BI Technologies Develops HM55A Series Inductors

The Magnetic Components Division of BI Technologies (Fullerton, CA), a subsidiary of TT electronics plc (Patterson, NJ), has developed a self-shielding molded inductor design that reduces acoustic noise level, delivers up to 40 A rated current, and is specified for operation to +155 °C. Designated the HM55A Series, the inductors are the latest addition to BI’s family of Toroid Terminator™ high-current inductors.

The HM55A Series inductors are suitable in multiple-phase synchronous step-down voltage regulator modules, motherboards for laptops and desktop computers, and for general-purpose inductor applications. Two case sizes of 0.406 in x 0.254 in x 0.228 in (16 mm x 10 mm x 9 mm) and 0.406 in x 0.254 in x 0.292 in (16 mm x 10 mm x 11.5 mm) are available. The inductors feature inductance values from 0.28 µH up to 2 µH (measured at 100 KHz, 0 Adc), with tolerance to ±10%. They are rated for 40 Adc current, with a maximum temperature rise of 50 °C. The dc resistance is 0.72 mΩ (±5%).

Pricing for the MH55A Series inductors starts at $0.28 each in volume quantities, with lead times from 8 to 10 weeks.