The **FDV0618-H-R68M** is a high-current, shielded power inductor manufactured by **Murata** (formerly Toko). It is part of the FDV series, which is specifically designed for high-efficiency DC-DC conversion in space-constrained environments. --- ### 1. Key Technical Specifications The part number itself contains the primary specifications. Below is the breakdown of its electrical and physical characteristics: | Property | Value | Notes | | :--- | :--- | :--- | | **Inductance** | 0.68 µH | Rated at 100 kHz | | **Tolerance** | ±20% (M) | Standard tolerance for power inductors | | **DC Resistance (DCR)** | 4.4 mΩ (Max) | Very low resistance to minimize power loss | | **Saturation Current ($I_{sat}$)** | ~14.6 A | Current where inductance drops by 30% | | **Temperature Rise Current** | ~11.5 A | Current causing a 40°C temp rise | | **Operating Temp** | -40°C to +125°C | Suitable for industrial and automotive use | | **Dimensions (L×W×H)** | 7.3 x 6.7 x 1.8 mm | Low profile "0618" package | --- ### 2. Physical Construction & Features * **Magnetic Shielding:** The inductor is magnetically shielded. This prevents electromagnetic interference (EMI) from affecting surrounding components on the PCB. * **Metal Alloy Core:** Unlike traditional ferrite cores, this series uses a metal alloy powder. This provides **soft saturation** characteristics, meaning the inductance drops gradually rather than abruptly when current increases. * **Low Profile:** The "1.8mm" height makes it ideal for ultra-thin devices like laptops, tablets, and slim power modules. * **AEC-Q200 Qualified:** The "-H" designation often indicates high-reliability or automotive-grade compliance in Murata’s nomenclature. --- ### 3. Common Applications This part is typically found in the power stage of various electronic devices: 1. **Voltage Regulator Modules (VRMs):** Used in CPU/GPU power supplies for high-speed computing. 2. **DC-DC Converters:** Core component in Buck (step-down) converters to smooth out output current. 3. **Portable Electronics:** Used in smartphones and tablets due to its small footprint and high efficiency. 4. **Automotive Infotainment:** Powering sensors or displays where EMI shielding is critical. --- ### 4. Part Number Breakdown To help with sourcing or finding substitutes, here is the decoding logic: * **FDV**: Series name (Metal Alloy Shielded Inductor). * **0618**: Package size (approx. 6mm x 6mm footprint, 1.8mm height). * **H**: High reliability/Automotive specification. * **R68**: Inductance value (R68 = 0.68 microhenries). * **M**: Tolerance code (M = ±20%).