What this device is
The ABB 1SDA067603R0001 is a Sace XT2H 160 moulded-case circuit breaker, catalogue code XT2H 160 TMA 125-1250 3p F F — a three-pole, fixed-front, thermal-magnetic trip unit set in the 160 A frame, sized to carry and break 125 A on the XT2 platform.
Reading the frame and trip designation
XT2H places the breaker in ABB's 160 A moulded-case line with an H (high) interrupting tier, so coordination with downstream breakers and the busbar SCCR has to be worked to that class — not to the smaller XT1 nor to the XT4/Emax frames above it. The TMA 125-1250 suffix names the trip: thermal-magnetic, adjustable, long-time pick-up at 125 A and instantaneous magnetic threshold in the listed 1250 A range. That is what sets cable and transformer protection on the panel schedule, not the 160 A frame limit.