Is there a pin-compatible replacement for CA45A-B-10V-100UF-K?

CA45-B-10V-100uF-M shares the same B-case package and pinout, but it is a downgrade with higher ESR (4Ω vs 1.2Ω) and looser tolerance (±20% vs ±10%). Full electrical validation is required.

What risks should I check before replacing CA45A-B-10V-100UF-K?

Key risks are package size, ESR, and tolerance. Ensure the replacement fits the PCB footprint. Higher ESR can impact filtering performance and efficiency. Looser tolerance can affect circuit accuracy.

CA45A-B-10V-100UF-K Alternatives, Datasheet & Cross Reference | NH

CA45A-B-10V-100UF-K is a 100µF 10V tantalum capacitor in a B-case (3528). Finding a replacement requires matching package size and key electricals, but no direct drop-in has been found.

AI replacement insight

Package riskhigh

Most alternatives are in larger packages that will not fit the PCB footprint.

Electrical riskhigh

The only package-matched option has significantly worse ESR and tolerance.

Can it be replaced directly?

No direct, drop-in replacement with identical or better performance has been identified. The closest form-fit match, CA45-B-10V-100uF-M, is a significant electrical downgrade.

Best replacement path

Evaluate CA45-B-10V-100uF-M for its matching package, but test its higher ESR and weaker tolerance. If performance is critical, a board redesign for a C or D-case part may be needed.

Main risk

The main risk is a mismatch in either package size or key electrical parameters like ESR and tolerance. No single candidate matches on all critical aspects.

Recommended alternatives

Matches package and voltage, but is a downgrade in tolerance and ESR.

View details

Alternative comparison matrix

Feature / factor	CA45A-B-10V-100UF-K	CA45-B-10V-100uF-M	CA45-C-10V-100uF-K	CA45-D-16V-100uF-K	Compatibility / risk
Package	B	3528-21 (B)	C-Case (6032)	D (7.3mm x 4.3mm)	3528-21 (B) / C-Case (6032) / D (7.3mm x 4.3mm) — Package size matches target.; CA45-C-10V-100uF-K: Larger package, not a drop-in fit.; CA45-D-16V-100uF-K: Larger package, not a drop-in fit.
Voltage	10.0V	10.0V	10.0V	16.0V	10.0V / 16.0V — Voltage rating matches.; CA45-C-10V-100uF-K: Voltage rating matches.; CA45-D-16V-100uF-K: Higher voltage rating is a safe upgrade.
Tolerance	±10.0%	±20.0%	±10.0%	±10.0%	±20.0% / ±10.0% — Wider tolerance is a downgrade.; CA45-C-10V-100uF-K: Tolerance matches.; CA45-D-16V-100uF-K: Tolerance matches.
Esr	1.2 Ω	4.0 Ω	≤0.3 Ω	≤0.6 Ω	4.0 Ω / ≤0.3 Ω / ≤0.6 Ω — Significantly higher ESR requires validation.; CA45-C-10V-100uF-K: Lower ESR is an improvement.; CA45-D-16V-100uF-K: Lower ESR is an improvement.

Application & sourcing insights

Questions & answers

The best alternative depends on design flexibility. CA45-B-10V-100uF-M matches the package but has weaker performance. Other candidates offer better electricals but in larger packages that require a board redesign.