MCCB for line protection with shunt trip
The built-in shunt trip (STL) allows remote tripping via a control voltage, which matters when you need to integrate the breaker into an emergency-stop chain or a supervisory shutdown logic.
Breaking capacity is voltage-dependent: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V. For a 400 V class panel, the 52.5 kA figure at 415 V gives you headroom above the typical 25–36 kA SCCR requirement for most industrial distribution boards — provided the upstream transformer and fault current study confirm the available fault current stays under that ceiling. The 690 V rating of 7.5 kA is lower; if your line side runs at 690 V, verify coordination with the upstream protective device.
Above that, derate linearly: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, 91 A at 70 °C. Maximum power loss is 25 W — that heat must be managed inside the panel; adjacent devices should not be packed tighter than the manufacturer's spacing guidelines.
The 76.2 mm (3 in) width is the standard 3-pole MCCB footprint for this class — it fits the same DIN-rail or mounting-plate hole pattern as other SENTRON 3VA frame breakers.