New Industry Products

1608mm Size Metal Alloy Chip Inductor

January 19, 2017 by Jeff Shepard

With the introduction of the DFE18SA series, Murata claims that the world's smallest metal alloy type 0603-inch (1608mm) size inductor, has now been achieved. These inductors have an operating temperature range of -40 to +125 degrees C and are available with Isat current ratings from 2000mA to 4200mA. Applications are expected to include power supplies for digital and RF circuits for mobile equipment.

The DFE18SA series offers outstanding current superposition characteristics in spite of its small size (characteristics are Isat=2A at 1uH, whereas they are Isat=0.55A at 1uH for products of the same size made using conventional monolithic methods). And low flux leakage as a result of closed magnetic path structure.

The following four devices are being introduced: DFE18SAN1R0ME0# with an inductance of 1.0µH, an Itemp of 1600mA, Isat of 2000mA and Rdc of 0.144Ω, maximum; DFE18SANR24ME0# with an inductance of 0.24µH, an Itemp of 3200mA, Isat of 4200mA, and Rdc of 0.036Ω, maximum; DFE18SANR47ME0# with an inductance of 0.47µH, an Itemp of 2400mA, Isat of 3100mA, and Rdc of 0.064Ω, maximum; and DFE18SANR56ME0# with an inductance of 0.56µH, an Itemp of 2200mA , Isat of 3000mA, and Rds of 0.084Ω, maximum.

Rated current (Isat) is specified when the decrease of the initial inductance value at 30%. (The ambient reference temperature is 20 degrees C). Rated current for temperature (Itemp) is specified when temperature of the inductor is raised 40 degrees C by dc current. (The ambient reference temperature is 20 degrees C).

As a result of components in mobile equipment becoming more densely mounted and incorporating more advanced functions, smaller components compatible with large currents are becoming increasingly important. Murata now brings to the market a 0603-inch (1608mm) size 0.24u to 1.0uH metal alloy type power inductor. Proprietary techniques that utilize the high performance of windings have been applied to greatly enhance the rated current (current superposition characteristics) over that of conventional monolithic power inductors.