Switch disconnector with fuses — 160 A, AC23A, 120 kA
The Siemens 3NJ6303-4AB0.-.... is a SENTRON 3NJ63 switch disconnector with fuses in an in-line, 3-pole NH00 footprint rated for 160 A continuous current. Its AC23A duty at 500 V means it is designed to switch motor loads — including starting and stopping — not just isolation, so it handles the inrush and inductive kick of a motor circuit without derating. This part carries fuse monitoring (FM 10), so a blown fuse trips a local or remote signal — useful on a line where a single open phase could stop a conveyor or pump and you want the fault identified before the next start attempt.
RoHS compliance is confirmed since 27 September 2019, and REACH Article 33 information is available on request.
The 3-pole block occupies roughly the width of three NH00 fuse bases side by side. Fuse monitoring (FM 10) adds a signal contact that can be wired back to a PLC input or a local indicator lamp — plan for one additional control wire per pole.