What this MCCB carries and where it fits
The Siemens 3VA1116-3EF32-0BC0 is a SENTRON molded case circuit breaker rated for 160 A continuous current (Iu) in a 3-pole configuration, designed specifically for line protection — meaning it guards the feeder, not a motor or a downstream load with its own protection. The TM240 thermal-magnetic release gives it a fixed time-current curve, so selectivity studies should start with that curve in hand. Breaking capacity runs 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V — enough to handle high-fault panels without cascading upstream breakers, but the 690 V number tells you this isn't a 690 V workhorse; keep it on the 400 V-class bus where it belongs. Rated insulation voltage is 800 V (Ui), which covers the 690 V system voltage with margin. The operating temperature range runs -25 °C to 70 °C, but the continuous current derating curve starts at 55 °C — 153.6 A at 55 °C, stepping down to 144 A at 70 °C. If the panel ambient sits above 50 °C, factor that derate into the load calculation; the breaker won't trip early, but it'll run warmer than a 40 °C install. Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a standard 3-pole MCCB footprint for DIN-rail or screw-mount panel integration. The front face carries IP40 protection, so it's fine in a clean enclosed panel; keep it out of washdown zones unless it's behind a sealed cabinet door.
Auxiliary and undervoltage release configuration
This unit ships with two auxiliary switches (HQ type) and an integrated undervoltage release (UVR) — the UVR trips the breaker when control voltage drops below the dropout threshold, which is standard for safety circuits that need to drop the main feeder on a loss of control power. The auxiliary switch block is part number 3VA9608-0BB11; if you're swapping a failed UVR or adding a shunt trip later, that's the order code for the auxiliary trip assembly. No communication function, no phase-failure detection, no ground-fault monitoring on this variant. It's a straight line-protection MCCB with a UVR and aux contacts — nothing more, nothing less. If the BOM calls for remote monitoring or GF protection, this isn't the right pick; step up to the 3VA1 with electronic releases.