What risks should I check before replacing CA45A-B-16V-22UF-K?

Before replacing, you must check for: 1) Package compatibility, as some alternatives are in a different case size. 2) Tolerance, as many options have a wider ±20% tolerance. 3) ESR, as a higher or significantly lower value can impact circuit stability and performance.

CA45A-B-16V-22UF-K Alternatives, Datasheet & Cross Reference | NH

Finding a substitute for the CA45A-B-16V-22UF-K, a 22µF 16V tantalum polymer capacitor, involves matching the B-Case package and key electricals. Several options exist, from direct upgrades to functional alternatives that require careful review.

AI replacement insight

Package riskhigh

Several candidates are in a smaller 'A-Case' and are not drop-in replacements.

Electrical riskmedium

Many candidates have wider ±20% tolerance or different ESR values that must be validated in the application.

Can it be replaced directly?

Direct replacement for CA45A-B-16V-22UF-K should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

The best replacement is CA45A-B-20V-22UF-K, which is a direct upgrade from the same manufacturer with a higher voltage rating and identical package.

Main risk

The main risks when substituting are package mismatches requiring a board redesign, or parametric downgrades like wider tolerance and higher ESR that can affect circuit performance.

Recommended alternatives

A direct upgrade with a higher voltage rating (20V) and slightly lower ESR in the same package.

View details

Alternative comparison matrix

Feature / factor	CA45A-B-16V-22UF-K	CA45A-B-20V-22UF-K	CA45-B-20V-22UF-M	T521B226M025ATE100	Compatibility / risk
Package	3528-19	3528-19	B (3528-19)	3528-21	3528-19 / B (3528-19) / 3528-21 — Identical package and footprint.; CA45-B-20V-22UF-M: Pin-compatible B-Case package.; T521B226M025ATE100: Same footprint (3528) but taller (2.1mm vs 1.9mm).
Voltage	16V	20V	20V	25V	20V / 25V — Higher voltage rating provides more design margin.; CA45-B-20V-22UF-M: Higher voltage rating provides more margin.; T521B226M025ATE100: Significantly higher voltage rating.
Tolerance	±10%	±10%	±20%	±20%	±10% / ±20% — Tolerance matches the original part.; CA45-B-20V-22UF-M: Wider tolerance may impact circuit performance.; T521B226M025ATE100: Wider tolerance requires review.
Esr	2.2Ω	2.0Ω	2.0Ω	100mΩ	2.0Ω / 100mΩ — Slightly lower ESR is generally beneficial.; CA45-B-20V-22UF-M: Slightly lower ESR.; T521B226M025ATE100: Significantly lower ESR may alter circuit behavior.

Application & sourcing insights

Questions & answers

Verified drop-in options for CA45A-B-16V-22UF-K are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.