Interrupting capacity — what those kA numbers mean for your panel
At 240 V this breaker clears 242 kA — that's a full short-circuit rating for high-fault service-entrance or distribution positions. At 415 V and 440 V it still holds 187 kA, and at 500 V it's 121 kA. At 690 V it drops to 5 kA, so if you're on a 690 V line you need to check the available fault current against that lower ceiling. These are the maximum interrupting ratings per IEC 60947-2; the actual SCCR in your assembly depends on the upstream protection coordination.
Thermal derating — stays at 100 A up to 50 °C
The breaker holds its full 100 A rating from 40 °C through 50 °C. Above that it derates linearly: 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C. If your panel ambient runs hot — say, a sealed enclosure near a furnace line — factor that 85 A floor at 70 °C into your load budget. Operating range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Physical fit — dimensions and mounting
The case measures 181 mm high, 105 mm wide, and 86 mm deep. That 86 mm depth is the body only — add clearance for the UVR coil and auxiliary wiring. It mounts on a DIN rail or direct panel; the 105 mm width is three pole spaces. If you're swapping in from an older SENTRON or 3VA frame, check the depth against your gland plate clearance — 86 mm is shallower than some earlier MCCBs but still needs room for the arc chute exhaust.