The **MPT412-R33H1** is a high-performance, surface-mount (SMD) **Molded Power Inductor**. These components are specifically designed for high-current applications where space is limited and efficiency is critical. --- ### 1. Key Technical Specifications Based on the standard nomenclature for the MPT series, here are the estimated technical parameters: | Parameter | Specification (Typical) | |:---|:---| | **Inductance** | 0.33 µH (indicated by "R33") | | **Tolerance** | ±20% | | **Case Size** | Approx. 4.0 x 4.0 mm (indicated by "412") | | **DCR (DC Resistance)** | Very Low (typically < 5-10 mΩ) | | **Saturation Current** | High (typically 10A - 20A range) | | **Construction** | Metal Alloy / Powdered Iron Core | --- ### 2. Core Electronic Features The MPT412-R33H1 utilizes a **molded construction** technology, which provides several advantages over traditional wire-wound inductors: * **Shielded Construction:** The molded body acts as a natural magnetic shield, significantly reducing Electromagnetic Interference (EMI). * **High Saturation:** Unlike ferrite cores that have a "sharp" saturation drop, the metal alloy powder used in this part offers "soft saturation," allowing it to handle high current spikes without a total loss of inductance. * **Low Profile:** The "412" designation suggests a small footprint with a height usually around 1.2mm to 2.0mm, making it ideal for slim electronic devices. * **Stability:** It maintains stable performance across a wide temperature range (typically -40°C to +125°C). --- ### 3. Common Applications Due to its low inductance (0.33µH) and high current capability, it is primarily used in **high-frequency DC-DC converters**: 1. **Voltage Regulator Modules (VRM):** Used in CPUs and GPUs for rapid power delivery. 2. **Point of Load (POL) Converters:** Found in telecommunications and server hardware. 3. **Mobile Electronics:** Smartphones and tablets where high efficiency is required to preserve battery life. 4. **Automotive Infotainment:** Powering internal screens and sensors. --- ### 4. Part Number Breakdown ```text MPT 412 - R33 H 1 | | | | | | | | | +-- Design Revision/Internal Code | | | +---- Tolerance/Material Grade | | +-------- Inductance Value (R33 = 0.33 µH) | +-------------- Case Dimensions (4.0mm x 4.0mm) +------------------ Series Code (Molded Power Inductor) ```