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Rectangular matte-black ATX power supply, fully modular, no fan visible, 140 mm deep

Seasonic

Seasonic SSR-500PL 500 W fanless power supply

SKU CH-JGC1-X458Q MPN SSR-500PL

A fanless 500 W ATX power supply with 80 Plus Platinum efficiency, full modular cabling, a single +12 V rail rated at 41 A and a compact 140 mm depth for silent builds

  • TypeATX12V
  • Maximum Power500 W
  • FansFanless
  • Main Connector20+4Pin
  • +12V RailsSingle
  • PCI-Express Connector2 x 6+2-Pin

Options ATX 80+ Platinum (500W) Black Fanless

  • Silent operation with a true fanless design
  • 80 PLUS Platinum efficiency reduces wasted energy
  • Fully modular cables cut clutter and improve airflow
  • Load regulation under .5 % for stable power
  • 500 W from a compact 140 mm unit

Fanless 500 W ATX power supply

The Seasonic SSR-500PL is a fully modular ATX12V unit that delivers 500 W without any moving parts. Its fanless design eliminates mechanical noise entirely, making it suited for silent workstations, recording spaces or any build where acoustic output must be zero.

Upgrading from a fan-cooled PSU

Replacing a conventional supply removes the single largest source of rotating noise in a chassis. The jump is worthwhile when the system load stays within the 500 W limit and the case airflow can dissipate the unit's heat passively, because there is no internal fan to move air through the PSU itself.

Build integration

At 140 mm long the unit fits standard ATX layouts and the full modular cabling lets you connect only the 24-pin, two 8-pin CPU, two 6+2-pin PCIe and eight SATA leads required. The single +12 V rail rated at 41 A simplifies GPU power distribution, while the DC-to-DC topology and sub-0.5 % load regulation keep voltages stable under varying demand.

Highlights

  • Silent operation with a true fanless design
  • 80 PLUS Platinum efficiency reduces wasted energy
  • Fully modular cables cut clutter and improve airflow
  • Load regulation under .5 % for stable power
  • 500 W from a compact 140 mm unit

Specifications

BrandSeaSonic
SeriesPRIME Fanless PX-500
ModelSSR-500PL
TypeATX12V
Maximum Power500 W
FansFanless
Main Connector20+4Pin
+12V RailsSingle
PCI-Express Connector2 x 6+2-Pin
SATA Power Connector8
Max PSU Length140 mm
ModularFull Modular
Energy-Efficient80 PLUS PLATINUM Certified
Over Voltage ProtectionYes
Input Voltage100 - 240 V
Input Frequency Range50/60 Hz
Input Current7 - 4 A
Output+3.3V@20A, +5V@20A, +12V@41A, [email protected] , +5VSB@3A
MTBF150,000 Hours
ApprovalscTUVus, TUV, CB, CCC, BSMI, EAC, CE
Energy Star, RoHS, WEEE, ErP Lot 6, REACH
Connectors1 x MB (24/20 pins)
2 x CPU (8/4 pins)
2 x PCIe (8/6 pins)
8 x SATA
3 x Molex
1 x Molex to SATA 3.3 Adapter
FeaturesSuper High Efficiency, 80 PLUS Platinum Certified
Fully Modular Cabling Design
Seasonic Fanless Design
Micro Tolerance Load Regulation (MTLR) [0.5 %]
DC to DC Converter Design
Dimensions3.39" x 5.91" x 5.51"
Weight3.32 lbs.
Shipping weight2.67 kg
Package size274 × 193 × 114 mm

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Questions about this item

What case clearance does the 140 mm long PSU need?

The unit is 140 mm deep so the case must provide at least that much clear length from the mounting face; also allow space above the PSU for passive airflow since there is no fan.

Which cables must be connected first during a full-modular build?

Attach the 20+4 pin motherboard cable and the two 8/4 pin CPU cables to the PSU before routing them; the 6+2 pin PCIe and SATA cables can follow once the main power leads are seated.

When should the internal electrolytic capacitors be expected to need replacement?

With an MTBF of 150000 hours the capacitors are rated for many years of continuous use; plan a check after roughly a decade of 24/7 operation.

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