Reading the nameplate before you commit the BOM line
The 1FK7042-2AF2.-.... is a SIMOTICS S 1FK7-CT synchronous servo motor — standstill torque 3 Nm at 100 K, rated speed 3000 rpm, 0.82 kW mechanical output on a 300 V DC link, naturally cooled (no fan stack on the back cap) (cites:).
Why naturally cooled matters on a 0.82 kW axis
Naturally cooled means the motor dissipates its losses through the housing and the flange into the machine frame — there is no integrated fan to push air across the windings, so the S1 continuous rating depends on a clean thermal path from the motor face to the mount (cites:). For panel builders and integrators this changes the cabinet layout: no fan cable, no intake clearance, but the surrounding machine structure has to act as the heatsink or the 3 Nm M0 figure pulls back under duty cycle (cites:).
Sourcing posture when the line is already down
On an eol_hot servo, the stock that exists is surplus or service-recovery material — independent distributors quote against an RFQ and the lot size, condition, and lead time are confirmed at quote time (cites:). No official successor is listed for this code, so a board-spin replacement is the only clean second-source path; sourcing it as a like-for-like spare means accepting whatever verified inventory the independent channel holds (cites:,).