The part number **DM05DY102JO3-SA-R02** refers to a high-precision **Mica Capacitor**, typically manufactured by CDE (Cornell Dubilier) or similar specialized manufacturers. These components are renowned for their stability, low loss, and reliability in RF (Radio Frequency) applications. --- ### 1. Technical Specifications Breakdown The alphanumeric code provides specific details about the component's construction and performance: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Series/Type** | DM05 | Miniature Dipped Mica Capacitor (standard size code). | | **Temperature Coeff.** | DY | Characteristic Y (Operating range -55°C to +125°C). | | **Capacitance** | 102 | 1000 pF (10 followed by two zeros). | | **Tolerance** | J | ±5% (standard precision for mica). | | **Voltage Rating** | O3 | Typically represents 300V or 500V DC (varies by manufacturer series). | | **Packaging/Form** | SA-R02 | Specific lead spacing and tape/reel or bulk packaging code. | --- ### 2. Key Characteristics of Mica Capacitors Mica capacitors differ significantly from standard ceramic or electrolytic capacitors: * **High Stability:** The capacitance value remains extremely stable over time and across varying temperatures and voltages. * **Low Dissipation Factor:** They exhibit very low losses, making them ideal for high-frequency circuits where heat generation must be minimized. * **High Precision:** With a tolerance of ±5% (J), these are used where exact values are critical. * **Voltage Withstanding:** They handle high voltage and "dV/dt" (rate of voltage change) pulses without degrading. --- ### 3. Common Applications Due to the "102" (1000pF) value and high-stability nature, this part is commonly found in: 1. **RF Oscillation Circuits:** Ensuring frequency stability in transmitters and receivers. 2. **Filter Networks:** Used in low-pass, high-pass, and band-pass filters where sharp cut-off points are required. 3. **Snubber Circuits:** Protecting semiconductors from voltage spikes in power supplies. 4. **Audio Equipment:** High-end audio gear uses mica for its "transparent" sound profile and low distortion. --- ### 4. Schematic Representation In a circuit diagram, it is represented as a non-polarized capacitor: ```markdown C1 (1000pF) ----||---- Mica ```