What this MCCB does and where it fits
Rated 50 A continuous across a 40 °C to 50 °C ambient range, it holds full current without derating up to 50 °C; above that it steps down to 49 A at 55 °C and 45 A at 70 °C. Interrupting capacity is the headline here: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. The 17 kA at 690 V still covers most motor branch circuits on 690 V systems.
Width at 101.6 mm (4 inches) is standard for a 4-pole MCCB — it occupies one 4-inch slot in a multi-breaker panelboard or a DIN-rail adapter plate. The trip indicator and voltage trigger are built in, so no add-on modules are needed for local status.