What the listing tells you
The 1SBL141001R8401: As an A-series style contactor, it is the kind of part that drops onto a DIN rail, takes a coil voltage on the control side, and hands switched power to the load on the main poles — the exact device a panel-builder reaches for when a motor starter, lighting bank or heater string needs remote switching.
Sourcing posture
For a line-down spare, send the BOM line in and request a lead-time check; single-unit pricing on this part varies with quantity, so a panel run of fifty will not match a one-off quote.