The part number **DM05DC151DO3-SA-R02** typically refers to a high-precision, high-reliability **Mica Capacitor**. These components are frequently used in RF (Radio Frequency) applications, timing circuits, and industrial electronics where stability is critical. ### 1. General Specifications The following table outlines the technical characteristics typical for this specific series and part configuration: | Feature | Specification | Description | | :--- | :--- | :--- | | **Component Type** | Mica Capacitor | Uses Silver Mica as the dielectric material. | | **Capacitance** | 150 pF (151) | "151" translates to 15 x 10^1 = 150. | | **Tolerance** | ±0.5pF or ±5% | High precision (indicated by 'D' or 'J' codes). | | **Voltage Rating** | 500V DC (Typical) | High dielectric strength for power circuits. | | **Operating Temp** | -55°C to +125°C | Designed for extreme environments. | | **Mounting Type** | Through-hole | Radial leads for PCB mounting. | --- ### 2. Breakdown of the Part Number While nomenclature can vary slightly by manufacturer (e.g., Cornell Dubilier or CDE), the code generally breaks down as follows: * **DM05**: Refers to the physical case size and style (Standard Dipped Mica). * **DC**: Indicates the working voltage rating (e.g., 300V or 500V depending on the specific catalog). * **151**: The capacitance code. The first two digits are significant figures, the third is the multiplier (150 picofarads). * **D/J**: The tolerance code (D = ±0.5pF; J = ±5%). * **SA**: Specific lead spacing or lead style (Straight or Kinked). * **R02**: Revision code or packaging indicator (e.g., RoHS compliant, Tape & Reel). --- ### 3. Key Characteristics Silver Mica capacitors are chosen for specific properties that other capacitors (like Ceramic or Electrolytic) cannot provide: 1. **Low Dissipation Factor:** They exhibit very low losses at high frequencies, making them ideal for filters and oscillators. 2. **Temperature Stability:** The capacitance changes very little across a wide temperature range (typically 0 to +70 ppm/°C). 3. **High Voltage Endurance:** They are resistant to "silver migration" and dielectric breakdown under high voltage. 4. **Low Inductance:** Due to their construction, they have very low internal inductance. ### 4. Typical Applications * **RF Circuits:** Used in transmitters and receivers for tuning and coupling. * **Pulse Circuits:** High dV/dt ratings allow them to handle rapid voltage changes. * **Calibration Equipment:** Used as stable reference standards in measurement tools. * **Audio Gear:** Occasionally used in high-end audio crossovers and pre-amps for their "clean" signal path. ---