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Small black box with rotary knob, four 3-pin fan headers, Molex plug, 5.5×2.1 mm DC jack

EN-Labs

EN-Labs TX3CO4D 4-Channel Fan Speed Controller, Molex to 4×3-pin, 5.5×2.1 mm DC port

SKU CH-WKTZ-TZ2YD

A four-channel fan hub powers up to four 3-pin or 4-pin fans from a single Molex connector and adjusts all speeds together via a front-mounted knob from off to 100 percent.

  • Typefan speed controller
  • Connector AMolex 4pin
  • Connector B4 x TX3 3pin fan header
  • Connector Number5
  • SpecificationsType - 4 Channel Fan Speed Controller Fan quantity controlle
  • FeaturesEn-Labs TX3CO4D 3pin fan speed controller is suitable for 12
  • Controls four fans from one knob for balanced airflow
  • Stepless voltage adjustment from 0% to 100% speed
  • Molex power input keeps motherboard headers free
  • Extra 5.5×2.1 mm DC port accepts router-style 12 V adapter
  • Supports both 3-pin and 4-pin fans on every channel

4-Channel Fan Speed Controller

The EN-Labs TX3CO4D connects to a Molex power lead and provides four 3-pin headers for case, CPU, GPU or server fans. A single rotary knob adjusts the voltage supplied to every connected fan at once, from fully off up to 100 % speed. It is designed for 12 V three- or four-pin fans that accept voltage control rather than PWM signalling.

Installation and common issues

Plug the Molex connector into a spare power-supply lead, attach up to four fans to the 3-pin ports, and turn the knob to set the desired speed. All channels change together, so individual fan curves are not possible. Four-pin fans will run in voltage mode only; the PWM wire is not driven. The extra 5.5×2.1 mm DC jack accepts a 12 V adapter such as a router supply, but the unit draws a maximum of 1.5 A at 2 V across all channels combined.

Compatibility checks

Verify that your fans are rated for 12 V operation and that voltage regulation is acceptable for your cooling needs. Ensure the power supply has a free Molex connector and that total fan current will not exceed the 1.5 A limit. If you require per-fan PWM control or independent speed profiles, this controller will not meet those requirements.

Highlights

  • Controls four fans from one knob for balanced airflow
  • Stepless voltage adjustment from 0% to 100% speed
  • Molex power input keeps motherboard headers free
  • Extra 5.5×2.1 mm DC port accepts router-style 12 V adapter
  • Supports both 3-pin and 4-pin fans on every channel

Specifications

BrandEN-Labs
ModelTX3CO4D
Typefan speed controller
Connector AMolex 4pin
Connector B4 x TX3 3pin fan header
Connector Number5
SpecificationsType - 4 Channel Fan Speed Controller Fan quantity controller - 4 Channel Speed Controller method - Regulator Stepless Voltage Governor Control method - All fans speed controlled by knob simultaneously Power by - Molex 4pin Extra 5.5*2.1DC port - from external application Current - 12V 1.5A max for total 4 channel Range - 0% ~ 100%(turn off ~full speed) Controller by - Adjustable knob w/ OFF switch
FeaturesEn-Labs TX3CO4D 3pin fan speed controller is suitable for 12V CPU fan, chassis fan, video card fan, south bridge fan, north bridge fan, hard disk fan, server fan, inverter fan etc,all kinds of 3pin or 4pin fans. Advance for PC mining cooling Increase speed to reduce computer part temperature when computer parts are busy. Reduce speed to reduce noise & power consumption when computer parts are free. Supports computer parts with cooling fan, like CPU, HDD, DDR, VGA, etc. Power by Molex 4pin female Support 4 channels fan speed adjust simultaneously Fans can be turned off or adjusted to

Questions about this item

How do I confirm the controller is regulating fan speed correctly after connecting it?

Turn the knob and observe all four connected fans changing speed together from off up to 100 % simultaneously.

What comes in the box and what must I provide separately?

The unit includes the Molex-to-4×3-pin hub with the 5.5×2.1 mm DC port; you must supply a Molex power lead from the PSU and up to four 3-pin or 4-pin fans.

Which version of this controller should I choose for a 12 V fan setup?

The TX3CO4D model is built for 12 V fans and handles up to 1.5 A per channel via the Molex or the 5.5×2.1 mm DC input.

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