The part number **DM05EC102JO3-ST-R02** refers to a high-precision **Mica Capacitor** manufactured by Cornell Dubilier (CDE). These components are known for their exceptional stability, low loss, and reliability in RF (Radio Frequency) and high-frequency applications. --- ### 1. Technical Specifications Below is a breakdown of the key electrical and physical characteristics for this specific model: | Parameter | Value / Description | | :--- | :--- | | **Capacitance** | 1000 pF (1.0 nF) | | **Tolerance** | ±5% (indicated by 'J') | | **Voltage Rating** | 300 VDC | | **Dielectric Material** | Silver Mica | | **Operating Temperature** | -55°C to +125°C | | **Termination Style** | Radial Leads (Through-Hole) | | **Case Type** | Dipped (Epoxy Coating) | --- ### 2. Part Number Decoder The alphanumeric string provides specific details about the component's construction: * **DM05**: Refers to the physical case size and style (Standard Dipped Mica). * **EC**: Temperature coefficient and characteristic code. * **102**: Capacitance value. The first two digits are significant figures (10), and the third is the multiplier ($10^2$). Result: $1000$ pF. * **J**: Tolerance code ($\pm 5\%$). * **O3**: Voltage rating code (300V). * **ST**: Lead style/spacing configuration. * **R02**: Packaging or specific revision suffix (often indicating RoHS compliance or tape/reel format). --- ### 3. Key Advantages Mica capacitors like the DM05 series are chosen over ceramic or electrolytic capacitors for several reasons: 1. **Low Dissipation Factor**: They exhibit extremely low losses, making them ideal for high-Q circuits. 2. **Temperature Stability**: The capacitance remains remarkably constant across a wide range of temperatures. 3. **High Voltage Handling**: Silver mica can withstand significant voltage stress relative to its small size. 4. **Precision**: They are used when tight tolerances and long-term reliability are required. --- ### 4. Common Applications * **RF Oscillators**: Maintaining frequency stability. * **Filter Networks**: Used in high-fidelity audio and radio tuning circuits. * **Snubber Circuits**: Protecting sensitive components from voltage spikes. * **Timing Circuits**: Where precision interval measurement is critical.