The part number **04025K8R2ABSTR\500** refers to a high-frequency Thin-Film Capacitor manufactured by **Kyocera AVX**. These components are specifically engineered for RF (Radio Frequency) and microwave applications where precision and stability are critical. --- ### 1. Technical Specification Breakdown The part number is an alphanumeric code where each section defines a specific characteristic of the component: | Code Segment | Property | Description | | :--- | :--- | :--- | | **0402** | Case Size | 0402 (0.04 x 0.02 inches / 1.0 x 0.5 mm) | | **5** | Voltage | 50 Volts DC | | **K** | Technology | Thin-Film "Accu-P" Series | | **8R2** | Capacitance | 8.2 pF (R acts as a decimal point) | | **A** | Tolerance | ±0.05 pF (Ultra-tight tolerance) | | **B** | Termination | Sn100 (Lead-Free / RoHS Compliant) | | **STR** | Packaging | Taped and Reeled (Standard) | | **500** | Quantity | 500 pieces per reel | --- ### 2. Key Technical Features This specific capacitor belongs to the **Accu-P®** series, which is known for several high-end electronic properties: * **Ultra-Low ESR:** Extremely low Equivalent Series Resistance, reducing energy loss at high frequencies. * **High Q Factor:** High quality factor ensures sharp resonance and minimal signal attenuation. * **Thin-Film Technology:** Unlike standard multilayer ceramic capacitors (MLCCs), thin-film capacitors are manufactured using a process similar to semiconductors, allowing for much tighter tolerances and better batch-to-batch consistency. * **Frequency Stability:** Maintains stable capacitance values into the Gigahertz (GHz) range. --- ### 3. Applications Due to its 8.2 pF value and tight tolerance, this part is commonly found in: * **RF Power Amplifiers:** For impedance matching and decoupling. * **Filter Networks:** Low-pass, high-pass, and band-pass filters in wireless communication. * **Satellite Communications:** Where signal integrity is paramount. * **Mobile Devices:** 5G/4G LTE circuitry and Wi-Fi modules. --- ### 4. Comparison Table: Thin-Film vs. Standard MLCC | Feature | Thin-Film (Accu-P) | Standard MLCC (C0G/NP0) | | :--- | :--- | :--- | | **Precision** | Very High (±0.01 pF to ±0.1 pF) | Moderate (±5% or ±0.25 pF) | | **Frequency Response** | Stable up to 10GHz+ | Usually drops off after 1-2GHz | | **Cost** | Higher | Lower | | **Main Use** | RF/Microwave Precision | General Purpose / Decoupling |