The part number **04023K4R7ABSTR\500** refers to a high-frequency Thin-Film Capacitor manufactured by **Kyocera AVX**. These components are specifically designed for RF (Radio Frequency) and microwave applications where precision and stability are critical. --- ### 1. Part Number Breakdown Understanding each character in the part number provides the technical specifications of the component: | Code | Meaning | Description | | :--- | :--- | :--- | | **0402** | Case Size | Dimensions: 0.04 x 0.02 inches (1.0 x 0.5 mm). | | **3** | Voltage | Rated at **25 Volts DC**. | | **K** | Dielectric | Specific Thin-Film formulation for RF stability. | | **4R7** | Capacitance | **4.7 pF** (R acts as the decimal point). | | **A** | Tolerance | Tight tolerance of **±0.05 pF**. | | **B** | Termination | Sn100 (Lead-Free/RoHS compliant solder plating). | | **STR** | Packaging | Taped and Reeled (Standard orientation). | | **\500** | Quantity | 500 pieces per reel. | --- ### 2. Key Technical Specifications These capacitors are built using thin-film technology (similar to semiconductor manufacturing) rather than the standard multilayer ceramic (MLCC) process. * **Capacitance:** 4.7 pF * **Tolerance:** ±0.05 pF (Extremely high precision) * **Rated Voltage:** 25V * **Operating Temperature:** -55°C to +125°C * **Quality Factor (Q):** Very high, typically used for low-loss performance in the GHz range. * **Self-Resonant Frequency (SRF):** High SRF, making it suitable for modern wireless communication devices. --- ### 3. Typical Applications Due to its high precision and low ESR (Equivalent Series Resistance), this part is commonly found in: 1. **Wireless Communications:** Mobile phones, Wi-Fi modules, and Bluetooth circuits. 2. **RF Matching Networks:** Impedance matching for antennas to ensure maximum power transfer. 3. **Filter Circuits:** Low-pass, high-pass, and band-pass filters in high-frequency stages. 4. **Satellite Receivers:** Low-noise blocks (LNBs) and signal processing. --- ### 4. Comparison: Thin-Film vs. MLCC | Feature | Thin-Film (04023K...) | Standard MLCC (C0G/NP0) | | :--- | :--- | :--- | | **Tolerance** | Very Tight (down to ±0.01pF) | Standard (±5% or 0.25pF) | | **Repeatability** | High (unit-to-unit consistency) | Moderate | | **Frequency Response** | Linear and predictable | Can vary at high frequencies | | **Cost** | Higher | Lower |