Interrupting capacity is the headline number here: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 500 V and 690 V. The 3VA series uses a rotary handle mechanism common across the SENTRON family, so panel cutouts and bus-bar layouts transfer between frame sizes.
Footprint: 76.2 mm wide (3 inches), 130 mm tall (5.12 inches), 70 mm deep (2.76 inches). The 3-pole width matches standard 3-inch MCCB slots in most distribution panelboards. No auxiliary or communication modules are factory-fitted on this variant; the design carries provision for up to 4 auxiliary switches HQ (high-qualified) if you add them later. If you need any of those, you are looking at a different suffix or an add-on accessory. The basic switch supplied is 3VA11124EF360AA0 — that is the internal mechanism this order code ships with.
Thermal and environmental limits
The 125 A rating holds at 40 °C, 45 °C, and 50 °C without derating; at 55 °C it drops to 122 A, at 60 °C to 120 A, at 65 °C to 117 A, and at 70 °C to 114 A.