That makes it a straight replacement for older fixed-trip MCCBs in commercial or light industrial switchboards where you don't need adjustable long-time or short-time pickup.
This breaker delivers 121 kA interrupting at 240 V AC, dropping to 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 500 V and 690 V. At 415 V — common for European industrial feeds — 75.6 kA gives you headroom above a typical 50 kA utility fault level, so you can use it as a main breaker without worrying about cascading failure upstream.
The 100 A rating holds flat from 40 °C to 50 °C ambient, then derates to 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C.