What this RCCB is and where it goes
The Type B characteristic means it detects smooth DC fault currents up to 1 kHz, not just AC and pulsating DC — so it's the right choice for circuits with variable-speed drives, UPS systems, or PV inverters that can dump a flat DC residual onto the line. The short-time delayed design (SIGRES function) gives it selectivity against nuisance tripping from transient surge currents; it holds through the inrush of a motor starter or a capacitor bank without dropping the circuit. IP20 with connected conductors; install it inside a distribution board or enclosure.
That's the load current it carries in normal operation — sized for a submain or a large final circuit feeding multiple loads. The short-time delayed variant (0.8 kA rated conditional short-circuit current per EN 60898 and IEC 61008-1) gives you selectivity with downstream 30 mA RCCBs — the downstream unit trips first on a fault, keeping the rest of the board live.
DIN rail snap-on, any mounting position. Depth 77 mm, width 72 mm (4 MW), height 90 mm — installation depth 70 mm. Supply can enter from top or bottom; the SIGRES function stays active even with supply from below in the switched-off state. Silicon-free construction.