125 A MCCB with high interrupting capacity for line protection
Interrupting capacity hits 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, and still 17 kA at 690 V — so it clears high-fault scenarios downstream of large transformers or in industrial mains without cascading failure upstream. That kind of SCCR headroom means you can use it as a main breaker in a panel feeding multiple subfeeds, not just a branch device. Thermal derating is published from 40 °C through 70 °C: it holds 125 A up to 50 °C, then drops to 120 A at 55 °C, 117.5 A at 60 °C, 115 A at 65 °C, and 112.5 A at 70 °C. An undervoltage release (UVR) is integrated — order code 3VA9608-0BB25 for the auxiliary trip — so the breaker drops out on loss of control voltage, which is common in safety circuits or emergency-stop chains that need a shunt trip on undervoltage. No auxiliary contact module is fitted as standard.
Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall — a standard 3-pole MCCB footprint that drops into most SENTRON distribution panels and switchboard cubicles without re-drilling.