The part number **DM10FD151KO3-RHR02** refers to a high-precision, high-reliability **Silver Mica Capacitor** manufactured by Cornell Dubilier (CDE). These components are widely used in RF (Radio Frequency) applications due to their exceptional stability. --- ### 1. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Capacitance** | 150 pF (Picofarads) | | **Tolerance** | ±10% (Indicated by 'K') | | **Voltage Rating** | 500 VDC | | **Dielectric Material** | Silver Mica | | **Operating Temperature** | -55°C to +125°C | | **Termination Style** | Radial Leaded | | **Case Size** | DM10 | --- ### 2. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics: * **DM10**: Refers to the physical case size and style (Standard dipped mica). * **F**: Temperature coefficient range. * **D**: Voltage rating code (typically 500V for this series). * **151**: Capacitance code. The first two digits (15) are the value, and the third (1) is the multiplier ($10^1$). $15 \times 10 = 150$ pF. * **K**: Tolerance code (±10%). * **O3**: Internal manufacturing/lead spacing code. * **RHR02**: Specific RoHS compliance and packaging/processing suffix. --- ### 3. Key Characteristics * **Stability:** Mica capacitors are known for having very low capacitance drift over time and temperature changes. * **Low Loss:** They exhibit very low ESR (Equivalent Series Resistance) and high Q factors, making them ideal for high-frequency filtering. * **High Voltage:** The 500V rating allows it to be used in power supply stages or vacuum tube equipment. * **Precision:** Unlike ceramic capacitors (like Z5U or Y5V), mica does not change capacitance significantly with applied voltage (Voltage Coefficient). --- ### 4. Common Applications Due to its 150pF value and 500V rating, this part is commonly found in: 1. **RF Oscillators:** Maintaining a stable frequency. 2. **Tuned Circuits:** Used in amateur radio and professional broadcasting equipment. 3. **Snubber Circuits:** Small-scale pulse handling in power electronics. 4. **Audio Equipment:** High-end tube amplifiers often use silver mica for signal coupling or tone stacks because of their "linear" sound characteristics.