The 100% N-conductor protection design means the neutral pole is fully rated, not reduced — important for 4-wire systems where harmonic currents or unbalanced loads can push neutral current up to phase levels.
Breaking capacity — the real-world fault current it can interrupt
This MCCB's interrupting rating varies sharply with system voltage, which is the first thing to check against your available fault current. At 240 V AC it handles 121 kA — a very high figure that covers most industrial service-entrance and large subfeed applications. At 415 V AC it's still substantial at 75.6 kA. At 440 V AC it drops to 52.5 kA, and at 500 V or 690 V AC it's 11.9 kA.
Thermal derating — don't assume 100 A at every ambient
At 55 °C it derates to 98 A, at 60 °C to 96 A, at 65 °C to 94 A, and at 70 °C to 91 A.
No end-of-life notice or last-time-buy date.