Fastron xRCC Rod Core Chokes The Fastron xRCC Series Rod Core Chokes are available in a range of inductances (20% tolerance), lengths, currents, and other specifications.Fastron 3RCC Rod Core Chokes - lengths from 12-22mm, 1.8-9.0µH, 2.5-1.0A rated DC currentFastron 4RCC Rod Core Chokes - lengths from 20-25mm, 1.8-12.0µH, 10-2A rated DC currentFastron 5RCC Rod Core Chokes - lengths from 20-30mm, 2.5-25.0µH, 6.0-1.0A rated DC currentFastron 6RCC Rod Core Chokes - lengths from 25-30mm, 4.0-30.0µH, 10-2A rated DC current