Based on the part number **DM05DA151DO3-SA-R02**, this component is a **high-reliability capacitor**, likely an **EMI Suppression / Ceramic Disc Capacitor** manufactured by a specialized electronics firm (often associated with brands like Deki or similar industrial suppliers). Below is a breakdown of the electronic specifications and characteristics based on the standard nomenclature for this series. --- ## 1. Technical Specifications | Parameter | Specification | Description | | :--- | :--- | :--- | | **Capacitance** | 150 pF (151) | "15" followed by "1" zero. | | **Tolerance** | ±5% (J/D) | High precision for timing/filtering applications. | | **Voltage Rating** | 500V - 1kV DC | Typical rating for the "DA" industrial series. | | **Dielectric Material** | Class 1 (NPO/COG) | Temperature compensating, ultra-stable. | | **Terminal Style** | Radial Leads | Through-hole mounting (THT). | | **Coating** | Epoxy Resin | Flame retardant (UL 94V-0). | --- ## 2. Part Number Decoder The code is structured to define every physical and electrical attribute: 1. **DM**: Product Series (Dip Mica or specialized Ceramic Disc). 2. **05**: Case Size / Diameter (approx. 5mm diameter). 3. **DA**: Voltage/Material code (often designates 500V or 1kV rating). 4. **151**: Capacitance value (150 picofarads). 5. **D/J**: Tolerance indicator. 6. **SA**: Lead configuration (Straight/Standard Alignment). 7. **R02**: RoHS Compliance and Revision status. --- ## 3. Key Electronic Functions ### A. Temperature Stability (NPO/C0G) Because this part likely uses a Class 1 dielectric, its capacitance does not change significantly with temperature fluctuations. This makes it ideal for **resonant circuits** where frequency stability is critical. ### B. High Q Factor It features a high "Quality Factor," meaning it has very low energy loss (low ESR). This is essential for high-frequency RF applications. ### C. Voltage Endurance The "DA" designation implies the part is built to handle voltage spikes and continuous high-voltage stress without dielectric breakdown. --- ## 4. Common Applications * **RF Oscillators:** Used to maintain stable frequencies in transmitters. * **Coupling/Decoupling:** Providing a path for AC signals while blocking DC in high-voltage stages. * **Snubber Circuits:** Protecting semiconductors from inductive voltage spikes. * **Medical Electronics:** Used in imaging or diagnostic equipment requiring high-reliability components. ---