The part number **DM05DY151JO3-SA-R02** refers to a high-precision **Mica Capacitor** typically manufactured by companies like Cornell Dubilier (CDE). These components are known for their extreme stability, low loss, and reliability in RF (Radio Frequency) circuits. ### Component Breakdown The alphanumeric code provides specific details regarding its electrical characteristics and physical build: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Series** | DM05 | Miniature dipped mica capacitor style. | | **Capacitance** | 151 | 150 pF (15 followed by 1 zero). | | **Tolerance** | J | ±5% (Standard precision for mica). | | **Voltage** | O3 | Typically represents 300V or 500V DC (Series dependent). | | **Characteristic** | D / Y | Temperature coefficient and drift specifications. | | **Termination** | SA-R02 | Specific lead type, spacing, and RoHS compliance status. | --- ### Key Technical Features 1. **Dielectric Material:** Uses Natural Muscovite Mica. Unlike ceramic, mica does not age and has a very low temperature coefficient. 2. **Stability:** It offers excellent "retrace" characteristics, meaning the capacitance returns to its original value after temperature cycling. 3. **Frequency Response:** Excellent performance at high frequencies (VHF/UHF) due to low inductance and low ESR (Equivalent Series Resistance). 4. **Durability:** Dipped in epoxy resin to provide humidity resistance and mechanical ruggedness. ### Typical Applications * **RF Oscillators:** Used to maintain a steady frequency despite temperature changes. * **Filter Networks:** High-Q circuits where precise signal filtering is required. * **Snubber Circuits:** In low-power pulse applications where low loss is critical. * **Tuning Circuits:** Found in radio transmitters and high-end audio equipment. --- ### Comparison with Ceramic Capacitors | Feature | Mica (DM05) | Ceramic (MLCC) | | :--- | :--- | :--- | | **Stability** | Very High | Low to Moderate (except C0G) | | **Aging** | No aging effect | Capacitance decreases over time | | **Voltage Coefficient**| Negligible | Can lose capacity under load | | **Cost** | Higher | Lower |