It carries a 50 A rated current at 40 °C and delivers a 52.5 kA breaking capacity at 240 V AC — the figure that governs its fault-interruption capability at common low-voltage supply points.
The interrupting rating drops as system voltage rises: 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at both 500 V and 690 V (–). The 52.5 kA at 240 V covers high-fault scenarios on split-phase or 240 V line-to-line feeds.
Rated current holds at 50 A from 40 °C through 50 °C, then derates to 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C (–). Maximum power loss is 17.1 W — negligible for most panels but worth checking if multiple breakers sit in a sealed, uncooled compartment.
The UVR drops the breaker on loss of control voltage — standard for safety circuits where a downstream contactor or safety relay must not re-energize until voltage is restored. The trip alarm switch signals the breaker's thermal-magnetic trip separately from manual open, useful for remote fault annunciation.
Physical Fit and Environmental Range
The 101.6 mm width is a standard 4-inch footprint for a 4-pole MCCB — it occupies one full modular position in a SENTRON distribution panel or any DIN-rail adapter. The operating range covers most indoor industrial enclosures; the storage range accommodates unheated warehouses.