SENTRON 3VA1180-5EF32-0AE0 — 80 A MCCB with TM240 Release
The Siemens 3VA1180-5EF32-0AE0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 80 A across three poles. The TM240 thermal-magnetic overcurrent release provides fixed thermal and magnetic trip thresholds — no field adjustment on the thermal element, which simplifies specification but locks the curve to the factory calibration. Breaking capacity reaches 187 kA at 240 V, dropping to 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V, so the part is sized for high-fault industrial distribution where the upstream transformer can deliver those prospective currents.
Thermal Derating and Ambient Constraints
Current rating holds at 80 A from 40 °C through 50 °C ambient. Above that, the TM240 release begins to pull back: 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C. If the panel internal ambient runs above 50 °C — common in sealed enclosures or adjacent to busway — the continuous load must be trimmed accordingly. Operating range spans -25 °C to 70 °C; storage limits are -40 °C to 80 °C, so the breaker can sit as a critical spare in an unheated warehouse without issue.
Auxiliary Switching and Panel Integration
This variant ships with four auxiliary switches (HQ type) built in — no separate add-on module needed. That covers status feedback for a PLC or remote indication on all three poles plus a spare. The front face carries IP40 protection, so it is suited for clean indoor panels; no washdown rating, so keep it behind a gland plate in wet environments. Dimensions are 70 mm deep, 76.2 mm wide, and 130 mm tall — standard 3-pole MCCB footprint for DIN-rail or mounting-plate installation. No undervoltage release, no shunt trip, no ground-fault module on this version; those are separate order-code variants if the application requires them.