Siemens 5SJ4310-7HG42 — 3-Pole C-Curve MCB for Standard Panel Duty
The C characteristic (5–10× In magnetic trip) suits mixed resistive-inductive loads like motor starters, contactor coils, and lighting banks where inrush is moderate.
Operating temperature range -40 to 75 °C, with 95% humidity max. Vibration tested to 50 m/s² at 25–150 Hz and 60 m/s² at 35 Hz (4 sec).
Sourcing and Cross-Reference
The 5SJ4310-7HG42 is an active SENTRON 5SJ4 series part. For a BOM freeze or second-source gate, the closest functional peer within the same manufacturer is the 5SY4140-7 — same 3-pole C-curve form factor, same 3 MW units, but check the specific breaking capacity and voltage ratings against your application before substituting. No rewiring required for the panel footprint.