Five Chemi-Con 680µF Solid Capacitors Filter the 12V Output of a 2100W CRPS Server PSU
2026-10-08 · Compiled by Best IT Parts from public industry reporting
A teardown has identified five Nippon Chemi-Con polymer solid aluminum electrolytic capacitors on the 12V main output of a 2100W CRPS server power supply. Each part is rated 680µF/16V, and connected in parallel they form a nominal 3400µF output filter bank. The unit accepts 100-127V and 200-240V AC input as well as 240V DC input, delivers a 12V main output at 175A plus a 12V/3A standby rail, and reaches a maximum output near 2100W. It is built on interleaved PFC, a phase-shifted full bridge and synchronous rectification in the standard CRPS form factor used by data center and high-power server platforms.
After the phase-shifted full bridge and synchronous rectification, the 12V rail still carries high-frequency ripple, so output capacitors are required to smooth the voltage. The five solid capacitors suppress that ripple and reduce voltage variation on the 12V main output. In parallel they also lower the equivalent impedance of the filter bank and share the ripple current between devices, easing the current and temperature stress on any single capacitor.
When the server load changes quickly, the bank can release or absorb charge for a short interval, providing transient energy buffering and limiting voltage excursions on the 12V bus. On a 175A low-voltage, high-current rail this filtering directly affects downstream supply quality. Compared with a single large-capacity device, five 680µF parts deliver the same 3400µF total while spreading filtering and ripple current across multiple capacitors.
For B2B buyers sourcing server PSU spares and board-level components, the design shows how the kilowatt class continues to rely on paralleled polymer solid capacitors on the main low-voltage output rail, a component class worth tracking for replacement-module supply.
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Technical details are reproduced as reported. Verify specifications against the original source before design or procurement decisions.