The part number **DM05FC100DO3-SA-R02** refers to a high-precision **Mica Capacitor** manufactured by CDE (Cornell Dubilier Electronics). These components are renowned for their stability and reliability in RF (Radio Frequency) and high-frequency applications. --- ## Technical Specifications | Parameter | Specification | | :--- | :--- | | **Capacitance** | 10 pF (Picofarads) | | **Tolerance** | ±0.5 pF (indicated by the 'D' code) | | **Voltage Rating** | 500 VDC | | **Dielectric Material** | Natural Muscovite Mica | | **Case Size / Style** | DM05 (Miniature Dipped Mica) | | **Operating Temperature** | -55°C to +125°C | | **Termination** | Standard Leaded (usually Solder-coated Copper Clad Steel) | --- ## Key Features ### 1. High Stability Mica capacitors are chosen specifically because their capacitance changes very little over time, temperature, and voltage. They exhibit a low **Temperature Coefficient (TC)**, making them ideal for precision circuits. ### 2. Low Loss (High Q Factor) These parts have extremely low dissipation factors. In high-frequency applications, they maintain a high "Quality Factor" (Q), meaning they lose very little energy as heat compared to ceramic or electrolytic capacitors. ### 3. High Voltage Handling Despite its small physical footprint (DM05 size), this part can handle up to **500 Volts**, which is significantly higher than many SMD ceramic capacitors of similar sizes. ### 4. Precision Tolerance The "D" in the part number signifies a tolerance of **±0.5 pF**. In low-capacitance values (like 10pF), absolute tolerance is critical for tuning circuits. --- ## Common Applications * **RF Oscillators:** Used to maintain frequency stability. * **Filters:** High-Q filters for telecommunications. * **Coupling/Decoupling:** In high-voltage power supplies or transmitters. * **Pulse Circuits:** Due to their ability to handle rapid voltage transitions without degrading. --- ## Part Number Breakdown (Partial) * **DM05:** Physical case style/size (Dipped Mica, size 05). * **FC:** Characteristic code (Temperature coefficient and drift). * **100:** Capacitance value (10 + 0 zeros = 10pF). * **D:** Tolerance (±0.5 pF). * **O3:** Voltage rating (500V).