What this 4-pole RCD does on the line
Instantaneous design means no intentional time delay; it trips as soon as the residual exceeds the threshold.
The headline 63 A AC rating is at the reference ambient — but the part derates in warmer cabinets: 58.6 A at 40 °C, 58.59 A at 45 °C, 56.7 A at 50 °C, 54.81 A at 55 °C, 53.55 A at 60 °C, 52.29 A at 65 °C, and 50.4 A at 70 °C. The 300 mA residual threshold is fixed — not adjustable — and the OFF-delay is not adjustable either, so this is a straight instantaneous trip, not a time-delay S-type unit. Insulation voltage (Ui) is rated 460 V, surge voltage resistance 4 kV. The operating frequency is fixed at 50 Hz.
Fastening method is REG (regular DIN-rail clip). Mounting position is any orientation. Depth is 70 mm, height 90 mm, width 123 mm overall.