Is there a pin-compatible replacement for CA45-A-25V-4.7uF-K?

No direct pin-compatible replacement has been confirmed. While some candidates like TCC1206X5R475K500HT share the same 1206 package, they use a different capacitor technology (MLCC) which has significantly different electrical properties and a lower temperature rating, requiring careful engineering review.

What risks should I check before replacing CA45-A-25V-4.7uF-K?

Before replacing, check three main risks: 1) Package mismatch, as many alternatives are in different sizes. 2) Technology change, as switching from Tantalum to MLCC introduces DC bias effects and different ESR. 3) Temperature rating, as many MLCCs have a lower max operating temperature (e.g., 85°C vs 125°C).

CA45-A-25V-4.7uF-K Alternatives, Datasheet & Cross Reference | NH

Find functional alternatives and upgrade paths for the XY CA45-A-25V-4.7uF-K, a 4.7µF 25V tantalum capacitor in a Case A package. Review key differences in package, technology, and electrical parameters before substitution.

AI replacement insight

Package riskhigh

Several candidates have different package sizes (Case B, 0805) and will not fit the PCB.

Electrical riskmedium

Switching from Tantalum to MLCC or Polymer changes ESR, leakage, and DC bias characteristics.

Can it be replaced directly?

No direct pin-for-pin replacement has been identified. The closest candidates have differences in technology (Tantalum Polymer, MLCC) or package size, requiring engineering review.

Best replacement path

The best path is an upgrade to a Tantalum Polymer capacitor like CA45B-A-25V-4.7UF-K, which offers the same package and superior ESR, but requires verifying circuit compatibility with the new technology.

Main risk

The main risks involve package mismatches requiring PCB redesign, or technology changes (e.g., to MLCC) which introduce new behaviors like DC bias capacitance loss and lower temperature ratings.

Recommended alternatives

Same package and ratings, but uses Tantalum Polymer technology which offers lower ESR. Review required.

View details

Alternative comparison matrix

Feature / factor	CA45-A-25V-4.7uF-K	CA45B-A-25V-4.7UF-K	TCC1206X5R475K500HT	Compatibility / risk
Package	A (3216)	3216-16 (Case A)	1206	3216-16 (Case A) / 1206 — Package size matches target's Case A (3216).; TCC1206X5R475K500HT: Package size matches target's Case A (3216 metric).
Technology	Tantalum	Tantalum Polymer	Ceramic (MLCC)	Tantalum Polymer / Ceramic (MLCC) — Polymer offers lower ESR but may have different leakage/stability.; TCC1206X5R475K500HT: MLCCs have DC bias derating and different failure modes.
Esr	6.0 Ω	1.2 Ω	-	1.2 Ω — Significantly lower ESR is an upgrade.
Voltage	25.0 V	25.0 V	50.0 V	25.0 V / 50.0 V — Voltage rating matches.; TCC1206X5R475K500HT: Higher voltage rating provides more margin.
Temperature	-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 — Operating temperature range matches.; TCC1206X5R475K500HT: Reduced maximum operating temperature.

Application & sourcing insights

Questions & answers

The best alternative is CA45B-A-25V-4.7UF-K. It shares the same package, voltage, and capacitance, with an improved ESR. However, it uses Tantalum Polymer technology, so you must verify its impact on your circuit's stability and leakage current.