What this 4-pole 160 A MCCB delivers
The Siemens 3VA2216-7HK42-0AA0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) configured for line protection in a 4-pole package. It carries a continuous current rating Iu of 160 A across the full ambient range from 40 °C to 70 °C — no derating needed up to the top of the operating band. The ETU340 electronic trip unit handles the overcurrent release, giving adjustable N-conductor protection (OFF, 50%, or 100% of phase current). Rated insulation voltage Ui is 800 V, and the breaker is rated for 690 V AC operating voltage. 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. That 330 kA figure at 240 V means this MCCB can interrupt very high fault currents at the secondary side of a step-down transformer — a common requirement in industrial distribution panels feeding high-availability loads.
Panel integration and mounting
Dimensions are 86 mm deep, 140 mm wide, 181 mm high. 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.