XAL4040-103MEC

• Inductance of 10µH with 20% tolerance, Measured at a 100 Kilohertz Test Frequency
• Shielded construction, Containing the Magnetic Field to Limit Radiated Interference
• Composite Core with Wirewound Construction
• Rated for 3.1A Maximum DC Current and 3.1A RMS, with a 3A Saturation Current
• DC Resistance of 92.4mΩ and a Self-Resonant Frequency of 24 Megahertz
• Surface-Mount Body 4.3mm Square and 4.1mm high, on Tape and reel; RoHS Compliant but Declared as Containing Lead

The Coilcraft XAL4040-103MEC is a 10µH shielded wirewound power inductor with a composite core, rated for 3.1A of DC and RMS current and a 3A saturation current. Its DC resistance is 92.4mΩ, its inductance tolerance is 20%, and its self-resonant frequency is 24 megahertz. The XAL4040-103MEC measures 4.3mm square by 4.1mm high, is supplied on tape and reel, and operates from -40°C to 125°C.

The inductor is the energy-storage element in a switching regulator: it takes current from the switch node during one half of the cycle and delivers it to the load during the other, and its saturation current sets the point past which it stops behaving like an inductor at all. A shielded composite-core part such as the XAL4040-103MEC keeps that field contained, so it can be placed near sensitive analogue or radio circuitry without coupling switching noise into it. At 10µH and 3A it fits buck converter output stages in the low-amp range: point-of-load supplies on industrial and computing boards, DC-DC modules, LED drivers, and battery-powered equipment. Typical buyers are power supply and embedded board designers who need a low-resistance inductor in a compact 4.3mm footprint.