Murata Launches Miniature Low-EMI Toroidal Power Inductor for Wearables and Low-Power IoT Equipment

February 28, 2026, Kyoto, Japan Murata Manufacturing Co., Ltd., the global leader in chip passive components, expanded its magnetic component product portfolio and launched a new ultra-miniature shielded toroidal power inductor series, targeting smart watches, wireless earbuds, portable medical sensors, smart home IoT nodes and other ultra-space-limited battery-powered consumer electronic products. Consumer wearable equipment is continuously developing towards thinner and smaller structural design, leaving extremely narrow layout space for power management inductors. 

Murata’s new toroidal power inductor adopts micro-precision automatic winding technology and miniaturized nanocrystalline toroidal core, with the smallest outer diameter only 3mm and overall height controlled below 1.5mm, which is one of the smallest commercial power inductors in the current market. Even with ultra-compact size, this toroidal power inductor can maintain stable inductance output under fluctuating load current, and ultra-low DCR design effectively slows down battery power consumption, extending the single-charge service time of wearable devices by about 8%. 

The closed toroidal core fundamentally suppresses magnetic leakage of the toroidal power inductor, avoiding electromagnetic crosstalk with Bluetooth, GPS and other sensitive RF circuits inside miniature equipment, eliminating the need for additional shielding layers and further saving PCB layout space. Murata’s market research predicts that the global shipment volume of low-power IoT equipment will exceed 40 billion units within five years, and miniaturized low-noise toroidal power inductor will become the mainstream power filtering component of such products. At present, the miniature series has realized full mass production and global standardized supply chain distribution.