CA45-A-25V-4.7uF-K
XY (Zhenhua Xinyun)
Needs validationhigh risk
Form-fit compatible but has much higher ESR, posing a performance downgrade risk. Verify application requirements.
Best Alternatives to CA45B-A-25V-4.7UF-K
Finding a substitute for the CA45B-A-25V-4.7UF-K 4.7µF 25V tantalum polymer capacitor requires careful review of package, ESR, and technology. While form-fit options exist, performance differences are significant.
AI replacement insight
Electrical riskhigh
ESR and technology mismatches are critical and can affect circuit stability and performance.
Package riskmedium
Some candidates have different footprints, requiring PCB changes. Form-fit options exist but have electrical risks.
Sourcing risklow
Functional alternatives are available from multiple vendors, though direct replacements are scarce.
Can it be replaced directly?
No direct, risk-free replacement is identified among the candidates. All options have significant electrical or mechanical differences requiring engineering validation.
Best replacement path
Search for Tantalum Polymer capacitors from other vendors in a 1206/Case-A package with ESR below 2Ω and a 25V or higher rating.
Main risk
The primary risk is performance degradation due to significantly higher ESR or different capacitor technology (e.g., MLCC DC bias effects).
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | CA45B-A-25V-4.7UF-K | CA45-A-25V-4.7uF-K | CA45-B-35V-4.7UF-K | TCC1206X5R475K500HT | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 3216-16 (Case A) | A | Case B | 1206 | A / Case B / 1206 — Package code matches target's case.; CA45-B-35V-4.7UF-K: Larger footprint, requires layout change.; TCC1206X5R475K500HT: Package footprint matches target. |
| Esr | 1.2 Ω | 6.0 Ω | 4 Ω | - | 6.0 Ω / 4 Ω — Much higher ESR (standard vs polymer tantalum).; CA45-B-35V-4.7UF-K: Significantly higher ESR, performance degradation. |
| Technology | Tantalum Polymer | Standard Tantalum | - | MLCC (X5R) | Standard Tantalum / MLCC (X5R) — Target is Tantalum Polymer, which has lower ESR.; TCC1206X5R475K500HT: Different technology with DC bias derating. |
| Voltage | 25V | 25V | 35V | 50V | 25V / 35V / 50V — Voltage rating matches.; CA45-B-35V-4.7UF-K: Higher voltage rating provides more margin.; TCC1206X5R475K500HT: Higher voltage rating. |
| Capacitance | 4.7µF ±10% | - | 4.7µF ±10% | - | 4.7µF ±10% — Capacitance and tolerance match. |
| Temperature | -55°C to +125°C | - | - | -55°C to +85°C | -55°C to +85°C — Reduced maximum operating temperature. |
Application & sourcing insights
Questions & answers
No direct drop-in replacement was found. The closest options require careful engineering review. CA45-A-25V-4.7uF-K has the same package but much higher ESR. TCC1206X5R475K500HT is a form-fit MLCC with different electrical behavior.