This document introduces the CDRH series SMD power inductors from Sumida, including three types: CDRH4D18, CDRH4D18C, and CDRH4D18C/LD. The features of the products include small size, low height, custom design options, magnetically shielded construction, and suitability for DC-DC converter inductors in mobile phones, PDAs, MP3 players, HDDs, DSC/DVCs, notebook PCs, etc.