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Silver rectangular 1U server PSU with modular cable ports and fan grille

Seasonic

Seasonic SS-500L1U 500W server power supply

SKU CH-WCBW-N7BHW MPN SS-500L1U

Delivers 500 W EPS12V power with Active PFC and modular cables for single-server builds

  • TypeEPS12V
  • Single/RedundantSingle
  • Maximum Power500W
  • Output+3.3V@20A, +5V@20A, +12V Combined@40A, [email protected] , [
  • Input Frequency Range47 - 63 Hz
  • MTBF>100,000 Hours
  • 500W output powers demanding server workloads
  • 87% efficiency reduces energy waste and heat
  • 100,000 hour MTBF indicates long service life
  • Active PFC 99% typical improves power quality
  • Compact 1U form factor fits dense rack deployments

Server power supply for 1U rack builds

The Seasonic SS-500L1U is a new 500W EPS12V unit built for single 1U server installations. It delivers +12V at 40A with +3.3V and +5V each at 20A for balanced rail loading. Active PFC and a DC-to-DC converter design keep efficiency above 87 percent at typical loads.

Practical limits of the EPS12V standard

The form factor measures 235 by 100 by 40mm and fits a single 1U slot with an input range of 47 to 63 Hz. Modular cables are customised for the chassis rather than following a universal pinout, so cable routing must match the server layout. MTBF exceeds 100000 hours with protections for short circuit, over voltage and over power.

Upgrade from lower-efficiency or failed units

Replacing an older supply that lacks 80PLUS Gold certification cuts waste heat and improves rail stability under sustained loads. The jump is worth it when the existing unit shows ripple above one percent or when fan noise becomes intrusive in a quiet rack. Builders needing redundant power or higher wattage should look elsewhere.

Punti di forza

  • 500W output powers demanding server workloads
  • 87% efficiency reduces energy waste and heat
  • 100,000 hour MTBF indicates long service life
  • Active PFC 99% typical improves power quality
  • Compact 1U form factor fits dense rack deployments

Caratteristiche tecniche

BrandSeaSonic
ModelSS-500L1U
TypeEPS12V
Single/RedundantSingle
Maximum Power500W
Output+3.3V@20A, +5V@20A, +12V Combined@40A, [email protected] , [email protected]
Input Frequency Range47 - 63 Hz
MTBF>100,000 Hours
Efficiency> 87%
ProtectionShort circuit protection on all outputs
Over voltage protection
Over power protection
FeaturesSwitch Mode Power Supply, Intel EPS 12V, Active PFC
Connectors: Customized modular cables
Line regulation: +/-1% typical
Load regulation: +/-5% typical
Cross regulation: +/-5% typical
Ripple / noise: 1%
Power Factor Correction: Active PFC 99% typical
DC to DC converter design
High efficiency and reliability
Low THD
Low ripple & noise
Super low noise fan control
100% hi-pot test
100% burn in, high temperature cycled on/off.
DimensionsL235 x W100 x H40mm (9.3" x 3.9" x 1.6")
Peso di spedizione1.96 kg
Dimensioni del pacco257 × 175 × 81 mm

Domande su questo articolo

Is this the only capacity available for the SS-500L1U?

The SS-500L1U is offered as a single 500W model with no alternative wattage versions listed.

What does the 500W rating mean for my server build?

It delivers up to 500W total, with the +12V rail supplying a combined 40A for CPU and GPU power.

Does the EPS12V interface limit the 500W output in any way?

The EPS12V design supports the full 500W across all rails, with Active PFC correcting the power factor to 99% typical.

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