What this SIRIUS breaker does on the line
Breaking capacity — where the SCCR matters
At 240 V the 3RV1011-1KA10-ZW98 interrupts 100 kA, which covers most North American panel SCCR targets without an upstream fuse. At 400 V it holds 13 kA, enough for European industrial grids with typical transformer impedances. The gL/gG fuse coordination limits are 80 A at 240 V and 400 V, dropping to 50 A at 500 V and 690 V — that tells you the maximum backup fuse that still lets the breaker clear a fault within its let-through curve.
At 45 mm wide and 75 mm deep, it occupies one standard modular slot — no extra side clearance needed beyond the 9 mm at the side. Terminals accept 2x 0.5 to 2.5 mm² solid or stranded, and the main contact screws are M3.