF-K | CA45-B-35V-2.2UF-K | CA45A-B-50V-2.2UF-K | HGC0402R5225K250NTEJ | Compatibility / risk |
|---|---|---|---|---|---|
| Package | A | 3528 (B-Case) | Case B | 0402 (1005 Metric) | 3528 (B-Case) / Case B / 0402 (1005 Metric) / 0805 (2012 metric) — Package is different, requires board redesign.; CA45A-B-50V-2.2UF-K: Package is different, requires board redesign.; HGC0402R5225K250NTEJ: Package is significantly different.; HGC0805R7225K500NSLJ: Package is significantly different. |
| Voltage | 16.0V | 35.0V | 50.0V | 25.0V | 35.0V / 50.0V / 25.0V — Higher voltage rating provides more margin.; CA45A-B-50V-2.2UF-K: Higher voltage rating provides more margin.; HGC0402R5225K250NTEJ: Higher voltage rating.; HGC0805R7225K500NSLJ: Higher voltage rating. |
| Technology | Tantalum - Polymer | Tantalum | Tantalum - Polymer | Ceramic | Tantalum / Tantalum - Polymer / Ceramic — Technology matches target.; CA45A-B-50V-2.2UF-K: Technology matches target.; HGC0402R5225K250NTEJ: Different technology (MLCC) has different electrical behavior.; HGC0805R7225K500NSLJ: Different technology (MLCC) has different electrical behavior. |
| Tolerance | 10.0% | - | 10.0% | - | 10.0% — Tolerance matches target. |
Application & sourcing insights
Questions & answers
The best functional alternatives are higher-voltage tantalum capacitors like CA45A-B-50V-2.2UF-K, but they require a new PCB layout due to a different package size.