The part number **DM05FC100JO3-SA-R02** refers to a high-precision **Mica Capacitor** manufactured by Cornell Dubilier (CDE). These components are known for their exceptional stability, high reliability, and low loss at high frequencies. --- ### 1. Technical Specifications | Parameter | Specification | Details | | :--- | :--- | :--- | | **Capacitance** | 10 pF | 10 Picofarads | | **Tolerance** | ±5% | Indicated by the "J" in the part number | | **Voltage Rating** | 300V - 500V | High dielectric strength | | **Dielectric Material** | Silver Mica | Natural mineral with high stability | | **Operating Temperature** | -55°C to +125°C | Military/Industrial grade range | | **Package Type** | Radial Leaded | Standard dipped epoxy coating | --- ### 2. Part Number Breakdown The alphanumeric code provides specific details about the component's physical and electrical properties: * **DM05:** Refers to the case size (Small footprint, roughly 0.1" lead spacing). * **FC:** Indicates the temperature coefficient and characteristic (Standard stability). * **100:** The capacitance value. The first two digits (10) are significant, and the third (0) is the multiplier ($10 \times 10^0 = 10$ pF). * **J:** Tolerance code for ±5%. * **O3:** Voltage code (typically 300V to 500V depending on the series variation). * **SA-R02:** Specific manufacturing codes for lead finish (RoHS compliant) and packaging (Ammo pack or Tape/Reel). --- ### 3. Key Characteristics & Applications #### Why use Silver Mica? * **Precision:** They maintain their capacitance value very accurately over time. * **Low Dissipation:** Excellent for RF (Radio Frequency) applications where energy loss must be minimized. * **Temperature Stability:** The capacitance changes very little as the temperature fluctuates. #### Common Uses 1. **RF Circuits:** Used in transmitters, filters, and oscillators. 2. **Coupling/Decoupling:** High-voltage paths in specialized electronics. 3. **Timing Circuits:** Where a stable time constant is required. 4. **Audio Equipment:** High-end audio enthusiasts use them for their "clean" signal properties. ---