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Black 3-pin fan voltage reducer cable 20cm long

Phobya

Phobya 81074 3-Pin Fan 12V to 5V Reducer 20cm Black

SKU CH-3Y6C-FS7F1

Reduces 12V fan supply to 5V for quieter operation using a 20cm black 3-pin cable

  • Product colorBlack
  • Key featuresThe cable reduces the voltage supplied to a 12 V fan to 5 V.
  • Reduces fan voltage from 12V to 5V for quieter operation
  • Lowers power draw to suit power-hungry builds
  • 20 cm length gives flexible routing inside the case
  • 3-pin connector fits standard 12V fans directly
  • Black cable with dark-blue accents for a clean look

Voltage Reducer Cable

The Phobya 81074 is a 20cm black adapter that steps a 12V three-pin fan supply down to 5V. It is intended for system builders who want quieter cooling without replacing their existing fans. The cable plugs inline between the motherboard header or fan controller and the fan itself. It suits anyone running a power-hungry rig where lower airflow noise is preferred over maximum RPM.

Sustained Operation Behaviour

By halving the input voltage the cable continuously limits motor speed, so acoustic output stays reduced for as long as the system runs. There is no thermal throttling or pulse-width cycle to manage because the reduction is passive and constant. The fan receives a steady 5V feed regardless of load duration, delivering predictable noise levels during extended gaming or rendering sessions. Power draw from the header also drops proportionally with the lower voltage.

Deciding Specification

The only figure that determines compatibility is the 12V-to-5V step-down ratio built into the 81074 model. If your fan requires the full 12V to start reliably or to move sufficient air for your thermal target, this cable will not meet that need. Buyers who need variable speed control or a different voltage target cannot use this fixed reducer. It serves a single, defined conversion and nothing else.

How it compares

Measured against everything we stock in USB & Parallel Printer Cables, at today’s prices. Recalculated every night.

Price $1.17
Cheaper than about 99% of the 127 comparable items (median $11.99).

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Specifications

Product
Brand namePhobya
Model name81074
Product colorBlack

Questions about this item

How much quieter does a 12V fan run when this 20cm reducer drops it to 5V?

Dropping the supply from 12V to 5V slows the fan considerably, which lowers the noise output. The exact decibel change depends on the fan model, but the voltage cut is the direct cause of the quieter operation.

What connector must my fan already have to plug into this 3-pin reducer?

The reducer accepts a standard 3-pin fan header, so the fan you want to slow down must terminate in a matching 3-pin plug.

Will this 12V-to-5V cable work with an older 3-pin fan that has no PWM pin?

Yes. The reducer simply passes the lowered 5V through the same three pins, so non-PWM 3-pin fans run at the reduced speed without any compatibility issue.

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