Switch disconnector with fuses for panel integration
The 3NJ6303-3AB0.-....: The Siemens 3NJ6303-3AB0 is a 3-pole switch disconnector with fuses from the SENTRON 3NJ63 family, rated 160 A in NH00 fuse size. It carries an AC23A 500 V switching duty, meaning it handles motor loads including starting and stopping under load — the heaviest utilization category for switch-disconnectors under IEC 60947-3. The in-line design mounts directly into a panel busbar system, with pluggable NH00 fuse bases for quick fuse replacement without unbolting conductors. The integral EFM 10 electronic fuse monitoring signals a blown fuse via a remote contact — useful for a panel builder wiring a fault indication back to a PLC input, saving a separate fuse-monitor relay. This is a C-class product (manufactured to order), so it is not a stocked shelf item. The active lifecycle status means the factory continues to accept orders without an end-of-life notice.
RoHS compliant since 27 September 2019, with REACH Article 33 duty-to-inform documentation available on request.