The **ECJ-RVC1H220K** is a part number for a Multilayer Ceramic Chip Capacitor (MLCC) formerly manufactured by Panasonic. This specific series has largely been phased out or superseded by newer series (like the ECJ-G or ECJ-Z), but it remains a standard reference for surface-mount technology (SMT). --- ### 1. Part Number Breakdown To understand the electronic characteristics, we can decode the part number according to Panasonic’s legacy coding system: | Segment | Code | Meaning | | :--- | :--- | :--- | | **Series** | `ECJ` | Panasonic Multilayer Ceramic Chip Capacitor | | **Size/Type** | `R` | Size Code (Refers to 0603 Metric / 0201 Inch) | | **Voltage** | `1H` | Rated Voltage: 50 Volts (DC) | | **Capacitance** | `220` | 22pF (22 followed by 0 zeros) | | **Tolerance** | `K` | ±10% | --- ### 2. Key Technical Specifications Based on the datasheet standards for this series: * **Capacitance:** 22 pF (Picofarads). * **Voltage Rating:** 50V DC (Maximum operating voltage). * **Dielectric Material:** Typically Class 1 (C0G/NP0) or high-stability Class 2, though "VC" often refers to specific temperature characteristics in legacy catalogs. * **Package Size:** 0201 (Imperial) / 0603 (Metric). * *Dimensions:* ~0.6mm x 0.3mm. * **Termination:** Tin (Sn) plated over nickel barrier. --- ### 3. Usage and Applications Small-value capacitors like the 22pF variant are commonly used in high-frequency circuits. 1. **Impedance Matching:** Used in RF (Radio Frequency) circuits to match the impedance between different stages. 2. **Filtering:** Effective at filtering out high-frequency noise in sensitive signal lines. 3. **Oscillators:** Often paired with crystals or resonators to provide the necessary load capacitance for clock circuits in microcontrollers. 4. **Decoupling:** Providing a local energy reservoir for high-speed digital ICs to prevent voltage drops. --- ### 4. Direct Replacement Considerations If you are looking for this part today, Panasonic has consolidated most of its MLCC production. You should look for equivalents using these parameters: * **Footprint:** 0201 (0603 Metric). * **Value:** 22pF. * **Dielectric:** C0G (NP0) is the best replacement for stability. * **Voltage:** 50V or higher.