HM79M Surface Mount Power Inductors TT Electronics HM79M Surface Mount Power Inductors feature a 12.5A maximum current rating, 7mΩ to 13Ω resistance range, and 3MHz operating frequency. The HM79M has a ferrite core and a wide temperature range, making this power inductor ideal for high-power density applications. TT Electronics HM79M Surface Mount Power Inductors operate in the -55°C to +125°C temperature range and work in DC-DC converters and EMI/low pass DC-filter applications.