### Technical Overview: UP3B-331-R The **UP3B-331-R** is a high-performance, shielded power inductor designed and manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the **Uni-Pac™ 3 (UP3B)** series, which is known for its rugged construction and high energy storage capabilities. --- ### Key Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 330 µH (Microhenries) | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.603 Ohms (Max) | | **RMS Current ($I_{rms}$)** | 0.81 Amps | | **Saturation Current ($I_{sat}$)** | 0.88 Amps | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | Surface Mount (SMD) | | **Material** | Ferrite Core | --- ### Core Features * **Magnetic Shielding:** The part is designed with a ferrite drum core and a sleeve to minimize Electromagnetic Interference (EMI), making it suitable for noise-sensitive circuits. * **High Power Density:** Provides a large amount of inductance and energy storage in a relatively compact surface-mount footprint. * **Rugged Construction:** Capable of withstanding high-temperature reflow soldering processes and harsh industrial environments. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and compliant with environmental standards. --- ### Typical Applications The UP3B-331-R is commonly found in power management circuits where stable voltage and noise filtration are critical. 1. **DC-DC Converters:** Used as a storage element in buck (step-down) or boost (step-up) converters. 2. **Filtering:** Acting as an LC filter to smooth out ripple current in power supplies. 3. **Industrial Electronics:** Used in motor controllers, sensors, and PLC power stages. 4. **Telecommunications:** Provides energy storage for base station power modules. --- ### Comparison with Similar Models | Model | Inductance (µH) | $I_{rms}$ (A) | DCR (Ω) | | :--- | :--- | :--- | :--- | | **UP3B-100-R** | 10 | 4.1 | 0.024 | | **UP3B-101-R** | 100 | 1.4 | 0.198 | | **UP3B-331-R** | **330** | **0.81** | **0.603** | ---