DC 5521 to Dual 4-Pin PWM Fan Power Adapter Cable 12V
DC 5521 to Dual 4-Pin PWM Fan Power Adapter Cable 12V
DC 5521 to Dual 4-Pin PWM Fan Power Adapter Cable – 12V, 2-Way Split
Power two computer or router fans directly from a DC barrel jack with this handy DC 5521 to 4-Pin PWM 2-Way Adapter Cable. Designed for builders and hobbyists who need to connect standard PC-style 4-pin PWM fans to a 12V DC power source, this compact Y-splitter cable eliminates the need for a full ATX power supply in custom rigs, router mods, and open-frame builds.
Made in Mainland China.
Key Features
- Interface: 1× DC 5521 (5.5mm/2.1mm barrel) input, 2× 4-Pin PC fan connectors output
- Total Wire Length: 35 cm (main cable: 20 cm | branch cables: 15 cm each)
- Conductor Material: Pure copper for reliable, low-resistance power delivery
- Main Wire Gauge: 22AWG (17 × 0.12 mm strands)
- Branch Wire Gauge: 24AWG (11 × 0.12 mm strands)
- Main OD: 4.5 mm | Branch OD: 3.0 mm
- Insulation: PVC — flexible and durable
- Rated Temperature: Up to 80°C
- Wire Color: Black
- Weight: 16 g
- Operating Voltage: 12V DC
What's in the Box?
- 1× DC 5521 to Dual 4-Pin PC Fan Adapter Cable
Perfect For
- Custom PC or open-frame builds powered by a DC adapter
- Router or NAS cooling fan upgrades
- Workbench and lab cooling setups
- Any project requiring 4-pin PWM fans powered via a barrel jack supply
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Frequently Asked Questions
Q: What fans is this DC 5521 to 4-Pin PWM adapter cable compatible with?
A: This cable is compatible with any standard PC 4-pin PWM cooling fan — including case fans, CPU fans, and router fans — that operates at 12V DC. The DC 5521 (5.5mm × 2.1mm) barrel connector plugs into most common 12V DC wall adapters and power bricks.
Q: Does this cable support PWM fan speed control?
A: The cable passes through all four pins of the 4-pin PWM connector, so PWM speed control signals will be carried if your DC power source or controller outputs a PWM signal. Note that a standard DC barrel jack adapter does not generate a PWM control signal — you would need a separate PWM controller for variable fan speed regulation.
Q: How many fans can I connect with this adapter?
A: This is a 2-way Y-splitter cable, allowing you to connect up to two 4-pin PWM fans simultaneously from a single DC 5521 power source. Ensure your 12V DC power supply can provide sufficient current for both fans combined.
Q: What is the total length of the cable?
A: The total cable length is 35 cm — with a 20 cm main trunk from the DC 5521 connector and two 15 cm branch cables leading to each 4-pin fan connector.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.