The part number **DM05CE100JO3-ST-R02** refers to a high-precision Mica capacitor manufactured by **Cornell Dubilier Electronics (CDE)**. These components are known for their extreme stability, high reliability, and low loss in RF and precision timing circuits. --- ### 1. Component Specifications Below is a breakdown of the technical characteristics of this specific part: | Parameter | Specification | | :--- | :--- | | **Capacitance** | 10 pF (Picofarads) | | **Tolerance** | ±5% (indicated by 'J') | | **Voltage Rating** | 500 VDC | | **Dielectric Material** | Silver Mica | | **Operating Temperature** | -55°C to +125°C | | **Package Type** | Radial Leaded (Dipped) | | **Lead Spacing** | ~0.120 inches (3.05 mm) | --- ### 2. Part Number Decoder The alphanumeric code follows the CDE standard naming convention: * **DM05**: Refers to the physical case size and style (Standard Dipped Mica). * **CE**: Temperature coefficient characteristic. * **100**: The capacitance value (10 + 0 zeros = 10pF). * **J**: Tolerance code (±5%). * **O3**: Voltage rating (500V). * **ST**: Lead style/finish (usually indicates straight leads or specific plating). * **R02**: Packaging/Revision suffix (typically indicates RoHS compliance or bulk/tape packaging). --- ### 3. Key Advantages of Silver Mica Capacitors Silver Mica capacitors are used instead of ceramic or electrolytic types in specific scenarios due to these properties: 1. **High Stability:** Their capacitance changes very little over time or with temperature fluctuations. 2. **Low Loss (High Q):** They have a very high "Quality Factor," meaning they dissipate very little energy, making them ideal for high-frequency (RF) applications. 3. **High Voltage Support:** Despite their small size, they can handle significant DC voltage (500V in this case). 4. **Tight Tolerances:** They are often used in filters where precise values are critical. --- ### 4. Common Applications * **RF Oscillators:** Maintaining frequency stability in radio transmitters. * **Tuning Circuits:** Used in high-precision resonant circuits. * **Coupling/Bypassing:** In high-voltage power supplies or signal paths where stability is paramount. * **Military/Aerospace:** Due to their ability to withstand harsh environments.