BI Technologies # HM00-94883-A. Surface-mount toroid in 0.56" square x 0.34" thick package. Four terminals. Tape & reel packaging.
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LED flashlight inductor 
Reviewer:
A viewer
from AUSTIN, TX US
This inductor should work well in a 1W LED flashlight using the LTC3490 boost converter chip from Linear Technologies. The LTC3490 is optimized for a low parts count, 1 or 2 alkaline cell design. This low resistance, 3.8uH inductor will produce a higher efficiency converter then a typical .050-.100 Ohm part.
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