The **TAS225J035P1C** is a specific part number for a Solid Tantalum Capacitor, typically manufactured by companies like Cornell Dubilier (CDE). These capacitors are known for their high reliability and stable performance in demanding environments. ### 1. Technical Specifications | Parameter | Value / Description | | :--- | :--- | | **Capacitance** | 2.2 µF (Microfarads) | | **Tolerance** | ±5% (indicated by the 'J' in the part number) | | **Voltage Rating** | 35 VDC | | **Dielectric Material** | Tantalum Pentoxide ($Ta_2O_5$) | | **Package Type** | Radial (Axial leaded options also exist in the TAS series) | | **Operating Temp** | -55°C to +125°C | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying the component's characteristics: * **TAS**: Series identifier (Solid Tantalum, Hermetically Sealed or Molded). * **225**: Capacitance code. The first two digits (22) are significant figures; the third (5) is the multiplier ($10^5$ pF). $2,200,000\text{ pF} = 2.2\text{ µF}$. * **J**: Tolerance code. J represents ±5%. * **035**: Voltage rating. Represents 35 Volts. * **P**: Case size/Style code. * **1C**: Packaging/Lead material suffix. --- ### 3. Key Features and Applications #### Features * **Stability:** Tantalum capacitors offer very stable capacitance over time and temperature compared to aluminum electrolytic capacitors. * **Hermetic Seal:** The TAS series often features a hermetic seal (metal case), which protects the internal electrolyte from drying out or being affected by humidity. * **Low Leakage:** These parts are designed for low DC leakage current, making them ideal for precision timing circuits. #### Typical Applications 1. **Filtering:** Used in power supply circuits to smooth voltage fluctuations. 2. **Bypassing:** Diverting high-frequency noise to ground in sensitive analog circuits. 3. **Military & Aerospace:** Due to the wide temperature range and durability of the TAS series, they are frequently used in ruggedized equipment. 4. **Coupling/Decoupling:** Blocking DC components while allowing AC signals to pass in audio or signal processing. --- ### 4. Comparison with Alternative Dielectrics | Feature | Tantalum (TAS) | Aluminum Electrolytic | Ceramic (MLCC) | | :--- | :--- | :--- | :--- | | **Longevity** | Very High (No dry-out) | Medium (Electrolyte dries) | High | | **Size** | Small for high C | Large | Very Small | | **Failure Mode** | Short circuit (Can be volatile) | Open circuit/Leaking | Short circuit | | **Cost** | High | Low | Medium |