NSX breakers do not have a B, C or  D tripping curve, this is because the magnetic setting of the breaker is set by the trip unit. Also some of the NSX breakers are fitted with variable Thermal or Thermal and Magnetic overload trip units (Micrologic).
Tripping curves B, C & D refer mainly to the miniature circuit breakers which have a fixed characteristic.

Released for: Schneider Electric Ireland