Microhm, a specialist manufacturer of shunt resistors and precision resistors, announced to broaden its extensive line of high-power wirewound resistors, with a new series of rugged metal-clad wire wound resistors that deliver high levels of performance and a reduction in the need for heatsinking.

 
They are also significantly less sensitive to heatsink requirements than a comparable TO-packaged device of a similar power rating, many of which may require a cold plate to operate at the same rated power. The LHR series’ high level of performance is largely due to the use of ceramic cores rather than fiberglass: ceramic delivers benefits over fiberglass in efficiency by dealing with heat more effectively with overload and current surge events.
 
Encased in aluminum, the new LHR series offers power ratings to 300 watts. These highly durable and rugged components provide exceptional heat transfer and short-circuit performance. Other features include: a resistance range from 0.1Ω to 33KΩ; tolerances of 0.1% to 10%, making the series suitable for a range of applications; quick-connect terminations.

 
The devices target a range of industrial and other commercial applications including power conversion systems, motor drives, HVAC systems and battery charging and monitoring applications.