The **ASPI-4122S-R45** is a surface-mount (SMD) power inductor manufactured by **Abracon**. This specific part is designed for high-density power supply circuits where space is limited but performance requirements are high. --- ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the ASPI-4122S-R45: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.45 µH | | **Tolerance** | ±30% (Standard for high-current inductors) | | **DC Resistance (DCR)** | ~13 mΩ (Max) | | **Saturation Current (Isat)** | ~7.3 A | | **Temperature Rise Current (Irms)** | ~5.3 A | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 4.1mm x 4.1mm x 2.2mm (Shielded) | --- ### 2. Key Features * **Magnetically Shielded:** The construction includes a magnetic shield that minimizes Electromagnetic Interference (EMI), making it ideal for noise-sensitive environments. * **Low Profile:** With a height of only 2.2mm, it is suitable for thin electronic devices like tablets and ultra-portable laptops. * **High Power Density:** Capable of handling relatively high current (7.3A Saturation) despite its small 4x4mm footprint. * **Surface Mount Design:** Optimized for automated pick-and-place assembly. --- ### 3. Application Areas The ASPI-4122S series is typically used in DC-to-DC conversion circuits. Specific applications include: * **Switching Regulators:** Used as a storage element in Buck (Step-down) or Boost (Step-up) converters. * **Mobile Electronics:** Power management for smartphones, tablets, and wearables. * **Computer Peripherals:** SSDs, graphics cards, and motherboard voltage regulator modules (VRMs). * **Communication Equipment:** Small base stations and networking hardware. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **ASPI**: Abracon Shielded Power Inductor series. * **4122S**: Dimensions (Approx. 4.1mm x 4.1mm x 2.2mm). * **R45**: Inductance value (R = decimal point; 0.45 microhenries).