The **AC20-R10K-RC** is a precision **air-core power inductor** (specifically an RF choke) manufactured by Bourns. These components are designed for high-frequency applications where high "Q" factors and minimal core losses are required. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics: | Parameter | Value | | :--- | :--- | | **Inductance** | 10.0 µH | | **Tolerance** | ±10% | | **Current Rating (DC)** | 3.0 Amperes | | **DC Resistance (DCR)** | 0.05 Ohms (Max) | | **Core Material** | Air Core | | **Operating Temperature** | -55°C to +105°C | | **Suffix "RC"** | RoHS Compliant | --- ### 2. Physical Construction The "AC" prefix stands for **Air Core**. Unlike standard inductors that use ferrite or iron powder cores, this part uses an open-air center. * **Coil Design:** Constructed from heavy-gauge copper wire wound in a cylindrical shape. * **Encapsulation:** Usually coated with a polyolefin shrink tubing or a protective resin to provide mechanical stability and moisture resistance. * **Leads:** Features radial leads for Through-Hole Mounting (THT). --- ### 3. Key Advantages Because it lacks a magnetic core, the AC20-R10K-RC offers unique performance benefits: * **No Magnetic Saturation:** Inductance remains constant regardless of the DC current passing through it. * **High Q-Factor:** Excellent efficiency at high frequencies because there are no "core losses" (eddy currents or hysteresis). * **Linearity:** Provides very linear performance across a wide range of frequencies. --- ### 4. Common Applications This specific 10µH inductor is typically found in: 1. **RF Circuits:** Used as a choke to block high-frequency noise while allowing DC power to pass. 2. **Power Supplies:** High-frequency switching regulators where core saturation must be avoided. 3. **Filters:** Low-pass or band-pass filters in communication equipment. 4. **Audio Gear:** Crossover networks or speaker protection circuits to prevent interference. ---