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Rectangular silver power module with rear vent and front IEC socket

HPE

HPE JG900A A58x0AF Back to Front Airflow 300W AC Power Supply

SKU CH-9YNE-EDFVX

300 W AC power module with back-to-front airflow for selected HP stackable switches, accepting 120 V or 230 V input

  • Back-to-front airflow cools ports efficiently
  • 300 W output powers selected HP stackable switches
  • Dual 120 V / 230 V AC input suits global deployments
  • Compact 4.6" height fits dense rack environments
  • 1" width aligns with standard switch chassis

Purpose and fit

This 300W AC power module is built for selected HP stackable switches that require back-to-front airflow. It suits network administrators replacing a failed unit or adding redundancy to an existing chassis. Buyers who need a front-to-back airflow direction or a different wattage rating cannot use this module.

Thermals noise and power draw

The unit accepts 120V AC and 230V AC input, allowing deployment in standard office or data-centre circuits. Its back-to-front airflow moves heat from the power side toward the port side, matching the cooling path of compatible switches. Physical dimensions are 4.6" high, 17.1" wide and 8.5" deep.

Sustained load behaviour

Rated at 300W continuous output, the supply is designed to deliver full power throughout extended operation without derating. The fixed airflow direction ensures consistent thermal performance as long as the host switch maintains its own fan speed. No alternative airflow or higher-capacity option is provided by this part number.

Highlights

  • Back-to-front airflow cools ports efficiently
  • 300 W output powers selected HP stackable switches
  • Dual 120 V / 230 V AC input suits global deployments
  • Compact 4.6" height fits dense rack environments
  • 1" width aligns with standard switch chassis

Specifications

BrandHPE

Questions about this item

How do I install the JG900A power supply into an A58x0AF switch and what step is often missed?

Slide the unit into the power-supply bay until the latch clicks; the step often missed is confirming the back-to-front airflow arrow matches the chassis direction before securing the captive screws.

What maintenance or replacement will the 300W AC module need over time?

The internal fan is the only moving part; plan to clean dust from the inlet vents periodically and replace the entire module if fan noise increases or the switch reports a power-supply fault.

At what input voltage does the 300W supply hit its limit first during sustained load?

At 120 V AC the input current draw is highest, so the branch-circuit breaker or connector rating typically becomes the limiting factor before the 300 W output capacity is reached.

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