The Eaton NSB FD1040L Molded Case Breaker (MCCB) is a molded case circuit breaker in Eaton’s NSB family, identified by the FD1040L model. This MCCB provides overcurrent protection for electrical circuits in distribution panels and related industrial or commercial installations. The FD1040L designation specifies the exact unit within Eaton’s NSB FD-series lineup.
