The **DM19FC100JO3-SA-R02** is a high-precision, high-reliability **Silver Mica Capacitor** manufactured by Cornell Dubilier (CDE). Mica capacitors are renowned for their stability, low loss, and high performance in RF and high-frequency applications. --- ## 1. Technical Specifications Below are the primary electrical characteristics for this specific part number: | Parameter | Specification | | :--- | :--- | | **Capacitance** | 10 pF | | **Tolerance** | ±5% (indicated by 'J') | | **Voltage Rating** | 300 VDC (typical for DM19 series) | | **Dielectric Material** | Silver Mica | | **Operating Temperature** | -55°C to +125°C | | **Termination** | Standard Leaded (usually Sn/Ag/Cu) | | **Case Size** | DM19 (Standard Dipped Case) | --- ## 2. Key Characteristics The "Silver Mica" construction provides several advantages over standard ceramic (MLCC) or electrolytic capacitors: ### A. Excellent Stability * **Temperature Coefficient:** They exhibit very low change in capacitance over a wide temperature range. * **Aging:** Unlike some ceramics, mica capacitors do not significantly age or lose capacitance over time. ### B. Low Loss (High Q Factor) * They have an extremely low dissipation factor. This makes them ideal for resonant circuits where a high **Q (Quality) factor** is required to maintain sharp frequency selection. ### C. High Voltage & Precision * The DM19 series is designed to handle higher voltages (up to 500V depending on specific sub-variants) while maintaining tight tolerances. --- ## 3. Part Number Breakdown While manufacturer codes can vary slightly by region, the breakdown generally follows this logic: * **DM19:** Refers to the physical case size and style (Dipped Mica). * **FC:** Characteristic code (Temperature coefficient and capacitance drift). * **100:** The capacitance value in pF (100 = 10 x 10^0 = 10 pF). * **J:** Tolerance code (J = ±5%). * **O3:** Voltage or internal designator. * **SA-R02:** Specific packaging or lead-free (RoHS) compliance suffix. --- ## 4. Common Applications Due to their high stability and low loss, this part is typically used in: 1. **RF Oscillators:** Maintaining a stable frequency. 2. **Filter Networks:** Precision tuning in radio and telecommunications. 3. **Snubber Circuits:** In high-speed switching where low inductance is required. 4. **Coupling/Decoupling:** In high-frequency signal paths. ---