The Siemens SENTRON 3VA1080-4ED36-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated for 80 A continuous current (Iu) at 40 °C, with the TM210 thermal-magnetic release. It holds the interrupting rating at 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that matter for fault-current coordination downstream of a transformer or generator bus. The line protection version means it is set up for cable and busbar protection, not motor or generator protection, so the trip curve is fixed for that duty.
Current rating and thermal derating
The 80 A rating holds flat from 40 °C to 50 °C. At 55 °C it derates to 76.8 A, at 60 °C to 75.2 A, at 65 °C to 73.6 A, and at 70 °C to 72 A. If the panel ambient runs above 50 °C, the continuous load must be reduced per these values — the breaker does not trip early; the thermal element is calibrated to these conditions.
Interrupting capacity across voltages
At 240 V the breaker clears 121 kA; at 415 V it clears 75.6 kA; at 440 V it clears 52.5 kA; at 690 V it clears 11.9 kA. The interrupting rating drops as system voltage rises — this is typical for an MCCB with a fixed arc chamber. For a 480 V distribution panel the relevant figure is the 440 V rating (52.5 kA) since the next standard test voltage is 480 V; the 690 V rating (11.9 kA) applies only if the system neutral is solidly grounded and the line-to-line voltage is above 480 V.
Release and accessories
The TM210 release is a thermal-magnetic type — thermal for overload, magnetic for short-circuit. No undervoltage release is fitted, no auxiliary contacts, no ground-fault monitoring, no communication function, no phase-failure detection. A shunt trip (STL) is present as the auxiliary release design; the integrated auxiliary trip is order code 3VA9688-0BL30. The trip indicator is not present, so a remote indication of trip state requires an external auxiliary contact block to be added.
Physical integration and environment
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep. It mounts on a DIN rail or directly to a panel backplate via the screw terminals. The front face carries an IP40 protection class — suitable for a clean indoor panel, not for washdown or outdoor exposure. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The reference code per DIN EN 81346-2 is Q (circuit protection).