The **M8RS-166-R** is a high-performance, shielded power inductor manufactured by **Eaton (formerly Coiltronics)**. It is part of the MPI4040 series, specifically designed for high-density power applications where space and efficiency are critical. --- ### 1. Key Technical Specifications The following table highlights the primary electrical and physical characteristics of the M8RS-166-R: | Parameter | Value | | :--- | :--- | | **Inductance** | 16.0 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | ~2.5 A to 3.0 A (Typical) | | **Saturation Current (Isat)** | ~3.2 A | | **DC Resistance (DCR)** | ~90 mΩ (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 4040 (4.0mm x 4.0mm x 2.0mm) | | **Shielding** | Magnetically Shielded | --- ### 2. Core Features * **Composite Molded Construction:** The inductor uses a metal powder core material. This allows for a "soft" saturation characteristic, meaning the inductance drops gradually rather than abruptly as current increases. * **High Efficiency:** It features low DCR (DC Resistance) which minimizes power loss through heat, making it ideal for battery-operated devices. * **Low EMI:** Because it is magnetically shielded, it minimizes electromagnetic interference (EMI) with surrounding components on the PCB. * **Rugged Design:** The molded structure provides high resistance to mechanical shock and vibration. --- ### 3. Typical Applications The M8RS-166-R is commonly found in modern electronics requiring compact power management: 1. **DC-DC Converters:** Used as the energy storage element in buck (step-down) or boost (step-up) converters. 2. **Portable Electronics:** Found in tablets, smartphones, and handheld gaming consoles due to its low profile (2mm height). 3. **Computing:** Used in VRM (Voltage Regulator Module) circuits for CPUs and GPUs in laptops. 4. **LED Lighting:** Driver circuits for high-brightness LEDs. --- ### 4. Part Number Breakdown * **M8RS:** Series designation (High current, molded inductor). * **166:** The inductance code. "16" is the significant figure, and "6" usually denotes the multiplier or specific sub-series variant (leading to 16µH). * **R:** Indicates RoHS compliance (Lead-free).