It is designed for line protection, so its trip curve and interrupting capacity are tuned for feeder and main breaker duty rather than motor or generator protection. Breaking capacity reaches 187 kA at 240 V and 121 kA at 415 V, tapering to 75.6 kA at 500 V and 7.5 kA at 690 V — the high 240 V figure tells you this unit is built for high-fault North American panels or industrial 480Y/277 V systems where the upstream transformer can deliver serious short-circuit current.
Auxiliary wiring and release configuration
The shunt trip lets you remotely open the breaker from a PLC safety output or E-stop circuit — common in machinery where the MCCB sits upstream of a drive or control transformer and needs to drop out on a stop signal.
Dimensions are 248 mm high × 138 mm wide × 110 mm deep — a standard SENTRON 3VA frame size that fits the same cutout and bus-bar spacing as other 250 A 3-pole units in the series. Maximum power dissipation is 37.5 W at rated current — not negligible in a sealed enclosure; factor that into your thermal budget if the panel also contains drives or transformers.
Temperature range and storage limits
Operates from -25 °C to 70 °C ambient, with storage from -40 °C to 80 °C — the storage range is wider because the breaker is not dissipating heat; the operating limit of 70 °C is what governs real panel placement.