What you're sourcing
The ABB 1SBL181001R8401 is an electrical contactor out of the Contactors and Starters family, listed in this catalog under Circuit Breakers, Fuses & Protection. In a control panel this class of part typically sits between the branch protection and the load — switched by a control signal, wired to motor or heater circuits — so the procurement question is fit to the existing coil/suppression scheme and the mounting footprint, both of which have to be confirmed against the device's published data before you commit the BOM line.
Sourcing posture
No production-status entry is recorded for 1SBL181001R8401; verify the listed catalog data against the BOM and RFQ the part before committing the order.