USB to 4-Pin PWM 5V–12V Fan Power Adapter Converter Cable
USB to 4-Pin PWM 5V–12V Fan Power Adapter Converter Cable
USB to 4-Pin PWM Fan Power Adapter Converter Cable
Power your PC chassis fan or CPU fan directly from a USB port with this compact 5V to 12V boost converter cable. Whether you're building a custom laptop cooling pad, repurposing a PC fan for a DIY project, or simply need to run a 12V fan from a USB power source, this adapter cable makes it quick and easy — no additional power supply required.
Made in Mainland China.
Key Features
- 5V USB Input → 12V Fan Output: Built-in boost converter steps up standard USB 5V power to the 12V required by most PC fans.
- 4-Pin PWM Connector: Compatible with standard 4-pin chassis and CPU fans for reliable, stable power delivery.
- Adjustable Speed Switch: Inline control switch lets you fine-tune fan speed to balance airflow and noise to your preference.
- All-Copper Core Wire: Ensures efficient power transmission with minimal energy loss.
- PVC Insulation: Durable outer jacket protects wiring and provides long-lasting performance.
- Compact & Portable: ~35cm (approx. 13.8 in) cable length — ideal for desktop setups, DIY cooling pads, and custom builds.
- Maximum Power: Supports up to 11W output — sufficient for most standard PC fans.
Specifications
| Input Voltage | 5V (USB) |
| Output Voltage | 12V |
| Maximum Power | 11W |
| Cable Length | ~35cm / ~13.8 inches |
| Wire Outer Diameter | OD 3.5mm |
| Insulation Material | PVC |
| Input Connector | Standard USB-A |
| Output Connector | 4-Pin Fan (PWM) |
Perfect For
- Powering PC chassis or CPU fans via a USB port or power bank
- Converting existing PC fans for use in DIY laptop cooling pads
- Custom PC builds and mod projects requiring flexible fan power options
- Workshop or bench cooling setups using available USB power sources
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Frequently Asked Questions
Q: Will this USB to 4-Pin fan power adapter work with any USB power source?
A: Yes — the cable accepts any standard 5V USB-A power source, including PC USB ports, USB wall adapters, and power banks. Just ensure your USB source can supply enough current for the fan you're powering (the cable supports up to 11W maximum output).
Q: Is this cable compatible with 3-pin fans as well as 4-pin PWM fans?
A: The output connector is a standard 4-pin fan connector. While it may physically fit a 3-pin fan with an adapter, it is designed and optimized for 4-pin PWM chassis and CPU fans. The speed adjust switch allows manual fan speed control regardless of PWM support.
Q: Can I use this cable to build a DIY laptop cooling pad with a PC fan?
A: Absolutely! This is one of the most popular uses for this cable. Simply connect your preferred 12V PC fan to the 4-pin output and plug the USB end into your laptop's USB port or a USB charger to create a custom, effective cooling solution.
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.