The ABB 1SDA074708R1 is a SACE Tmax XT1 molded case circuit breaker, 3-pole, rated 125 A continuous (Iu = In = 125 A) with a TMF thermal-magnetic release. Rated operational voltage is 600Y/347 V AC. The bolt-on front terminals accept busbar from 45.5 to 80 mm², and the tightening torque is 6 N·m with an M6 screwdriver.
The 100 kA interrupting rating at 240 V AC (per UL489) means this breaker can safely clear a fault up to 100,000 A without rupturing — critical for high-capacity transformer secondaries or busway taps. The same breaker carries a lower SCCR at higher voltages; verify the specific interrupting rating for your system voltage from the UL/CSA tables. Thermal-magnetic (TMF) release combines a thermal bi-metal for overload protection and a magnetic coil for short-circuit trip. The 125 A setting range is fixed — this is not an adjustable-trip breaker. Opening time with the SOR (shunt opening release) is 30 ms, fast enough to limit let-through energy on a bolted fault. Power loss is 10.7 W per pole at rated load, which matters for enclosure heat rise — in a multi-breaker panel, sum the losses and check the derating curve if ambient exceeds 40 °C.
RoHS compliant per EU Directive 2011/65/EU and Amendment 2015/863. The environmental information document is 9AKK108467A6707. Wiring diagram 1SDM000068R0001 and dimensional drawing 1SDH001295R0008 are available for panel layout and assembly. WEEE category 5 (small equipment, external dimension ≤50 cm). The product is also part of ABB EcoSolutions, with extended product lifetime and modularity — meaning spare parts and accessories are planned for long-term availability.