The part number **DM15FY151JO3-RHR02** refers to a high-precision, high-reliability **Silver Mica Capacitor** manufactured by Cornell Dubilier (CDE) or a similar specialized manufacturer. Silver mica capacitors are renowned for their stability, low loss, and high performance in RF (Radio Frequency) applications. --- ### ## Technical Specifications Breakdown The following table decodes the part number into its specific electrical and physical characteristics: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Series/Size** | DM15 | Industry-standard "Dipped Mica" size 15 (approx. 11.4 x 11.4 mm). | | **Capacitance Value** | 151 | **150 pF** (15 followed by one zero). | | **Tolerance** | J | **±5%** (Standard precision for mica capacitors). | | **Temperature Range** | F | -55°C to +125°C. | | **Voltage Rating** | Y (or O3 code) | Typically rated for **300V to 500V DC**. | | **Lead Style** | RHR02 | Specific lead spacing and finish (usually radial leads). | --- ### ### Key Features 1. **High Stability:** Mica is a natural mineral that does not change dimensions significantly with temperature, making the capacitance value extremely stable over time. 2. **Low Dissipation Factor:** It has very low energy loss, which is critical for high-frequency filtering. 3. **High dV/dt:** Excellent at handling rapid pulses of voltage. 4. **Excellent for RF:** Used extensively in circuits operating in the MHz range due to low inductance and low ESR (Equivalent Series Resistance). --- ### ### Common Applications * **RF Oscillators:** Used to set the frequency in radio transmitters and receivers. * **Filter Networks:** High-Q filters where precision is required. * **Snubber Circuits:** Used in power electronics to dampen voltage spikes. * **Audio Equipment:** Sometimes used in high-end audio for its linear characteristics. --- ### ### Comparison with Ceramic Capacitors | Feature | Silver Mica (DM15) | Ceramic (MLCC) | | :--- | :--- | :--- | | **Stability** | Exceptional | Variable (depends on dielectric like X7R vs NP0) | | **Voltage Coefficient** | Zero (Capacitance stays same) | High (Capacitance drops as voltage increases) | | **Cost** | High | Low | | **Size** | Bulky | Very Small |