What this MCCB delivers — and what the ratings mean for your panel
The 3VA1080-4ED42-0CA0: The interrupting ratings tell the real story for fault duty: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. At 415 V — the common low-voltage distribution level in many markets — that 75.6 kA breaking capacity handles high-fault scenarios like transformer secondaries or large motor banks without needing a current-limiting upstream device. This is a 4-pole unit with a TM210 thermal-magnetic overcurrent release and an integrated undervoltage release (UVR) as the auxiliary release design. The UVR trips the breaker when control voltage drops below a threshold — standard for machinery where loss of control power must open the main disconnect. No auxiliary contacts, no ground-fault monitoring, no communication function on this variant; it is a straight line-protection MCCB with undervoltage supervision built in.
Panel fit and mounting — what the dimensions tell the wireman
The 3VA1080-4ED42-0CA0 measures 130 mm high by 101.6 mm wide by 70 mm deep. That 101.6 mm width (4-inch footprint) is standard for a 4-pole MCCB in the SENTRON 3VA platform — it occupies the same horizontal slot as other 4-pole units in the family, so a panel laid out for a 3VA1112-5EF32-0CA0 will accept this breaker without re-drilling the mounting plate or re-spacing the busbars. The 70 mm depth leaves clearance behind a standard 200 mm deep enclosure backplate for wiring and lug access. Front protection is IP40, meaning the breaker face is protected against tools and small wires (1 mm+ objects) but not sealed against moisture. Suitable for indoor panel mounting in a clean environment; if the panel sees washdown or dust, the enclosure IP rating carries the burden, not the breaker face.