Siemens 3VA1180-5EE32-0AA0 – 80 A MCCB for Line Protection
The Siemens SENTRON 3VA1180-5EE32-0AA0 is a 3-pole molded case circuit breaker rated 80 A at 40 °C with a TM220 thermal-magnetic overcurrent release, designed for line protection in distribution panels. Its interrupting capacity reaches 187 kA at 240 V AC, 121 kA at 415 V, and 75.6 kA at 440 V — figures that place it in the high-fault category for industrial switchgear, suitable for installations with high available fault current. The TM220 release combines a thermal element for overload protection and a magnetic element for short-circuit protection, with no undervoltage release or ground-fault monitoring fitted as standard.
Integration & Mounting
The 3VA1180-5EE32-0AA0 measures 70 mm deep, 76.2 mm wide, and 130 mm high, fitting standard panel cutouts for 3-pole MCCBs in the 80 A frame class. IP40 protection on the front allows installation in enclosed distribution boards where no water ingress is expected; the open back requires the panel enclosure to provide the overall IP rating. Maximum power loss at rated current is 19.2 W — factor this into thermal calculations for enclosed panels, especially when multiple breakers are ganged.
Ratings & Derating
Current rating holds at 80 A from 40 °C through 50 °C, then derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C — the thermal curve governs actual continuous capacity in warm cabinets. Rated insulation voltage is 800 V, and operating temperature range spans -25 °C to +70 °C, with storage from -40 °C to +80 °C.