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XAL4040-153ME - 15uH Shielded Power Inductor | Coilcraft
The Coilcraft XAL4040-153ME is a 15 µH molded high-temperature shielded power inductor rated for 2.8 A Irms with a typical DCR of 120 mOhm in a 4.0 x 4.0 mm surface-mount package, qualified to AEC-Q200 for automotive-grade environments. The metal-composite core and molded body deliver low core loss, soft saturation, and excellent DC-bias stability, making the part well-suited for multi-MHz synchronous buck and SEPIC converters in vehicle and industrial systems. What is a molded shielded power inductor? A power inductor is a passive magnetic component that stores energy in its magnetic field during the switch-on phase of a switching regulator and releases that energy into the load during the switch-off phase. Shielded inductors confine the magnetic flux inside a magnetic shield, reducing radiated EMI into nearby sensitive traces. The molded (composite) construction used by the XAL40xx family encapsulates the winding in a metal alloy composite that simultaneously shields the field and improves thermal conduction. In the power-management signal chain the inductor sits between the controller IC (PWM/PFM) and the output capacitor, forming the second stage of an LC low-pass filter. Molded inductors therefore live under the power management -> inductors -> shielded power inductors category, adjacent to discrete inductors, transformers, and chokes. Key features include an inductance of 15 µH ±20%, a self-resonant frequency above 5 MHz, an operating temperature range of -40 °C to +125 °C, and AEC-Q200 automotive qualification. The composite core allows the part to hold 80% of its zero-bias inductance at rated Irms, which translates to low ripple and predictable current limit margins in temperature-stressed applications. The XAL4040-153ME utilizes a flat wirewound winding on a pressed metal-composite core, bobbin-less for low-profile mounting. The 4 x 4 mm land pattern is JEDEC-compatible with standard 4040 footprints used by most low-voltage point-of-load regulators. Typical applications include automotive LED headlight drivers, infotainment system POL converters, ADAS sensor power rails, industrial PoL modules, and 48 V to 12 V intermediate bus converters. The combination of automotive-grade reliability and small footprint also supports handheld and IoT devices that demand rugged inductive components. When designing with this part, place the input and output capacitors as close to the regulator IC as the inductor allows, and verify saturation behavior at the worst-case DC bias and peak switching current rather than relying on the open-circuit inductance value alone. Thermal testing at maximum ambient is recommended for sealed enclosures. This page combines distributor pricing, drop-in alternatives, and design notes that go beyond the manufacturer datasheet, giving engineers a single source for sourcing decisions, lifecycle checks, and PCB-level trade-off analysis.
XFL3012-473MEB - 47µH Shielded Power Inductor 460mA | Coilcraft
The Coilcraft XFL3012-473MEB is a 47 µH shielded molded power inductor rated for 460 mA saturation current with a maximum DCR of 1.32 Ω, packaged in a compact 3.0 x 3.0 mm surface-mount 1212 (3030 Metric) footprint. As part of the XFL3012 family of ultra-low-profile molded inductors, the -443MEB suffix indicates 20% inductance tolerance (M) and an RoHS-compliant matte-tin-lead (e)BTE ground finish. The -443 construction uses a magnetic-shielded molded body to minimize stray flux and reduce EMI in dense PCB layouts. A power inductor is a passive component that stores energy in a magnetic field when current flows through its winding, then releases that energy to smooth current ripple in switching converters. The XFL3012 family uses a shielded, molded construction that confines flux inside the package body, allowing the inductor to be placed directly adjacent to noise-sensitive analog circuitry or other inductors without magnetic coupling. Compared to unshielded drum-core inductors, the XFL3012 achieves substantially lower AC losses and reduced audible noise. Key features of the XFL3012-473MEB include a 47 µH nominal inductance measured at 1 MHz and 0.1 Vrms, an Isat of 460 mA (DC current at 25 °C that causes a 30% inductance drop), a maximum DCR of 1.32 Ω, and a self-resonant frequency typically well above the audio band. The molded body is rated for operating temperatures up to +125 °C and is qualified to AEC-Q200 for automotive applications, making the part suitable for powertrain, ADAS, and infotainment power rails. The XFL3012 family is built around a flat-wire winding molded inside a composite magnetic material that simultaneously provides shielding and a mechanically robust body. The resulting part has the lowest profile in Coilcraft's molded power-inductor line, with a maximum seated height of approximately 1.2 mm, enabling placement under low-profile shields and inside compact modules such as wearables and camera PMICs. Typical applications include DC-DC converter output filters in automotive camera and radar PMICs, point-of-load regulators in industrial 24 V systems, Class-D audio amplifier output filtering, and battery-powered portable devices where shielded construction prevents interference with adjacent analog sections. When laying out a PCB, designers should leave at least 1 mm clearance to adjacent inductors and avoid routing high-di/dt traces directly under the part to minimize stray coupling even with the magnetic shield.