The **RL1011-151-R** is a specific model of a **Radial Leaded Inductor** (Fixed Inductor) manufactured by Bourns Inc. It belongs to the RL1011 series, which is designed for applications requiring high saturation current and durability. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the component's specifications: | Segment | Meaning | Value | | :--- | :--- | :--- | | **RL1011** | Series Name | High-current radial leaded inductor | | **151** | Inductance Code | 150 µH (15 followed by 1 zero) | | **-R** | RoHS Compliance | Compliant with Lead-Free standards | --- ### 2. Key Technical Specifications Below are the typical electrical and physical characteristics of the RL1011-151-R: | Property | Specification | | :--- | :--- | | **Inductance** | 150 µH | | **Tolerance** | ±10% (typical for this series) | | **DC Resistance (DCR)** | ~0.260 Ω (Max) | | **Rated Current (Idc)** | ~1.30 A | | **Core Material** | Ferrite | | **Mounting Type** | Through-Hole (Radial Leads) | | **Operating Temperature** | -30°C to +100°C | --- ### 3. Physical Construction * **Form Factor:** It is a "power inductor" with a cylindrical shape. * **Coating:** Usually wrapped in a polyolefin shrink tube to protect the windings and provide insulation. * **Leads:** Two tinned copper leads protruding from the bottom for through-hole PCB mounting. --- ### 4. Common Applications The RL1011 series is versatile and generally used in power management circuits: 1. **DC/DC Converters:** Used for energy storage and voltage regulation. 2. **Power Supplies:** Acts as a filter to smooth out ripples in the output current. 3. **EMI/RFI Filtering:** Reduces electromagnetic interference in consumer electronics. 4. **Output Chokes:** Used in switching power supplies to maintain steady current flow. --- ### 5. Selection Considerations When replacing or designing with this part, keep the following in mind: * **Saturation Current:** Ensure the peak current in your circuit does not exceed the rated current, or the inductance will drop significantly. * **Spacing:** Because it is a radial component, ensure there is enough vertical clearance on the PCB. * **DCR:** Lower DC Resistance is preferable to minimize power loss as heat.