The **UP1B-150-R** is a power inductor manufactured by Eaton (formerly Bussmann/Coiltronics). It is part of the Uni-Pac (UP) series, designed specifically for surface mount applications requiring high energy storage and efficiency. ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the UP1B-150-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 15.0 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 1.9 Amps | | **Saturation Current (Isat)** | 2.0 Amps | | **DC Resistance (DCR)** | 0.052 Ohms (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | Surface Mount (SMD) | | **Shielding** | Non-Shielded | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying the component's attributes: * **UP1B**: The series designation (Uni-Pac size 1B). * **150**: The inductance code. The first two digits (15) are the value, and the third (0) is the multiplier. $15 \times 10^0 = 15$ µH. * **R**: Indicates that the part is RoHS compliant (Lead-free). --- ### 3. Key Features and Construction * **Material**: It typically uses a ferrite core, which provides high efficiency and low core losses at high frequencies. * **Design**: The "Uni-Pac" shape is optimized for high-density power applications. Its flat-top design makes it suitable for automated "pick-and-place" assembly. * **Robustness**: Designed to handle high-frequency fluctuations, making it ideal for modern switching power supplies. --- ### 4. Common Applications The UP1B-150-R is commonly found in the following electronic circuits: 1. **DC-DC Converters**: Used for energy storage in buck, boost, or buck-boost regulators. 2. **Input/Output Filtering**: Helps smooth out current ripples and reduce electromagnetic interference (EMI). 3. **Consumer Electronics**: Found in laptops, handheld devices, and battery chargers. 4. **Industrial Equipment**: Used in distributed power systems and telecommunications. ---