80 A MCCB with 75.6 kA interrupting at 240 V — what the ratings mean for the panel
The Siemens 3VA1080-3ED32-0JA0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated 80 A continuous at 40 °C, with a thermal-magnetic TM210 release and an integrated shunt trip (STL) for remote tripping. Its 75.6 kA interrupting capacity at 240 V AC means it can safely clear a fault up to that level without upstream cascading — sized for high-available-fault-current service entrance or distribution panels where the utility transformer sits close. The 800 V rated insulation voltage (Ui) confirms it is suitable for 480 V and 600 V class systems as well, though the interrupting curve drops to 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 500/690 V — a critical check when applying this breaker on a 480 V or 600 V line side.
Thermal derating and panel integration
The 80 A rating holds 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. In a sealed enclosure or high-ambient panel near transformers or drives, that derating matters — the breaker's thermal element responds to internal heat, not just load current. The 70 mm depth and 76.2 mm width fit standard DIN-rail or panel-mount cutouts in the SENTRON family footprint, and the 130 mm height leaves room for auxiliary contacts or shunt trip wiring above the line lugs.
Active production — sourcing posture
The lifecycle stage is marked current, meaning Siemens continues to manufacture this order code. It is not subject to a last-time-buy or phase-out notice. The part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.