Optional accessories for the NZM circuit breaker series offer an extensive portfolio of application options for worldwide use. Installation is flexible and easy thanks to modular function groups. Notes: Type suffix and type contain parts for a switch side at the top or bottom for 3- or 4-pole switches. O = mounted at the top. U = mounted at the bottom. Can be used for: NZM2(-4), PN2(-4), N2(-4)