Siemens SENTRON 5SM3346-6BA is a 4-pole Type A RCCB rated at 63 A, 30 mA trip, 400 V AC. Instantaneous design clears ground faults without intentional delay.
Mounts on DIN rail (REG) and occupies 4 width units. Installation depth is 70 mm.
Environmental and safety ratings
The IP20 rating applies only when the distribution board is installed with conductors connected; the housing itself is finger and back-of-hand safe (IP20B), so accidental contact with live parts behind the panel cover is prevented. Silicone-free construction is noted for environments where silicone outgassing can contaminate contacts or optics.