The part number **DM05FA151JO3-SA-R02** refers to a high-precision **Mica Capacitor** manufactured by Cornell Dubilier (CDE). These components are known for their exceptional stability and reliability in RF (Radio Frequency) and high-frequency applications. --- ## 1. Technical Specifications | Parameter | Value | | :--- | :--- | | **Capacitance** | 150 pF (Picofarads) | | **Tolerance** | ±5% (indicated by 'J') | | **Voltage Rating** | 500 VDC | | **Dielectric Material** | Silver Mica | | **Operating Temperature** | -55°C to +125°C | | **Case Type** | Dipped Mica (Radial Leads) | | **Termination** | Standard Lead (usually Sn/Ag/Cu or similar) | --- ## 2. Key Features and Characteristics ### High Stability Silver mica capacitors are renowned for their extremely low drift over time. They maintain their capacitance value even under fluctuating environmental conditions, making them ideal for timing circuits. ### Low Loss (High Q Factor) These capacitors exhibit very low ESR (Equivalent Series Resistance) and high "Q" (Quality Factor). This makes them efficient in high-frequency power applications where heat dissipation must be minimized. ### Voltage Handling With a **500V** rating, this specific part is designed for high-voltage environments where standard ceramic capacitors might fail or exhibit significant capacitance change due to voltage stress. --- ## 3. Typical Applications * **RF Oscillators:** Used to set precise frequencies in radio transmitters and receivers. * **Filter Circuits:** Essential in high-performance low-pass, high-pass, and band-pass filters. * **Snubber Circuits:** Employed in power supplies to suppress voltage spikes. * **Audio Equipment:** Sometimes used in high-end audio crossovers and pre-amps for their linear characteristics. --- ## 4. Part Number Breakdown (Partial) | Code Segment | Meaning | | :--- | :--- | | **DM** | Dipped Mica Series | | **05** | Case Size / Body Dimensions | | **151** | Capacitance Code (15 followed by one 0 = 150) | | **J** | Tolerance (±5%) | | **O3** | Voltage (O3 corresponds to 500V) |