Switch disconnector with fuses — 160 A, AC23A, 120 kA
The Siemens 3NJ6303-4AA0.-.... is a SENTRON 3NJ63 switch disconnector with fuses in an in-line design. It carries a 160 A rating for AC23A duty at 500 V, with a 120 kA breaking capacity at AC 500 V — that means it can safely interrupt fault currents up to 120 kA under worst-case short-circuit conditions, which covers most industrial distribution panels fed by a transformer of moderate size. The NH00 fuse holder accepts standard 00-size fuse links. This is a 3-pole unit, so it switches all three phases simultaneously.
RoHS compliant since 27 September 2019. REACH candidate list information is available on request.