The part number **DM05DA151JO3-SA-R02** refers to a high-precision **Mica Capacitor**. These components are widely used in RF (Radio Frequency) and high-frequency applications due to their exceptional stability and low loss. --- ### 1. Technical Specifications Below is a breakdown of the typical technical parameters for this specific part series: | Parameter | Value / Specification | | :--- | :--- | | **Capacitance** | 150 pF (151 code) | | **Tolerance** | ±5% (J code) | | **Voltage Rating** | 500V DC | | **Dielectric Material** | Silver Mica | | **Operating Temperature** | -55°C to +125°C | | **Termination Style** | Radial Leaded | | **Case Style** | Dipped Mica (Size DM05) | --- ### 2. Part Number Breakdown The alphanumeric code provides specific details about the component's construction: * **DM05:** Refers to the physical package size and body dimensions (Standard Dipped Mica size). * **DA:** Indicates the voltage rating (commonly associated with 500V in this series). * **151:** The capacitance value. `15` + `1` zero = **150pF**. * **J:** Tolerance code. `J` stands for **±5%**. * **O3:** Specific lead spacing or manufacturing internal code. * **SA:** Typically denotes the lead finish or specific coating (e.g., Solderable). * **R02:** Packaging or Revision suffix (often refers to Bulk or Tape & Reel specifics). --- ### 3. Key Characteristics and Applications #### Key Characteristics * **High Stability:** Extremely low capacitance change over time and temperature. * **Low Dissipation:** Excellent "Q" factor, making them ideal for filter circuits. * **Precision:** Mica is a natural mineral that allows for very tight tolerances compared to ceramic capacitors. * **Voltage Endurance:** Designed to handle high-voltage pulses without degradation. #### Common Applications 1. **RF Oscillators:** Used to maintain frequency stability in radio transmitters. 2. **Tuned Circuits:** Ideal for LC (Inductor-Capacitor) resonance tanks. 3. **Coupling/Decoupling:** Used in high-frequency signal paths where low distortion is required. 4. **Military & Aerospace:** Used in legacy and high-reliability communications equipment. --- ### 4. Comparisons | Feature | Mica (DM05) | Ceramic (MLCC) | | :--- | :--- | :--- | | **Stability** | Excellent | Varies (X7R/Y5V are poor) | | **Voltage Range** | Generally High (500V+) | Wide range | | **Size** | Larger (Leaded) | Extremely Small (SMD) | | **Cost** | High | Low |