The part
The ABB 1SAM150000R1012 sits in the contactor & starter accessories family — Circuit Breakers, Fuses & Protection › Contactors and Starters › Contactor & Starter Accessories & Parts — and is rated for three-phase 7.5 kW duty, which is the figure that decides whether it pairs with the motor on the BOM line.
Class and fit
Accessories in this category mate with ABB's three-phase motor-side contactor and starter assemblies, so the right comparison is against the matching 1SAM mounting kit or busbar link, not a generic breaker or relay. Confirm the frame and termination type against the host contactor before specifying into the BOM; the listing is short on functional detail, so the panel-side mate drives the decision.
Sourcing posture
No official L-series successor appears in the record, so the sourcing path stays with the 1SAM150000R1012 line itself through the surplus and independent channels; an RFQ against this exact order code is how the BOM line is committed.