KYOCERA AVX TAJ series, Molded Tantalum Capacitor, 33 µF ±20%, 4 V rated, 3.4 Ω ESR, 0805 (2012 Metric) case, -55°C to 125°C
| Parameter | Value |
|---|---|
| Type | Molded |
| Series | TAJ |
| Mounting | Surface Mount |
| ESR | 3.4Ohm |
| Voltage - rated | 4 V |
| Operating temperature | -55°C~125°C |
| Size (Dimension) | 0.081\" L x 0.053\" W (2.05mm x 1.35mm) |
| Height - seated | 0.059\" (1.50mm) |
| Package | Tape & Reel (TR) |
| Features | General Purpose |
| Tolerance | ±20% |
| Capacitance | 33 µF |
| Case | 0805 (2012 Metric) |
| Manufacturer size code | P |
The 3.4 Ω ESR is a key parameter for power rail decoupling — it limits the ripple current the part can handle before self-heating becomes a concern.
At 3.4 Ω, the ESR is higher than a typical MLCC of the same capacitance and voltage rating. For a 3.3 V rail, the 4 V rating gives 0.7 V of headroom — adequate for a regulated supply, but tight if the rail sees transients above 4 V. The molded case provides mechanical robustness during reflow and vibration.
The equivalent series resistance (ESR) is 3.4 Ω. This value sets the ripple current limit and the self-heating under load — for a 33 µF part at 4 V, it is typical for a molded tantalum in an 0805 case.
The evidence does not list a RoHS compliance status. Confirm with the manufacturer's datasheet or a compliance certificate at the time of ordering.
As a 33 µF, 4 V, ±20% molded tantalum in an 0805 case, it is functionally equivalent to other TAJ series parts with the same ratings. The 3.4 Ω ESR and -55°C to 125°C range match the standard TAJ parametric profile. Verify the footprint and height (1.50 mm seated) against your board clearance before substitution.