B curve and 30 mA trip — what they mean on the line
The A9D37216: The B curve (magnetic tripping limit 3–5 x In) means the unit trips instantaneously between 48 A and 80 A. That suits circuits with resistive or lightly inductive loads — lighting, small heaters, control transformers — where inrush is modest. The 30 mA residual sensitivity is the standard for personnel protection (shock hazard) per IEC 60364. On a distribution outgoer, this RCBO protects both the cable and the person touching the load side.
Panel integration
Clip-on DIN rail mounting, 36 mm wide (4 x 9 mm pitches), 78 mm deep. IP40 in a distribution enclosure, IP20 bare. The toggle provides local ON/OFF and fault-trip indication.
