The **AC20-R27K-RC** is an electronic component belonging to the **fixed inductor** category, specifically a subminiature axial leaded inductor manufactured by Allied Components International. ### 1. Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 0.27 µH | | **Tolerance** | ±10% (K) | | **Current Rating (Max)** | 1,120 mA (1.12 A) | | **DC Resistance (Max)** | 0.080 Ohms | | **Self-Resonant Frequency (Min)** | 525 MHz | | **Quality Factor (Q Min)** | 35 | | **Body Diameter** | 2.4 mm | | **Body Length** | 4.4 mm | --- ### 2. Part Number Breakdown The nomenclature follows a specific pattern used by the manufacturer: * **AC20:** Series identifier for subminiature axial leaded inductors (molded or coated). * **R27:** Indicates the inductance value. "R" acts as the decimal point (0.27). * **K:** Tolerance code (K = ±10%). * **RC:** RoHS Compliant. --- ### 3. Key Characteristics and Design * **Form Factor:** It features an axial leaded design, meaning the wires protrude from both ends along the central axis of the body. This is ideal for Through-Hole Technology (THT) PCB assembly. * **Materials:** Typically constructed using a phenolic or ferrite core with a copper wire winding, protected by an epoxy resin or molded coating for environmental durability. * **High Frequency:** With a high self-resonant frequency (525 MHz), this part is effective in high-frequency signal applications. --- ### 4. Common Applications Due to its small size and high current rating relative to its footprint, the AC20-R27K-RC is commonly used for: 1. **RF Choking:** To block high-frequency noise in radio frequency circuits. 2. **Decoupling:** Filtering power supply lines to prevent interference between circuit stages. 3. **Signal Conditioning:** Used in filters and oscillators where precise inductance is required. 4. **Consumer Electronics:** Found in telecommunications equipment, computer peripherals, and power supplies.