The **CD19FD162J03** is a specific type of high-precision **Mica Capacitor**. These components are widely used in Radio Frequency (RF) circuits and high-stability timing applications due to their excellent temperature stability and low loss characteristics. --- ## 1. Technical Specifications | Parameter | Specification | Details | | :--- | :--- | :--- | | **Capacitance** | 1,600 pF (1.6 nF) | "162" = 16 (value) + 2 (zeros) | | **Tolerance** | ±5% | "J" represents 5% accuracy | | **Voltage Rating** | 500 VDC | High voltage handling capability | | **Case Style** | CD19 | Standard dipped mica body size | | **Dielectric** | Silver Mica | Provides superior stability | | **Operating Temp** | -55°C to +125°C | Industrial/Military grade range | --- ## 2. Part Number Breakdown Understanding the nomenclature helps in identifying equivalent parts: 1. **CD19**: Refers to the physical case size and lead spacing. 2. **F**: Refers to the voltage rating (specifically 500V in this manufacturer's coding). 3. **D**: Indicates the characteristic/temperature coefficient. 4. **162**: The capacitance value. The first two digits (16) are significant figures, and the third (2) is the multiplier. 16 x 10^2 = 1,600 pF. 5. **J**: The tolerance code. J = ±5%. 6. **O3**: Typically refers to the lead style or packaging (e.g., straight leads, bulk pack). --- ## 3. Key Characteristics and Usage ### Why Silver Mica? * **High Precision:** They maintain their value over long periods compared to ceramic capacitors. * **Low Dissipation:** They have a very low ESR (Equivalent Series Resistance), making them ideal for high-frequency filters. * **Temperature Stability:** The capacitance changes very little as the temperature fluctuates. ### Common Applications * **RF Oscillators:** Ensuring a stable frequency in radio transmitters and receivers. * **Filter Networks:** Used in high-order filters where precise values are critical. * **Coupling/Decoupling:** High-voltage paths in audio amplifiers or vintage electronics restoration. * **Snubber Circuits:** Small-scale snubbing in power electronics. --- ## 4. Physical Dimensions (CD19 Style) * **Width:** ~16.0 mm (Approx) * **Height:** ~13.0 mm (Approx) * **Thickness:** ~5.0 mm to 7.0 mm * **Lead Spacing:** 8.7 mm (Standard for CD19)