The Siemens SENTRON 3VA1116-3EF32-0DA0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection, carrying a TM240 thermal-magnetic overcurrent release. It's rated 160 A continuous at 40 °C, with a rated insulation voltage of 800 V. The interrupting ratings climb to 75.6 kA at 240 V and 52.5 kA at 415 V, dropping to 11.9 kA at 690 V — so it handles high-fault-current service-entrance or distribution panels, not just downstream feeder duty.
What the ratings mean for fit
The 160 A rating at 40 °C is the continuous current you can hold without tripping. Derate it as ambient climbs: 158 A at 55 °C, 150 A at 70 °C. That matters if this breaker lands in a non-climate-controlled enclosure next to a transformer or drive — you lose 10 A by the time the panel hits 70 °C. The TM240 release means the thermal pickup is fixed at 240 A; the magnetic instantaneous trip is set at the factory. No trip indicator on the front, so fault isolation means checking downstream first. Breaking capacity is voltage-dependent: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, 11.9 kA at 500 V and 690 V. For a 480 V panel (common in North America), you're looking at roughly the 440 V line — 32 kA SCCR. That's enough for most industrial distribution boards, but verify against your transformer kVA and fault study. The 690 V rating at 11.9 kA covers European 400/690 V IT systems.
Integration notes
The 3VA1116-3EF32-0DA0 includes an undervoltage release (UVR) as the auxiliary release — that's the '3EF32' code. If your safety circuit drops power, the UVR trips the breaker open. No communication function onboard, no ground-fault monitoring. Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. It mounts on a DIN rail or panel-mount base; the 3-pole footprint matches standard SENTRON 3VA cutouts. Power loss at rated current is 40.5 W — account for that in enclosure thermal calculations.