The **CE201210-R22J** is a surface-mount multilayer ceramic chip inductor. It is a passive electronic component commonly used in high-frequency circuits to provide inductance while maintaining a small footprint. --- ### 1. Part Number Breakdown The alphanumeric code follows a standard industry naming convention: | Segment | Value | Description | | :--- | :--- | :--- | | **Series** | CE | Multilayer Chip Inductor (General Purpose) | | **Size (Metric)** | 2012 | Dimensions: 2.0mm x 1.25mm (Imperial equivalent: 0805) | | **Thickness** | 10 | 1.0mm nominal thickness | | **Inductance** | R22 | **0.22 µH** (220 nH). "R" acts as the decimal point. | | **Tolerance** | J | **±5%** (Standard precision) | --- ### 2. Technical Specifications Typical electrical characteristics for this specific part include: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.22 µH (220 nH) | | **DC Resistance (DCR)** | ~0.50 Ω (Max) | | **Rated Current** | ~250 mA | | **Self-Resonant Frequency (SRF)** | > 250 MHz | | **Operating Temperature** | -55°C to +125°C | | **Package Style** | 0805 (SMD) | --- ### 3. Construction and Features * **Multilayer Technology:** Unlike wire-wound inductors, this part is constructed by layering ceramic material and conductive paste (usually silver) and firing them into a monolithic block. * **Magnetic Shielding:** The multilayer structure provides a closed magnetic circuit, minimizing electromagnetic interference (EMI) with surrounding components. * **High Reliability:** No external wires to break or short, making it highly vibration-resistant. * **Solderability:** Features nickel/tin plated terminations suitable for flow or reflow soldering. --- ### 4. Common Applications Due to its inductance value and high-frequency performance, the R22J is typically found in: 1. **RF Circuits:** Matching networks and filters for wireless communication. 2. **Decoupling:** Filtering high-frequency noise in power supply lines for ICs. 3. **Portable Electronics:** Used in smartphones, tablets, and wearables where space is at a premium. 4. **Signal Conditioning:** Maintaining signal integrity in high-speed data lines. ---