The **PCMB104T-R56MT** is a high-current, surface-mount (SMD) power inductor commonly used in DC-DC converters and power supplies. It belongs to the PCMB family, characterized by its molded metal powder construction. --- ### ## Technical Specifications Below are the key electrical and physical parameters for this specific component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.56 µH | | **Tolerance** | ±20% (indicated by 'M') | | **DC Resistance (DCR)** | ~1.6 mΩ (Typical) / 1.8 mΩ (Max) | | **Saturation Current (Isat)** | ~33.0 Amperes | | **Heat Rating Current (Irms)** | ~25.0 Amperes | | **Case Size** | 104T (approx. 11.5 x 10.0 x 4.0 mm) | | **Operating Temp** | -55°C to +125°C | --- ### ### Part Number Breakdown Understanding the nomenclature helps in identifying equivalent parts: * **PCMB**: Series name (Metal Molded Power Inductor). * **104T**: Dimensional code (10mm width, 4mm height). * **R56**: Inductance value (R denotes decimal point; R56 = 0.56 µH). * **M**: Tolerance code (M = ±20%). * **T**: Packaging style (typically Tape & Reel). --- ### ### Key Features & Applications #### Features 1. **Shielded Construction:** The molded iron powder core provides magnetic shielding, which significantly reduces Electromagnetic Interference (EMI). 2. **High Saturation:** Unlike ferrite inductors, these have a "soft" saturation characteristic, allowing them to handle high peak currents without a sudden drop in inductance. 3. **Low DCR:** The use of flat or heavy-gauge copper wire inside minimizes power loss and heat generation. #### Applications * **Voltage Regulator Modules (VRM):** Used in CPUs and GPUs for high-speed switching. * **Laptops/Servers:** High-density power supplies where space is limited. * **DC/DC Converters:** Point-of-load (POL) converters requiring high efficiency. --- ### ### Schematic Representation In a circuit diagram, this part is represented as a standard inductor with two terminals. ```spice * Typical Buck Converter Implementation VIN 1 0 DC 12V SW 1 2 S1 (Switching Node) L1 2 3 0.56uH ; <--- PCMB104T-R56MT C1 3 0 100uF RL 3 0 Load ```