This toroid-type transformer (without primary) is designed for indoor and outdoor service. It is manufactured using highly specialised methods and is vacuum-moulded with suitably processed epoxy resin.
Indoor Service J1FA J1FC J5FB (indoor and outdoor service)
Outdoor Service J5FB (indoor and outdoor service) J_FD J1FL
Benefits
Highly resistant to aging
Mechanically very sturdy
Imperceptible effects due to temperature variations