
KEMET
A form-fit-function match with higher voltage rating (6.3V) and slightly higher ESR (40mΩ).
The Panasonic 2R5TPE330MAZB is a 330µF, 2.5V polymer tantalum capacitor in a compact B2 package. Alternatives exist with similar form factors but may have different electrical parameters like voltage or ESR that require review.
Several alternatives exist in the same B2 (3.5x2.8mm) package.
Candidates may have different capacitance or ESR values requiring circuit review.
Multiple major manufacturers produce similar polymer tantalum capacitors.
Direct replacement for 2R5TPE330MAZB should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
The KEMET T520B337M006ATE040 offers a higher voltage rating in the same package, making it a robust upgrade path, though its slightly higher ESR should be checked.
The main risks involve changes in capacitance or ESR. Lower capacitance can affect circuit stability, while higher ESR can impact efficiency and ripple voltage.

KEMET
A form-fit-function match with higher voltage rating (6.3V) and slightly higher ESR (40mΩ).
| Feature / factor | 2R5TPE330MAZB | T520B337M006ATE040 | 4TPE220MAZB | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | B2 | 3528-21 (B case) | B2 | 3528-21 (B case) / B2 — Dimensionally equivalent (3.5x2.8x1.9mm).; 4TPE220MAZB: Identical package. | |
| Voltage | 2.5V | 6.3V | 4V | 6.3V / 4V — Higher voltage rating provides more design margin.; 4TPE220MAZB: Higher voltage rating provides more margin. | |
| Capacitance | 330µF | 330µF | 220µF | 330µF / 220µF — matched; 4TPE220MAZB: Lower capacitance requires circuit validation. | |
| Esr | 35mΩ | 40mΩ | 35mΩ | 40mΩ / 35mΩ — Slightly higher ESR may affect ripple performance.; 4TPE220MAZB: ESR matches target. | |
| Tolerance | ±20% | ±20% | - | ±20% — matched |
Verified drop-in options for 2R5TPE330MAZB 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.