The **DM05FE151JO3-ST-R02** is a high-precision, high-reliability **Mica Capacitor** manufactured by Cornell Dubilier (CDE). These components are widely used in RF applications due to their stability and low loss. --- ### 1. Technical Specifications Below is a breakdown of the electrical and physical characteristics of this part: | Parameter | Specification | | :--- | :--- | | **Capacitance** | 150 pF (Picofarads) | | **Tolerance** | ±5% (indicated by 'J') | | **Voltage Rating** | 500 VDC | | **Dielectric Material** | Silver Mica | | **Operating Temperature** | -55°C to +125°C | | **Mounting Type** | Through-hole (Radial Leads) | | **Termination** | SnAgCu (RoHS Compliant) | --- ### 2. Part Number Breakdown The alphanumeric code follows the CDE standard naming convention for dipped mica capacitors: * **DM**: Type (Dipped Mica). * **05**: Case Size (Smallest standard size). * **FE**: Temperature coefficient and capacitance drift characteristics. * **151**: Capacitance value code. The first two digits are significant (15), the third is the multiplier ($10^1$). $15 \times 10 = 150$ pF. * **J**: Tolerance code (±5%). * **O3**: Internal manufacturer designator for lead spacing/style. * **ST**: Short lead variation. * **R02**: RoHS compliance/Packaging identifier. --- ### 3. Key Electronic Properties * **Silver Mica Dielectric:** Unlike ceramic or electrolytic capacitors, mica is a natural mineral that is chemically stable. It does not age or degrade significantly over time. * **High Q-Factor:** This part has extremely low losses at high frequencies, making it ideal for tuned circuits. * **Low Inductance:** The radial lead construction and small size minimize parasitic inductance. * **Voltage Stability:** The capacitance remains very constant even as the applied voltage changes. --- ### 4. Common Applications Due to its precision and stability, this capacitor is typically used in: 1. **RF Oscillators:** Maintaining a stable frequency in radio transmitters. 2. **Filter Networks:** Precision low-pass, high-pass, or band-pass filters where drift is unacceptable. 3. **Snubber Circuits:** Handling high-voltage spikes in low-current environments. 4. **Audio Equipment:** High-end audio paths where "capacitor coloring" must be minimized.