The **RL0809-182-R** is a specific type of power inductor typically manufactured by companies like **Bourns** (part of their RL0809 series). These are radial-leaded (through-hole) inductors designed for applications requiring high saturation current and durability. --- ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify its electrical characteristics: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **RL0809** | Series/Size | Radial Leaded, approx. 8.2mm (D) x 9.5mm (H). | | **182** | Inductance Value | 18 followed by 2 zeros = 1800 µH (1.8 mH). | | **K** (Implicit/Explicit) | Tolerance | Usually ±10% for this series. | | **-R** | Compliance | Indicates **RoHS** compliance (Lead-free). | --- ### 2. Technical Specifications While exact values can vary slightly by manufacturer, the typical parameters for the 182-R variant are: * **Inductance:** 1.8 mH (millihenries). * **DC Resistance (DCR):** High (typically around 2.0 to 4.5 Ohms due to the high number of windings). * **Rated Current (Idc):** Low (typically between 100mA and 250mA). * **Operating Temperature:** -55°C to +105°C. * **Core Material:** Ferrite (provides high permeability). --- ### 3. Physical Construction * **Mounting Type:** Through-hole (Radial). The leads come out of the bottom of the component. * **Coating:** Usually covered with a polyolefin shrink tube or epoxy resin to protect the windings from moisture and physical damage. * **Design:** Fixed inductor with a wound wire around a ferrite drum core. --- ### 4. Common Applications Due to its high inductance but relatively low current rating, this part is used for: 1. **Filtering:** Smoothing out ripples in DC-DC converters and power supplies. 2. **RF Choking:** Blocking high-frequency noise in electronic circuits. 3. **Signal Conditioning:** Used in timing circuits or oscillators. 4. **EMI Suppression:** Reducing electromagnetic interference in consumer electronics. ---