160 A MCCB for line protection — what the ratings mean for fit
The SENTRON 3VA1116-5EF42-0CA0 is a 4-pole molded case circuit breaker rated for 160 A continuous current, with a TM240 thermal-magnetic overcurrent release. That 160 A holds flat from 40 °C to 50 °C, then derates to 144 A at 70 °C — so if this lands in a hot panel or outdoor enclosure, the usable ampacity drops 10 % at the high end. The interrupting ratings are the headline: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. Those numbers mean it can clear a fault upstream of a 2 MVA transformer at 240 V without the arc re-striking, which is the kind of SCCR headroom a site electrical engineer needs for a service-entrance or main-feeder position. The 800 V rated insulation voltage (Ui) confirms it's built for 690 V line-to-line systems with margin.
Panel integration and physical fit
At 101.6 mm wide, 130 mm tall, and 70 mm deep, this MCCB fits a standard 4-pole mounting footprint. The IP40 front protection means it's fine for a clean indoor panel but not for washdown zones. It ships with an undervoltage release (UVR) as the auxiliary release design — the integrated auxiliary trip order code is 3VA9608-0BB24. No auxiliary contacts are included on the base unit, so if the BOM calls for status feedback to a PLC, add those separately. The TM240 release is fixed-thermal, not electronic, so there's no phase-failure detection or communication function on this variant.
What this MCCB is used for
As a line-protection MCCB, it sits between the transformer secondary and the distribution bus, or as a main breaker in a panel feeding motor control centers and lighting sub-panels. The 4-pole configuration handles three-phase plus neutral, common in North American 120/208 V and 277/480 V systems as well as international 400/690 V networks. The undervoltage release lets a safety circuit or emergency-stop chain trip the breaker open when control voltage drops — a standard requirement in machine safety circuits per IEC 60204-1.