### Technical Overview: UP1B-470-R The **UP1B-470-R** is a power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the **Uni-Pac (UP)** series, which is designed for surface-mount applications requiring high energy storage and low power loss. --- ### 1. Key Technical Specifications The part number itself provides specific data regarding its electrical characteristics: | Parameter | Value | | :--- | :--- | | **Inductance** | 47 µH (Microhenries) | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.165 Ω (Typical) | | **Current Rating (Irms)** | 1.14 Amps | | **Saturation Current (Isat)** | 1.35 Amps | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD) | --- ### 2. Physical Construction The "UP1B" designation refers to the physical frame size and materials used in the component: * **Core Material:** Ferrite core, which offers high efficiency and low core losses at high frequencies. * **Shielding:** It is a **non-shielded** drum core inductor. This means it is cost-effective but may have some electromagnetic interference (EMI) leakage compared to shielded variants. * **Termination:** Lead-free (indicated by the **-R** suffix, denoting RoHS compliance). * **Dimensions:** Approximately 8.9mm x 6.1mm with a height of 5.0mm. --- ### 3. Common Applications The UP1B-470-R is primarily used in power management circuits where voltage needs to be regulated or filtered. * **DC-DC Converters:** Used in Buck (step-down), Boost (step-up), and SEPIC topologies. * **Output Filters:** Smoothing out ripple current in switching power supplies. * **Consumer Electronics:** Found in laptops, LED drivers, and battery-powered handheld devices. * **Industrial Equipment:** Used in distributed power systems where space is at a premium. --- ### 4. Circuit Diagram Representation In a typical schematic, the inductor acts as an energy storage element. Below is a simplified representation of its placement in a Buck Converter: ```text [Input Voltage] ----(Switch)----[ UP1B-470-R ]----[ Output ] | (Capacitor) | [Ground] ``` ---