Is there a pin-compatible replacement for CA45A-B-20V-22UF-K?

No drop-in, pin-compatible replacement is confirmed. CA45A-B-16V-22UF-K shares the package but has a lower voltage rating, posing a high risk.

What risks should I check before replacing CA45A-B-20V-22UF-K?

Key risks include: 1) ensuring the replacement's voltage rating is 20V or higher, 2) verifying package dimensions are compatible, and 3) confirming the circuit can handle a wider tolerance.

CA45A-B-20V-22UF-K Alternatives, Datasheet & Cross Reference | NH

Finding a substitute for the CA45A-B-20V-22UF-K 22µF 20V tantalum polymer capacitor requires checking voltage, tolerance, and package. Alternatives exist but may involve trade-offs.

AI replacement insight

Electrical riskhigh

Candidates have lower voltage, wider tolerance, or different dielectric.

Package riskmedium

Some candidates have slight height differences or unverified case codes.

Sourcing risklow

Alternatives are available from multiple manufacturers.

Can it be replaced directly?

No direct pin-to-pin replacement has been identified. All candidates require engineering review for parametric differences or potential risks.

Best replacement path

The KEMET T521B226M025ATE100 offers an upgrade in voltage (25V) and ESR (100mΩ), but requires verifying the impact of its wider ±20% tolerance.

Main risk

The main risks are substituting with a lower voltage part or using a capacitor with a different dielectric (e.g., MnO2 Tantalum), which affects reliability.

Recommended alternatives

Same series and package, but with a lower 16V rating. Requires voltage verification.

View details

Alternative comparison matrix

Feature / factor	CA45A-B-20V-22UF-K	CA45A-B-16V-22UF-K	T521B226M025ATE100	Compatibility / risk
Voltage	20V	16V	25V	16V / 25V — Lower voltage rating is a significant downgrade risk.; T521B226M025ATE100: Higher voltage rating provides more margin.
Package	3528-19	3528-19	3528-21	3528-19 / 3528-21 — Package matches target.; T521B226M025ATE100: Slightly taller package (2.1mm vs 1.9mm).
Capacitance	22µF	22µF	-	22µF — Capacitance matches target.
Esr	2.0Ω	2.2Ω	100mΩ	2.2Ω / 100mΩ — Slightly higher ESR.; T521B226M025ATE100: Significantly lower ESR is a major improvement.
Tolerance	±10%	-	±20%	±20% — Wider tolerance may affect circuit performance.

Application & sourcing insights

Questions & answers

T521B226M025ATE100 by KEMET is a strong candidate, offering higher voltage and lower ESR. However, its wider tolerance (±20%) must be acceptable for your application.