The LC1FL43M22 is obsolete. Sourcing is through the independent surplus and broker market. Availability is intermittent; each lot must be quoted individually against an RFQ.
The 220V 50Hz coil is a fixed-frequency, fixed-voltage design — it will not operate correctly on 60 Hz or on a different voltage without coil replacement. The 2F2O auxiliary contact block provides two N.O. and two N.C. mirror contacts for status feedback or interlocking, typical for motor starter or reversing contactor circuits. The 3-pole main contacts handle three-phase power switching; the contactor's rated operational current and utilization category (AC-1, AC-3, etc.) are not stated in the available record, so the buyer must verify these from the original datasheet or by measuring the existing unit before specifying a replacement.