What this 4-pole 160 A MCCB delivers
The ETU340 electronic trip unit handles the overcurrent release, giving adjustable N-conductor protection (OFF, 50%, or 100% of phase current). Short-circuit breaking capacity reaches 330 kA at 240 V AC, 242 kA at 415/440 V, 187 kA at 500 V, and 4.5 kA at 690 V.
The 140 mm width for a 4-pole frame is standard for SENTRON 3VA2 breakers — it matches the cutout and busbar spacing used across the series. Front protection is IP40, sufficient for enclosed panel mounting where the breaker face is behind a door or cover. Maximum power loss is 19.7 W. In a densely packed panel, that heat needs to be considered in the thermal budget — especially if multiple breakers are ganged without spacing.