## Technical Overview of UP1B-6R8-R The **UP1B-6R8-R** is a high-performance, surface-mount (SMD) power inductor manufactured by **Eaton (formerly Bussmann/Coiltronics)**. It is part of the Uni-Pac (UP) series, designed specifically for applications requiring high energy storage and low power loss. ### 1. Key Specifications | Feature | Specification | | :--- | :--- | | **Inductance** | 6.8 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 3.3 Amps | | **Saturation Current (Isat)** | 3.9 Amps | | **DC Resistance (DCR)** | 0.0347 Ohms (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | Non-Standard SMD (Uni-Pac 1B) | --- ### 2. Physical Construction The UP1B-6R8-R is constructed using a **ferrite drum core** with a copper wire winding. * **Shielding:** It is an unshielded design, which allows for higher saturation currents in a smaller footprint but requires careful PCB placement to avoid EMI (Electromagnetic Interference) issues with sensitive components. * **Termination:** It features robust solderable pads designed for automated pick-and-place assembly. --- ### 3. Core Applications This inductor is commonly used in power management circuits where voltage conversion is necessary. * **DC-DC Converters:** Used in Buck (Step-down), Boost (Step-up), and SEPIC topologies. * **Voltage Regulator Modules (VRMs):** Found in computing and telecommunications hardware. * **Battery Powered Equipment:** Handheld devices where efficiency is critical to battery life. * **Industrial Electronics:** Providing stable current for sensors and microcontrollers. --- ### 4. Part Number Breakdown | Prefix | Size Code | Inductance Code | RoHS Status | | :--- | :--- | :--- | :--- | | **UP** | **1B** | **6R8** | **-R** | | Uni-Pac Series | Physical Dimensions | 6.8 Microhenries (R = Decimal) | RoHS Compliant | --- ### 5. Design Considerations When implementing the UP1B-6R8-R in a circuit, engineers should consider the following: * **Self-Resonant Frequency (SRF):** Ensure the operating frequency of your switching regulator is well below the SRF of the inductor to maintain inductive behavior. * **Thermal Management:** The 3.3A rating is based on a temperature rise (usually 40°C). Ensure adequate airflow or copper pour for heat dissipation. * **Magnetic Fields:** Since it is unshielded, avoid placing high-impedance signal traces directly underneath or immediately adjacent to the inductor.