What the 16 A rating means for fit
The SH203T-C16: The 16 A rating per pole governs the continuous load it can carry without tripping. For a 3-pole breaker on a three-phase line, that means 16 A per phase — enough for a small motor branch, lighting subcircuit, or general-purpose distribution feeder. The thermal-magnetic trip curve (typically B, C, or D on this platform) determines inrush tolerance; the order code alone doesn't specify the curve, so confirm the trip characteristic against the load type before committing the BOM line.