80 A line protection with 121 kA interrupting capacity
The Siemens 3VA1180-4GF46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 80 A continuous current at 40 °C, configured as a 4-pole line-protection device with a TM240 thermal-magnetic release. Its interrupting rating reaches 121 kA at 240 V and 75.6 kA at 415 V, meaning it can safely clear high-fault currents on industrial distribution without cascading upstream — critical for main or feeder breaker positions where available fault current is high.
Thermal derating and panel fit
The breaker holds 80 A continuously 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 — a gentle slope that keeps the part usable in warm enclosures without oversizing. Panel footprint is 101.6 mm wide by 130 mm tall by 70 mm deep, which fits standard SENTRON 4-pole MCCB mounting on DIN rail or rear-panel studs. Front protection is IP40, adequate for enclosed switchboards but not for washdown environments.
Key ratings at a glance
Rated insulation voltage Ui is 800 V; maximum DC operational voltage is 600 V. The TM240 release provides fixed thermal and magnetic trip settings for line protection. Maximum power loss is 19.2 W, which should be factored into enclosure thermal calculations. Storage temperature range spans -40 °C to 80 °C; operating range is -25 °C to 70 °C. The N-conductor is protected at 100 % rating, meaning the neutral pole is fully rated — not reduced.