The ABB 1SDA075871R1 is a front-connection terminal kit for copper or aluminum cables, sized for the Tmax XT1 molded-case circuit breaker. It's a 3-pole set, six pieces, accepting 14 to 1/0 AWG conductors. UL489 listed, so it's certified for branch-circuit protection in North American panels.
What the UL489 Rating Means
UL 489 is the standard for molded-case circuit breakers and their accessories used as branch-circuit protective devices. A UL489-listed terminal kit means it's been tested and approved for use with a UL489-listed breaker in a panel — no additional field-evaluation paperwork for the inspector.
The kit is marked ATLAS, which is ABB's internal designation for the Tmax XT family's accessory platform. It's a loose or configurable item — you order the kit and install it on the breaker's front terminals during panel build. The front-connection design keeps the cable entry accessible for torque checks and thermal scanning on a live panel.