Crouse-Hinds NSB QC2020 Miniature Circuit Breaker

Crouse-Hinds NSB QC2020 Miniature Circuit Breaker is a two-pole overcurrent protection device in the NSB family, rated at 20 A. The QC2020 model supports 50/60 Hz operation and is described for use in 3-phase configurations. As a miniature circuit breaker, it automatically interrupts current in the event of an overload or short circuit to protect conductors and connected equipment in electrical panels or enclosures that require two-pole protection. The two-pole design ensures simultaneous disconnection of two conductors, providing straightforward protection for circuits specified as 2P 20 A in 3-phase systems. This part number identifies a distinct device within the Crouse-Hinds NSB lineup, intended where a 2P, 20 A MCB compatible with 50/60 Hz service and 3-phase configurations is specified.