The part number **SMDCHR0603-R22** refers to a Surface Mount Device (SMD) high-current or high-frequency chip inductor. Below is a detailed breakdown of its specifications and physical characteristics. ### 1. Part Number Breakdown | Component Segment | Definition | Description | | :--- | :--- | :--- | | **SMD** | Surface Mount Device | Designed for automated PCB assembly. | | **CHR** | Series Type | Often indicates a "Chip High-Reliability" or "High-Current" inductor series. | | **0603** | Package Size | Dimensions in inches (0.06" x 0.03"). | | **R22** | Inductance Value | **0.22 µH** (R acts as a decimal point). | --- ### 2. Physical Specifications The **0603** package size is one of the most common footprints in modern electronics. * **Metric Equivalent:** 1608 (1.6mm x 0.8mm). * **Dimensions:** Approximately 1.6mm (L) x 0.8mm (W) x 0.8mm (H). * **Mounting:** Designed for SMT (Surface Mount Technology) soldering. --- ### 3. Electrical Characteristics (General Estimates) *Values may vary slightly depending on the specific manufacturer (e.g., Bourns, Murata, TDK), but typically follow these ranges:* * **Inductance:** 0.22 µH (Microhenries). * **Tolerance:** Usually ±10% (K) or ±20% (M). * **DC Resistance (DCR):** Very low, typically ranging from 0.05Ω to 0.3Ω to minimize power loss. * **Rated Current:** Generally between 200mA and 1500mA, depending on whether it is a wire-wound or multilayer construction. * **Self-Resonant Frequency (SRF):** High, often in the 200MHz to 500MHz range, making it suitable for high-frequency filtering. --- ### 4. Common Applications Due to its small size and 0.22 µH inductance, this part is frequently used for: 1. **DC-DC Converters:** Small power modules in mobile devices. 2. **Noise Filtering:** Suppressing High-Frequency (HF) noise in signal lines. 3. **RF Circuits:** Matching networks or decoupling in wireless communication modules (Bluetooth, Wi-Fi). 4. **Decoupling:** Filtering power supply rails for Integrated Circuits (ICs). --- ### 5. Sample Land Pattern (Footprint) If you are designing a PCB, the standard 0603 footprint is as follows: ```text <-- 1.6mm --> +-------------+ | [Pad] [Pad] | +-------------+ ^ 0.8mm width ```