USB to 4-Pin PWM Fan Adapter Cable – 5V to 12V Boost
USB to 4-Pin PWM Fan Adapter Cable – 5V to 12V Boost
Power Your PC Fan from Any USB Port – 5V to 12V Boost Converter Cable
This compact USB to 4-Pin PWM fan power adapter cable lets you run a standard 12V computer chassis or CPU fan directly from a USB 5V power source. Built-in boost circuitry steps up the voltage from 5V to 12V, while the onboard adjustable speed switch gives you direct control over fan performance — no motherboard required.
Whether you're building a custom laptop cooling pad, repurposing a spare case fan, or simply need a flexible USB-powered fan solution, this adapter cable makes it quick and easy. Made in Mainland China.
Key Features
- 5V to 12V Boost Conversion – Powers standard 12V PC fans from any USB 5V source
- 4-Pin PWM Output – Compatible with standard chassis fans and CPU fans
- Adjustable Speed Switch – Built-in dial lets you fine-tune fan speed on the fly
- All-Copper Core Wire – Ensures stable current delivery and reduced heat build-up
- PVC Insulation – Durable, flexible outer sleeve for long-lasting use
- Compact & Lightweight – ~35cm cable length, easy to route in tight spaces
Specifications
- Input Voltage: 5V (USB)
- Output Voltage: 12V
- Maximum Power: 11W
- Cable Length: ~35cm (approx. 13.8 inches)
- Wire Outer Diameter: OD 3.5mm
- Insulation Material: PVC
- Input Connector: USB Type-A (5V)
- Output Connector: 4-Pin PWM fan connector
- Country of Origin: Made in Mainland China
Great For
- Powering PC case or CPU fans via USB when a PSU isn't available
- DIY laptop cooling pad builds using standard 12V fans
- Workbench fan testing without a full power supply
- Custom PC modding and low-voltage fan projects
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Frequently Asked Questions
Q: Can this USB to 4-Pin PWM cable power any standard 12V PC fan?
A: Yes — as long as your fan uses the standard 4-pin PWM connector and draws no more than 11W (the cable's maximum output power), it will work with this adapter. It's compatible with most common chassis fans and CPU fans.
Q: Does the adjustable switch actually change fan speed?
A: Yes. The onboard adjustable switch allows you to regulate the fan speed directly through the cable, giving you convenient speed control without needing a motherboard or fan controller hub.
Q: What USB power sources are compatible with this cable?
A: Any standard USB 5V power source works — including PC USB ports, USB wall chargers, and USB power banks — as long as the source can supply enough current to meet the fan's wattage needs (up to 11W maximum output).