The part number **DM05DA102JO3-RHR02** refers to a high-precision, high-reliability **Mica Capacitor**. These components are specifically engineered for stability in RF (Radio Frequency) and high-voltage applications. --- ### 1. Component Specification Table | Parameter | Specification | | :--- | :--- | | **Component Type** | Silver Mica Capacitor | | **Capacitance Value** | 1,000 pF (1 nF) | | **Capacitance Tolerance** | ±5% (indicated by 'J') | | **Voltage Rating** | Typically 500V DC (standard for DM05 series) | | **Temperature Range** | -55°C to +125°C | | **Termination** | Radial Leaded | --- ### 2. Breakdown of the Part Number Logic While specific manufacturer prefixes can vary, the nomenclature typically follows this industry standard for mica capacitors: * **DM05:** Refers to the physical case size and style (Standard dipped mica). * **DA:** Internal manufacturer code for voltage or material characteristics. * **102:** The capacitance code. The first two digits (10) are the significant figures, and the third (2) is the multiplier ($10 \times 10^2 = 1000$ pF). * **J:** Represents the tolerance ($\pm 5\%$). * **O3:** Refers to the lead spacing or specific physical lead formation. * **RHR02:** Usually indicates RoHS compliance and specific packaging (e.g., bulk or ammo pack). --- ### 3. Key Technical Characteristics * **High Stability:** Mica capacitors are known for extremely low capacitance drift over time and temperature. * **Low Loss:** They exhibit a very low dissipation factor, making them ideal for high-frequency filters and oscillators. * **Voltage Handling:** Unlike ceramic capacitors, mica versions handle high voltage and dV/dt (voltage spikes) with minimal risk of cracking or dielectric breakdown. * **Precision:** The silvered mica electrodes ensure a very predictable temperature coefficient. --- ### 4. Common Applications Due to its 1,000 pF value and high stability, this part is commonly found in: 1. **RF Oscillators:** Maintaining frequency stability in radio transmitters. 2. **Snubber Circuits:** Absorbing energy in power supplies to prevent voltage spikes. 3. **Audio Equipment:** Used in high-end audio crossovers where signal integrity is critical. 4. **Tuned Circuits:** Bridge and resonance circuits that require tight tolerances.