The part number **DM05CY102JO3-SA-R02** refers to a high-precision **Mica Capacitor** manufactured by companies like **Cornell Dubilier (CDE)** or similar high-reliability electronic component suppliers. Mica capacitors are renowned for their stability and low loss in RF applications. --- ### 1. Technical Specification Breakdown Based on standard naming conventions for Mica capacitors, here is the technical breakdown of the part number: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **DM05** | Case Size/Series | Standard sub-miniature dipped mica package size. | | **CY** | Characteristic | Temperature coefficient and drift specifications (typically -20 to +100 ppm/°C). | | **102** | Capacitance Value | **1000 pF** (10 followed by 2 zeros). | | **J** | Tolerance | **±5%** (Standard precision). | | **O3** | Voltage Rating | **300V DC** (O3 typically represents 300V in this series). | | **SA-R02** | Specifics | Lead spacing, finish (RoHS), or specific bulk packaging codes. | --- ### 2. Key Features Mica capacitors of this type possess unique physical and electrical characteristics that differentiate them from ceramic or electrolytic capacitors: * **High Stability:** Extremely low drift over time and temperature. * **Low Dissipation Factor:** High Q-factor, making them ideal for high-frequency (RF) circuits. * **Temperature Range:** Typically rated for operation from **-55°C to +125°C**. * **Dielectric Absorption:** Very low, allowing for precision timing and filtering. --- ### 3. Common Applications Due to its 1000pF (1nF) value and high-voltage rating, this part is commonly used in: 1. **RF Oscillators:** Maintaining frequency stability in radio transmitters and receivers. 2. **Tuned Circuits:** High-Q filters where precise resonance is required. 3. **Pulse Circuits:** Handling rapid voltage changes without degradation. 4. **Snubber Circuits:** Small-scale protection in power supplies (though less common than ceramic in modern SMD apps). --- ### 4. Physical Dimensions (Typical DM05) ```text Approximate dimensions for a DM05 package: - Width: ~11.4 mm (max) - Height: ~9.1 mm (max) - Thick: ~4.3 mm (max) - Lead Spacing: ~3.0 mm to 5.0 mm (varies by suffix) ```