## Technical Overview: SD3114-151-R The **SD3114-151-R** is a high-performance, low-profile power inductor designed for surface-mount (SMD) applications. It belongs to the **SD3114 series** manufactured by Eaton (formerly Bussmann). --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 150 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 4.410 Ω (Typical) | | **Rated Current (Irms)** | 0.237 Amperes | | **Saturation Current (Isat)** | 0.224 Amperes | | **Shielding** | Shielded (Magnetic) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Characteristics The "3114" in the part number refers to its physical dimensions, which are critical for compact PCB layouts. * **Footprint:** Approximately 3.1mm x 3.1mm. * **Height:** 1.45mm (Max). * **Packaging:** Tape and Reel (indicated by the "-R" suffix). * **Core Material:** Ferrite, which provides high efficiency and low core losses. --- ### 3. Electronic Function & Features The SD3114-151-R is engineered for modern power management circuits: * **Magnetic Shielding:** The part is shielded to minimize Electromagnetic Interference (EMI). This is vital for high-density boards where components are placed close together. * **High Power Density:** Despite its small 3x3mm footprint, it handles significant energy, making it ideal for space-constrained electronics. * **Low Core Loss:** Ferrite construction ensures that energy wasted as heat is kept to a minimum during high-frequency switching. --- ### 4. Typical Applications This component is commonly found in battery-powered and portable devices, including: 1. **DC-DC Converters:** Used in "Buck" (step-down) or "Boost" (step-up) regulators. 2. **LED Drivers:** Providing stable current to high-brightness LEDs. 3. **Smartphones & Tablets:** Powering internal subsystems like RF modules or displays. 4. **Wearables:** Due to its ultra-low profile (1.4mm height). --- ### 5. Part Number Breakdown `SD3114 - 151 - R` * **SD3114:** Series identifier (Size: 3.1 x 3.1 x 1.4 mm). * **151:** Inductance value code. The first two digits (15) are the value, and the third (1) is the number of zeros. (150 µH). * **-R:** RoHS compliant and Tape/Reel packaging.