The **1276AS-H-R68M** is a high-performance, surface-mount (SMD) power inductor commonly used in DC-DC converter circuits. It belongs to the **DFE252012** series, originally manufactured by **Murata** (formerly TOKO). --- ### 1. Key Technical Specifications The alphanumeric code provides specific details about the component's performance characteristics: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.68 µH | | **Tolerance** | ±20% (indicated by 'M') | | **Case Size** | 2520 (Metric) / 1008 (Inch) | | **Dimensions** | 2.5mm x 2.0mm x 1.2mm (max height) | | **DC Resistance (DCR)** | ~28 mΩ (Max) | | **Rated Current (Isat)** | ~4.7 A (Saturation current) | | **Rated Current (Itemp)** | ~3.8 A (Temperature rise current) | | **Construction** | Metal Alloy (Magnetic Shielded) | --- ### 2. Structural Features The part is designed with a **Metal Alloy core** technology, which offers several advantages over traditional ferrite inductors: * **Magnetic Shielding:** The molded construction minimizes electromagnetic interference (EMI) with surrounding components. * **Soft Saturation:** Unlike ferrite cores that lose inductance abruptly when current limits are exceeded, metal alloy cores show a gradual drop in inductance, improving circuit stability. * **High Current Density:** Its compact footprint (2.5x2.0mm) can handle significantly higher currents compared to older wire-wound technologies. --- ### 3. Common Applications This inductor is typically found in portable and space-constrained electronics: 1. **Smartphones & Tablets:** Used in the power management integrated circuits (PMIC) to regulate voltage for CPUs and GPUs. 2. **Laptops/Wearables:** Ideal for high-efficiency buck-boost converters. 3. **IoT Modules:** Used in RF modules where low profile and high efficiency are critical. --- ### 4. Part Number Breakdown * **1276AS:** Series designator (DFE252012F family). * **H:** High reliability/standard characteristic. * **R68:** Inductance value (R represents the decimal point = 0.68). * **M:** Tolerance code (M = ±20%). ---