The part number **DM19CE151DO3-SA-R02** refers to a high-reliability, mica dielectric capacitor, typically manufactured by companies like **Cornell Dubilier (CDE)**. These components are designed for stability and precision in RF (Radio Frequency) and high-frequency applications. ### 1. Part Number Breakdown Based on standard industry nomenclature for mica capacitors, here is the technical breakdown: | Component Segment | Value | Description | | :--- | :--- | :--- | | **Series** | DM19 | Standard dipped mica capacitor (Case size 19) | | **Characteristic** | CE | Temperature coefficient and drift specifications | | **Capacitance** | 151 | 150 pF (15 followed by 1 zero) | | **Tolerance** | D | ±0.5 pF (or ±0.5%) | | **Voltage** | O3 | Rated Voltage (commonly 300V or 500V depending on series) | | **Lead style/Finish** | SA-R02 | Specific lead spacing and RoHS compliance status | --- ### 2. Technical Specifications These parts are known for their "silver mica" construction, which offers superior electrical characteristics compared to standard ceramic capacitors. * **Capacitance:** 150 pF (Picofarads). * **Dielectric Material:** Silver Mica (provides low loss and high stability). * **Operating Temperature:** Typically -55°C to +125°C or +150°C. * **Stability:** Excellent resistance to aging and low capacitance change over time. * **Q Factor:** High Q factor, making it ideal for tuned circuits and filters. --- ### 3. Common Applications Due to their precision, these capacitors are used in the following areas: 1. **RF Oscillators:** Used to maintain frequency stability in radio transmitters. 2. **Filter Networks:** Essential in high-Q filters where sharp cutoff frequencies are required. 3. **Pulse Circuits:** High voltage handling and low inductance make them suitable for snubbing. 4. **Audio Equipment:** Sometimes used in high-end audio for their linear performance and low distortion. --- ### 4. Advantages vs. Disadvantages | Pros | Cons | | :--- | :--- | | Extreme temperature stability | Higher cost than ceramic capacitors | | Very low ESR (Equivalent Series Resistance) | Larger physical size for the same capacitance | | High precision (tight tolerances) | Not available in very high capacitance values |