New Dual Winding Inductors for High Current Applications

Share Article

HM78D series extended to higher inductance, better efficiency and superior current handling in a shielded low-cost part

TT electronics BI Technologies has extended its HM78D family of dual winding inductors with the introduction of a new model series offering higher inductance, better efficiency and superior current handling in a rugged, low cost part. The new HM78D-1210 series comes in 12.5mm footprint shielded SMD packages and, in common with other HM78D models, can be configured as inductors, common mode chokes or DC/DC converters.

With dual windings the package is suited to a broad range of applications including DC-DC single-ended primary-inductor converters (SEPIC), non-isolated voltage regulators, point of load modules, LED drivers and I/O filter chokes. The HM78D-1210 models offer inductance values from 4.7 to 470µH in parallel configuration; 18.8 to 1880µH in series.

Low resistance values ensure high-efficiency designs for SEPICs, whilst the high current ratings enable designers to save space on the PCB. Maximum DC resistance ranges from 0.014 to 0.57ohm with leads connected in parallel, 0.056 to 2.28ohm in series. In parallel, rated current is from 1.22 to 10.6A, with saturation currents 1.8A to 18.0A. Equivalent ratings in series mode are half these values.

Housed in rugged and cost-efficient packages, the lead-free devices feature shielded construction to enhance EMI performance. Operating temperature ranges from -40°C to +125°C and the inductors are supplied in tape-and-reel format for automated production.

For further information and data sheet downloads please visit:

About TT electronics PLC
TT electronics plc is a focused, global electronics group supplying leading manufacturers in the defence, aerospace, medical, transportation and industrial markets. The Group consists of four divisions: Components, Sensors, Secure Power and Integrated Manufacturing Services, each delivering technology, products and services to customers in target markets worldwide. TT electronics plc operates from headquarters based in Weybridge, Surrey, with more than 20 global manufacturing locations and more than 6,000 employees worldwide.
Additional information is available from our corporate website:

Share article on social media or email:

View article via:

Pdf Print

Contact Author

Tiana Dixon

(503) 708-1925
Email >
Visit website