It carries a 10 kA short-circuit current rating (Icn) and is designed for instantaneous tripping — no intentional delay, so it clears fast on earth faults.
Type A detection means this RCCB handles both sinusoidal AC residual currents and pulsating DC — the kind rectifier-fed loads (VFDs, switching power supplies, LED drivers) can produce. If your downstream equipment includes single-phase rectification, Type A is the correct choice; a standard AC-type RCCB may not trip on pulsating DC faults. Above that, the allowable current derates stepwise: 38.1 A at 45 °C, 35.59 A at 50 °C, 32.29 A at 55 °C, 28.19 A at 60 °C, 23.3 A at 65 °C, and 17.62 A at 70 °C. That's the standard residential and light-commercial SCCR for a final subcircuit; if your available fault current exceeds 10 kA at the panel, you'll need a current-limiting MCB upstream or a higher-rated RCCB variant.
Mounting position is any orientation — no restriction on upright or sideways. Not for wet or washdown environments.