Delta Electronics DPS-4000LB A REV:04 power supply

The Delta Electronics DPS‑4000LB A REV:04 is a rack‑mount, 48 V/200 A industrial switching power supply designed for telecom and data‑center use. Common failures on this model include overheating of the internal MOSFETs or IGBTs due to inadequate ventilation, failure of the large electrolytic capacitors under high ripple currents, and degradation of the output rectifier diodes in prolonged operation. Check that the unit is properly ventilated, verify input voltage and phase balance, and inspect all capacitors for bulging or leakage; then test the output rails with a calibrated multimeter and examine the thermal imaging if available.[oss-gpt-20b]

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