Rubycon MXK 450V Electrolytics Deliver 1,610μF on the PFC Bus of Delta's 3000W SiC Server Power Supply
2026-09-19 · Compiled by Best IT Parts from public industry reporting
Teardown analysis of the Delta DPS-3000AB-22A — a 100-127V/200-240V AC input, long-form-factor server supply rated 3000W (12V/250A main plus 5V/3A standby at 210-240V AC input) measuring roughly 450 x 54.9 x 41mm and 1,642g — shows the PFC high-voltage bus filtered by two Rubycon MXK-series aluminium electrolytic capacitors rated 450V/870μF and 450V/740μF, for 1,610μF total. Placed between the PFC boost stage and the full-bridge LLC power stage, they smooth the PFC output, absorb high-frequency ripple and store bus energy for transient load steps, with ripple current deliberately split across two devices. MLCCs sit in parallel to handle the high-frequency component. Topology is PFC + full-bridge LLC + synchronous rectification with output filtering. A useful capacitor-selection benchmark for kilowatt-class server and adapter power designs.
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Technical details are reproduced as reported. Verify specifications against the original source before design or procurement decisions.