The Saft Nife SMF3000‑50‑55 is a high‑current AC‑DC rectifier module commonly used in industrial power supply units for drives, controls and monitoring equipment. Typical failure modes include overheating of the bridge diodes or MOSFETs, degradation of input capacitors, and failure of the internal protection circuitry (over‑voltage/over‑temperature shutdown). Initial troubleshooting should verify that the AC input voltage is within spec and that the output DC rail remains stable; check for visible signs of component burn‑out or capacitor bulging. Next, measure the rectifier’s output current capability with a load test, inspect the PCB for solder bridges or cracked traces, and review any error logs from the host controller for indications of power supply faults.[oss-gpt-20b]