The **ASPI-1306S-331M** is a high-power, surface-mount (SMD) power inductor manufactured by Abracon. It belongs to the ASPI-1306S series, which is characterized by its drum core construction and high current ratings. --- ### 1. Key Technical Specifications The part number follows a specific nomenclature that defines its electrical properties: | Parameter | Specification | | :--- | :--- | | **Inductance** | 330 µH | | **Tolerance** | ±20% (indicated by 'M') | | **DC Resistance (DCR)** | 0.52 Ω (Max) | | **Rated Current (Isat/Irms)** | ~0.80 A to 1.10 A (varies by thermal conditions) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 13.0 x 9.4 x 11.4 mm | --- ### 2. Component Structure and Features * **Core Material:** Ferrite drum core. Ferrite is used for its high magnetic permeability and low electrical conductivity, which reduces eddy current losses. * **Shielding:** This specific series (1306S) is generally **unshielded**. This means it is cost-effective but may have higher Electro-Magnetic Interference (EMI) emissions compared to shielded variants. * **Construction:** It uses a high-reliability wire-wound construction with a robust base for stable SMT (Surface Mount Technology) assembly. --- ### 3. Application Areas Due to its high inductance (330 µH) and physical size, this component is typically found in: 1. **DC-DC Converters:** Used for energy storage and filtering in power supplies. 2. **Telecommunications:** Power management modules for networking equipment. 3. **Industrial Electronics:** Providing stable power to sensors, controllers, and motor drivers. 4. **Consumer Electronics:** Used in televisions or large appliances where board space allows for a taller profile component. --- ### 4. Part Number Breakdown The part number **ASPI-1306S-331M** can be decoded as follows: * **ASPI:** Abracon Surface Power Inductor. * **1306S:** Dimensions (Approx. 13mm base width, 06 series height). * **331:** The inductance code. `33` followed by `1` zero = 330. Measured in microhenries (µH). * **M:** Tolerance code. `M` stands for ±20%. ---