The part number **DM19CC100DO3-SA-R02** refers to a high-precision silver mica capacitor manufactured by **Cornell Dubilier Electronics (CDE)**. These components are specifically designed for high-stability applications where temperature changes must not affect the capacitance significantly. --- ### 1. Technical Specifications | Parameter | Specification | Details | |:---|:---|:---| | **Capacitance** | 10 pF | Pico-Farads | | **Tolerance** | ±0.5 pF | Designated by "D" in the code | | **Voltage Rating** | 500 VDC | High voltage handling capability | | **Dielectric Type** | Silver Mica | High stability, low loss | | **Case Style** | DM19 | Standardized mica capacitor dimensions | | **Temperature Range** | -55°C to +125°C | Industrial/Military grade reliability | | **Termination** | Radial Leads | Solder-coated copper clad steel | --- ### 2. Breakdown of the Part Number * **DM19**: Identifies the physical size and case style (Standard Dipped Mica). * **CC**: Represents the Temperature Coefficient (Stability characteristics). * **100**: The capacitance code. The first two digits are significant (10) and the third is the multiplier ($10^0$). Result: **10 pF**. * **D**: The tolerance code. For values under 10pF, "D" typically represents **±0.5 pF**. * **O3**: Indicates the operating voltage (O3 corresponds to **500V** in the CDE naming convention). * **SA**: Specific internal manufacturing or lead finish codes (often "Straight" leads). * **R02**: Revision or specific packaging/lead spacing designation. --- ### 3. Key Features and Applications #### Why Silver Mica? Silver mica capacitors are used instead of ceramic or electrolytic capacitors when precision and high frequency are involved. * **High Q Factor:** Very low electrical losses, making them ideal for RF (Radio Frequency) circuits. * **Low Drift:** The capacitance value remains extremely steady over time. * **Voltage Robustness:** Capable of handling high surges and high-frequency voltages without degradation. #### Common Use Cases 1. **RF Oscillators:** Used to set frequency where drifting would cause the signal to drop. 2. **Filter Networks:** High-precision tuning in radio transmitters and receivers. 3. **Pulse Circuits:** Handling high-speed transitions due to low inductance. 4. **Snubber Circuits:** In power electronics where high voltage spikes occur.