SENTRON 3VM1180-4EE46-0AA2 — 80 A MCCB with 121 kA interrupting capacity
The Siemens SENTRON 3VM1180-4EE46-0AA2 is a 4-pole molded case circuit breaker rated for 80 A continuous current at 40 °C, with a frame size of 160 A. Its headline interrupting ratings are 121 kA at 240 V AC and 76 kA at 415 V AC — that's the short-circuit current it can safely clear at those voltages, which matters for high-fault panels like main distribution boards or industrial switchgear where the available fault current is substantial. The TM220 thermal-magnetic release provides LI (long-time and instantaneous) protection, meaning it handles overload curves and short-circuit trips without electronic adjustment. The switching capacity class S indicates a standard interrupting rating for this frame — not the high-performance class, but the 121 kA at 240 V still covers most commercial and industrial service entrances.
Ratings and what they mean for your panel
Rated insulation voltage (Ui) is 690 V, so the breaker is rated for the insulation coordination of a 480/277 V or 400/230 V system with margin. Maximum operating voltage is 500 V AC 50/60 Hz. The 80 A continuous rating holds from 40 °C through 50 °C — no derating needed at typical panel ambient — and only drops to 74 A at 70 °C. That thermal stability is useful in a crowded enclosure where heat builds up. The 4-pole design handles three-phase plus neutral switching, common in North American and European distribution where the neutral needs disconnection. Front-connected box terminals accept copper or aluminum conductors up to the frame's lug range — no special adapter needed for standard panel wiring.
Lifecycle and sourcing
For volume procurement or BOM commitments, we quote this against an RFQ. Availability and current pricing are confirmed at quote time — no guesswork on lead times or allocation. The part carries the usual Siemens compliance documentation (CE, UL, CSA, IEC 60947-2) though specific cert numbers are on the nameplate.