The **SCEP134H-R30** is a high-current, surface-mount (SMD) power inductor commonly used in DC/DC converters and power supply modules. It is part of the SCEP134H series manufactured by companies like **Bel (Signal Transformer)** or **Sumida**. ### 1. Technical Specifications The "R30" in the part number signifies the inductance value. Below are the primary electrical characteristics: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.30 µH (Microhenries) | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~1.10 mΩ (Typical) | | **Saturation Current ($I_{sat}$)** | ~56.0 A | | **Heating Current ($I_{rms}$)** | ~32.0 A | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Key Design Features * **Magnetic Shielding:** The part is magnetically shielded, which minimizes Electromagnetic Interference (EMI) and prevents the inductor from affecting nearby sensitive components. * **High Current Capability:** Due to its flat-wire construction and large core, it can handle very high saturation currents (over 50 Amps) without the inductance dropping significantly. * **Low DCR:** The extremely low DC resistance ensures minimal power loss through heat, making it highly efficient for high-power applications. * **SMD Package:** Designed for automated pick-and-place assembly with a footprint of approximately 13.4mm x 13.4mm. --- ### 3. Common Applications The SCEP134H-R30 is typically found in environments requiring high efficiency and high current density: * **Voltage Regulator Modules (VRMs):** Used in CPU/GPU power delivery on motherboards. * **DC/DC Converters:** Point-of-Load (POL) converters for telecommunications and industrial equipment. * **Battery Powered Systems:** High-efficiency power management for portable heavy-duty electronics. * **Solar Inverters:** Power stage filtering. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **SCEP** | Series Type (High Current Power Inductor) | | **134H** | Case Size (Approx 13.4mm x 13.4mm x 8.0mm) | | **R30** | Inductance value (R denotes decimal: 0.30µH) |