The part number **0402YJ8R2ABSTR\500** refers to a high-frequency **Thin Film Capacitor** manufactured by **AVX (now KYOCERA AVX)**. This component is specifically designed for RF (Radio Frequency) and microwave applications where precision and high Q-factors are critical. --- ### 1. Technical Specification Breakdown Each character in the part number identifies a specific technical characteristic of the component: | Code Segment | Meaning | Specification | | :--- | :--- | :--- | | **0402** | Case Size | 0402 (0.04" x 0.02" / 1.0mm x 0.5mm) | | **Y** | Series/Voltage | Accu-P® Series (Standard Type) | | **J** | Voltage Rating | 6.3 Volts DC | | **8R2** | Capacitance Value | 8.2 pF (R denotes decimal) | | **A** | Capacitance Tolerance | ± 0.05 pF (Ultra-tight tolerance) | | **B** | Temperature Coeff. | 0 ± 30 ppm/°C | | **S** | Termination | Nickel Barrier / Solder Coated (Sn/Pb) | | **TR\500** | Packaging | Tape & Reel (Quantity: 500 pcs) | --- ### 2. Key Features * **Thin Film Technology:** Unlike standard MLCCs (Multi-Layer Ceramic Capacitors), thin film capacitors are made using a photolithographic process. This results in extremely precise physical dimensions and electrical properties. * **High Q Factor:** Offers very low ESR (Equivalent Series Resistance) at high frequencies, meaning less signal loss in RF circuits. * **Ultra-Tight Tolerance:** The "A" rating (± 0.05 pF) is far more precise than standard commercial capacitors, which often have 5% or 10% tolerances. * **High SRF:** High Self-Resonant Frequency, making it ideal for GHz-range applications. --- ### 3. Typical Applications This specific capacitor is used in circuits where signal integrity and frequency stability are paramount: 1. **Mobile Communications:** Smartphones, 4G/5G base stations, and satellite receivers. 2. **RF Matching Networks:** Impedance matching for antennas to ensure maximum power transfer. 3. **Filters:** Used in band-pass or low-pass filters to select specific signal frequencies. 4. **VCOs:** Voltage Controlled Oscillators requiring stable capacitance over temperature changes. --- ### 4. Comparison: Thin Film vs. Standard MLCC | Feature | Thin Film (Accu-P) | Standard MLCC (C0G/NP0) | | :--- | :--- | :--- | | **Precision** | Extremely High (±0.05pF) | Moderate (±0.25pF or 5%) | | **Consistency** | Batch-to-batch uniformity | Higher variance | | **Cost** | Higher | Lower | | **Best Use** | RF / Microwave / GHz | General Purpose / Decoupling |