Current sense resistor from Ohmite combines two technologies
Expanding its metal foil/metal element construction into higher power levels, Ohmite has combined the internal technology of their new FCSL Series with the TO-220 packaging of their TBH Series to achieve handling in excess of 25A. This creates a resistor which is designed for a variety of applications requiring intermediate heatsinkable power at an economical price.
The low TCR characteristics of the FCSL construction, using pure Ni-Cu alloys, result in a much more stable resistor than the thick film construction used by other manufacturers for low current sensing values.
At the same time, a competitive price against other metal foil TO-220 products is achieved by marrying these two established technologies into one integrated design in which the resistance element is electrically insulated from metal heat sink mounting tab
With an operating temperature range of -55°C to +150°C and a temperature coefficient of
0.03-10Ω @ ±100ppm, 11Ω-10KΩ @ ±50ppm, the new TBH has a resistance range of 0.03Ω - 10KΩ and a maximum operating voltage of 350V.
Applications for the new resistors include power supplies, industrial controls, automotive steering, pre-load/damping, snubber/bleeder and current sensing.
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