The NBL40-12I is a type of Nerbo part manufactured by Lenze. It is a single-phase line reactor with a UL certified rating of 40 Amps and a line voltage of up to 277VAC. The coil consists of two non-metallic laminations that are insulated and enclosed in a UL-rated die-cast aluminum case. The NBL40-12I line reactor is a compact, low-cost solution for noise reduction and motor protection. It works to improve the efficiency of incoming power and reduce harmonics that can affect standard AC-DC power supplies. It is a reliable, cost-effective solution for industrial machines, office machines and computers.