Needs validationmedium risk
High-voltage MLCC that reduces DC bias risk, but package and ESR still require validation.
Best Alternatives to CA45-B-35V-4.7UF-K
Finding a substitute for the CA45-B-35V-4.7UF-K Tantalum capacitor involves considering MLCCs as functional alternatives. This requires careful engineering review, as electrical properties like ESR and DC bias, as well as the physical package, are different.
AI replacement insight
Electrical riskhigh
ESR and DC bias differences between Tantalum and MLCC technology require a full circuit redesign or validation.
Package riskmedium
No candidate matches the Tantalum Case B footprint, requiring PCB layout changes or careful pad-size validation.
Can it be replaced directly?
No, there is no direct, pin-compatible replacement for CA45-B-35V-4.7UF-K among the candidates reviewed. All are MLCCs with different packages and critical electrical properties than the target Tantalum capacitor.
Best replacement path
Use a high-voltage (50V+) X7R or X7S MLCC to minimize capacitance loss from DC bias, such as TDK's C3225X7S2A475KT000N. However, you must validate circuit stability with the much lower ESR.
Main risk
Switching from Tantalum to an MLCC can cause circuit instability (oscillation) due to the MLCC's very low ESR, and significant loss of effective capacitance due to the DC bias effect.
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | CA45-B-35V-4.7UF-K | C3225X7S2A475KT000N | CGA4J1X7R1H475KT0Y0N | TCC1206X5R475K500HT | Compatibility / risk |
|---|---|---|---|---|---|
| Technology | Tantalum | MLCC (X7S) | MLCC (X7R) | MLCC (X5R) | MLCC (X7S) / MLCC (X7R) / MLCC (X5R) — Different ESR, DC bias, and failure modes. Requires circuit validation.; CGA4J1X7R1H475KT0Y0N: Different ESR, DC bias, and failure modes. Requires circuit validation.; TCC1206X5R475K500HT: Different ESR, DC bias, and failure modes. Requires circuit validation.; HGC0805R5475K500NSLJ: Different ESR, DC bias, and failure modes. Requires circuit validation. |
| Package | Case B | 1210 | 0805 | 1206 | 1210 / 0805 / 1206 — Closer in size but not a direct fit for Case B (3528).; CGA4J1X7R1H475KT0Y0N: Significantly smaller than Case B (3528). Not a form-fit replacement.; TCC1206X5R475K500HT: Not a form-fit replacement for Case B (3528).; HGC0805R5475K500NSLJ: Significantly smaller than Case B (3528). Not a form-fit replacement. |
| Voltage | 35V | 100V | 50V | 50V | 100V / 50V — High voltage rating significantly reduces DC bias capacitance loss.; CGA4J1X7R1H475KT0Y0N: Higher voltage rating provides more margin.; TCC1206X5R475K500HT: Higher voltage rating provides more margin.; HGC0805R5475K500NSLJ: Higher voltage rating provides more margin. |
| Temperature | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C | -55°C to +85°C | -55°C to +125°C / -55°C to +85°C — X7S matches temp range but has wider capacitance tolerance (±22%).; CGA4J1X7R1H475KT0Y0N: X7R dielectric matches target's temperature range.; TCC1206X5R475K500HT: X5R dielectric has a narrower operating temperature range.; HGC0805R5475K500NSLJ: X5R dielectric has a narrower operating temperature range. |
Application & sourcing insights
Questions & answers
The best alternatives are high-voltage MLCCs like the TDK C3225X7S2A475KT000N (100V) or CGA4J1X7R1H475KT0Y0N (50V, X7R). These require full engineering review for ESR, DC bias, and package differences.