What the ratings mean for fit
The 3VA1180-6EF36-0DA0 is a Siemens SENTRON molded case circuit breaker (MCCB) rated for 80 A continuous current (Iu) at 40 °C, with a TM240 thermal-magnetic release. That 80 A holds flat up to 50 °C — at 55 °C it derates to 76.8 A, and at 70 °C it still carries 72 A, so the thermal curve is generous for a warm panel. The interrupting ratings are the headline: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 690 V. That 220 kA at 240 V means it can clear a fault at the full available short-circuit current of a large industrial service entrance without upstream coordination — the breaker itself handles the arc. The 690 V rating at 17 kA is the one to watch if you are on a 600 V class system; the gap from 440 V to 690 V is steep. Rated insulation voltage is 800 V (Ui), so it is rated for 480/277 V and 600 V delta systems without a voltage derating concern. The 3-pole construction with an undervoltage release (UVR) fitted — order code 3VA9608-0BB25 for the release itself — means this breaker drops out on loss of control voltage, which is standard for emergency-stop or safety-related branch circuits where you want the load disconnected if the control supply fails. No auxiliary contacts, no communication module, no ground-fault monitoring on this variant — it is a straight line-protection MCCB with undervoltage trip.
Panel fit and mounting
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. That 76.2 mm width is three 25.4 mm pole spaces — standard for a 3-pole MCCB on a DIN rail or panel-mount footprint. The 70 mm depth means it clears a 100 mm deep enclosure with room for wiring gutters. IP40 on the front — no gasket seal, so not for washdown zones, but fine for a dry indoor panel. The 15 000-cycle mechanical endurance is the latching count; for a main breaker that cycles a few times a year that is effectively lifetime, but if this is used as a disconnect that sees daily operation, factor that into maintenance planning.