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Two black sleeved cables with USB plugs and small three-or-four-pin fan connectors

Vszerda

Vszerda USB to 3-Pin / 4-Pin PWM Fan Power Adapter Cable 2 Pack

SKU CH-37CF-RFAHT

Powers 3-pin or 4-pin PWM case fans from a 5 V USB port, includes two 11.8-inch sleeved 22AWG cables

  • Powers 3-pin or 4-pin fans from any 5 V USB port
  • Two sleeved 11.8 inch cables included for flexible routing
  • 22 AWG pure-copper conductors handle continuous 80 °C operation
  • Slim .12 inch diameter fits tight case cut-outs
  • PWM signal passed through so speed control remains active

Two-cable pack for USB-powered fans

This Vszerda adapter set includes two cables that convert a standard 5 V USB port into a 3-pin or 4-pin PWM fan header. Each cable measures 11.8 inches and uses 22 AWG pure-copper conductors inside a 0.12-inch PVC sleeve. The pack suits builders who want to run case fans from a USB power bank, charger or motherboard header without a dedicated fan controller.

Start-voltage limit decides compatibility

The adapter only works with fans that have a start voltage at or below 5 V; fans requiring a higher start voltage will not spin at all. Connector ends are a USB-A plug on one side and a combined 3-pin/4-pin fan socket on the other, so both 3-pin voltage-controlled and 4-pin PWM fans can be attached. No additional drivers or software are needed for the connection.

Powers low-start-voltage fans at reduced speed

Connected fans will run at roughly 60 % lower speed than on a 12 V header, making the cables suitable for quiet, low-airflow cooling or supplemental airflow in tight spaces. The 80 °C temperature rating and pure-copper conductors handle the modest current draw of compatible fans without overheating. Builders needing full-speed 12 V operation or fans with start voltages above 5 V must use a standard motherboard or controller header instead.

Highlights

  • Powers 3-pin or 4-pin fans from any 5 V USB port
  • Two sleeved 11.8 inch cables included for flexible routing
  • 22 AWG pure-copper conductors handle continuous 80 °C operation
  • Slim .12 inch diameter fits tight case cut-outs
  • PWM signal passed through so speed control remains active

Specifications

No published specifications for this item yet.

Questions about this item

How much slower will my fan run when powered from a USB port?

Fan speed drops by about 60 percent because the adapter delivers only 5 V from the USB port instead of the 12 V a typical case-fan header supplies.

What connector standard does the fan end of the cable use?

The fan end is a combined small 3-pin / 4-pin header that fits both 3-pin voltage-controlled and 4-pin PWM case fans.

How much space do I need for the cable length and thickness?

Each cable is 11.8 inch long, 22 AWG with a 0.12 inch outer diameter, so it routes easily behind a motherboard tray.

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