It's a 3-pole unit rated 63 A with 100 mA sensitivity, Type AC (trips on sinusoidal AC residual currents only), and it's designed for 230/400 V AC networks at 50/60 Hz. The standard it's built to is GB 16917.21, which is the Chinese national standard for RCDs — so if your panel is destined for a China-certified line, this part carries the right mark.
63 A rated current and 100 mA sensitivity: this RCD is sized for a subfeed or a group of loads where the total leakage to earth could be higher than a 30 mA device would tolerate (think industrial heaters, older motors with some winding leakage, or long cable runs). The voltage-independent tripping technology means the device doesn't need a separate power supply to open on a fault; it uses the fault energy itself, which is a reliability plus in a panel where losing control power shouldn't defeat the protection.
Clip-on mounting onto DIN rail, and it's designed as an outgoer add-on — it screws directly to the load side of an iC65 MCB. The 7 x 9 mm pitch means it occupies 7 module slots on the DIN rail — at 17.5 mm per slot, that's about 122.5 mm of rail width.