Is there a pin-compatible replacement for CA45B-B-50V-1UF-K?

No direct pin-compatible replacement has been identified among the ceramic capacitor candidates. All reviewed options have different packages that are not physically compatible with the target's 3528-19 footprint.

What risks should I check before replacing CA45B-B-50V-1UF-K?

Key risks include: 1) Package mismatch requiring a PCB redesign. 2) Technology change from Tantalum to Ceramic, which affects ESR and can cause instability. 3) DC bias effect, where the ceramic capacitor's effective capacitance decreases under voltage.

CA45B-B-50V-1UF-K Alternatives, Datasheet & Cross Reference | NH

Finding a replacement for the CA45B-B-50V-1UF-K tantalum capacitor involves considering functional alternatives like ceramic capacitors (MLCCs). While MLCCs offer similar core ratings, they require careful engineering review due to differences in package, electrical behavior, and polarity.

AI replacement insight

Package riskhigh

Incompatible package requires a new PCB layout.

Electrical riskhigh

Different technology (Tantalum vs. MLCC) affects ESR and DC bias.

Firmware risklow

Not applicable for a passive component.

Can it be replaced directly?

No, there are no direct pin-compatible replacements among the reviewed ceramic capacitor candidates. The target is a tantalum capacitor in a 3528-19 package, while candidates are MLCCs in smaller, incompatible packages.

Best replacement path

The best path is to find another tantalum capacitor in the same 3528-19 (Case B) package. If unavailable, using a ceramic capacitor is possible but requires a PCB redesign and circuit validation.

Main risk

The main risks are the physical package mismatch requiring a new PCB layout, and the electrical differences between tantalum and ceramic capacitors, especially capacitance drop under DC voltage (DC bias) and lower ESR, which can affect circuit stability.

Recommended alternatives

A functional alternative in a common 0805 package, but requires board and circuit changes due to different technology.

View details

Alternative comparison matrix

Feature / factor	CA45B-B-50V-1UF-K	TCC0805X7R105K500DT	TCC1206X7R105K500HT	Compatibility / risk
Package	3528-19 (B)	0805	1206 (3216 Metric)	0805 / 1206 (3216 Metric) — Requires PCB redesign, not a drop-in replacement.; TCC1206X7R105K500HT: Requires PCB redesign, not a drop-in replacement.
Technology	Tantalum	Ceramic (MLCC)	Ceramic (MLCC)	Ceramic (MLCC) — Verify circuit stability (ESR) and DC bias effects.; TCC1206X7R105K500HT: Verify circuit stability (ESR) and DC bias effects.
Capacitance	1µF	1µF (nominal)	1µF (nominal)	1µF (nominal) — Effective capacitance will be lower under DC voltage.; TCC1206X7R105K500HT: Effective capacitance will be lower under DC voltage.
Voltage	50V	50V	50V	50V — No voltage margin.; TCC1206X7R105K500HT: No voltage margin.
Temperature	Not specified	-	-55°C to +125°C	-55°C to +125°C — Candidate has standard X7R range.

Application & sourcing insights

Questions & answers

The best alternative is another 1µF, 50V tantalum capacitor in a 3528-19 (Case B) package. If you must use a ceramic capacitor, parts like TCC1206X7R105K500HT are functional alternatives but require significant design changes.