Four poles cover three-phase-plus-neutral or dual-fed configurations. That continuous rating holds flat through 50 °C, then derates to 24 A at 55 °C and 23 A at 70 °C (–). Interrupting capacity is the headline number here: 76 kA at 240 V AC, 53 kA at 415 V, 32 kA at 440 V, and 12 kA at 500 V. At 415 V, the 53 kA still covers most industrial motor-control center (MCC) applications. The 12 kA at 500 V is the floor; verify against your utility's worst-case fault study.
Footprint and panel integration
That 101.6 mm (4-inch) width for a 4-pole MCCB is compact — fits standard 4-inch gutter space in a 600 mm wide enclosure. Depth at 70 mm leaves room for rear bus connections without crowding the backplane. Verify the mounting base accepts the standard SENTRON plug-in or fixed lugs before panel layout.
Thermal performance across temperature
The breaker carries a maximum power loss of 9 W at rated load. The derating curve above 50 °C is gradual — only 1 A drop per 5 °C step — so it's usable in moderately warm enclosures without oversizing. No trip indicator means you won't get a visual flag on the handle; rely on the position indicator only.