Description
The PWM fan hub is a 1-to-5 expander that runs up to five cooling fans from a single 4-pin PWM header. The hub fits any standard 4-pin PWM fan port (KK254 / 2.54mm pitch), the same connector used on PC motherboards, Bitcoin home miners, home servers, 3D printers, and custom electronics builds. The 16-inch (40cm) black nylon-sleeved cable supports both 3-pin and 4-pin PWM case fans. Only the first port (CPU / master) returns a tachometer (RPM) signal to the host firmware. Ports 2 through 5 share the same PWM duty cycle as the master, so every connected fan ramps up and down together.
The cable is rated at 1A maximum sustained current per channel. It is a passive cable, meaning it carries whatever voltage the source header provides. On standard PC motherboards and 12V mining boards, that is 12V DC. On 5V PWM headers (such as those found on the Bitaxe Gamma 602, Bitaxe Supra, and Bitaxe Touch), the cable passes 5V signal and power correctly within its 1A rating. Fans drawing more than 1A per channel, or rigs running five high-static-pressure fans at once, require a powered fan hub with a SATA pass-through instead.
Specifications
| Component | Specification |
| Quantity | 1 fan hub |
| Cable length | 16 in (40 cm) end-to-end |
| Header (input) connector | 4-pin PWM female (KK254 / 2.54mm pitch) |
| Fan (output) connectors | 5 x 4-pin PWM male (port 1 carries RPM tachometer pin) |
| Voltage | 5V or 12V DC (passive, passes source voltage; 24V tolerant) |
| Maximum sustained current | 1A per channel |
| Wire | 24 AWG tinned copper, 11 x 0.12ts conductors |
| Insulation | PVC, 80°C rated |
| Outer diameter | 1.4mm |
| Fan compatibility | Standard 3-pin and 4-pin PWM case fans |
| RPM signal | Port 1 (master) only |
| Cable jacket | Tangle-resistant black nylon braid |
| Cable profile | Round |
| Warranty | 90-day limited (Solo Satoshi) |
Compatibility
The PWM fan hub fits any device that uses a standard 3 or 4-pin PWM fan header (KK254 / 2.54mm pitch). This is the universal connector standard for fan control across the PC, mining, server, and DIY electronics industries. The hub works with both 5V and 12V PWM headers since the cable is passive and passes the source voltage directly.
| Use Case | Typical Voltage | Common Applications |
| Bitcoin home miners | 5V or 12V | Bitaxe, Nerdaxe, NerdQaxe+, NerdQaxe++, custom mining boards. Push-pull and auxiliary cooling on stacked rigs. |
| PC builds | 12V | Desktop motherboards, full-tower case fan arrays, CPU coolers, GPU airflow rigs. |
| Home servers | 12V | Self-hosted NAS builds & home lab racks. |
| 3D printers | 12V or 24V | Hotend and part-cooling fans on Voron, Prusa, Ender, and similar 4-pin PWM printers (verify 1A current ceiling). |
| Custom electronics | 5V or 12V | Single-board computers, embedded projects, any DIY build with a 4-pin PWM fan header. |
Installation
- Power down and unplug the host device. Allow 5 minutes for the board to cool completely.
- Disconnect the existing fan from the 4-pin PWM header on the host board.
- Plug the hub’s 4-pin female end into the host PWM header.
- Connect your most critical fan (the one you want monitored in BIOS, AxeOS, or HWiNFO) to port 1. This is the master port and carries the RPM tachometer signal back to the host firmware.
- Connect the remaining four fans to ports 2 through 5. These ports receive the same PWM duty cycle as the master and spin at matched speed when paired with identical fan models.
- Verify the hub cable is not pinched against heatsinks, fan blades, or sharp PCB edges before applying power.
- Power on the host device and monitor fan RPM and component temperatures through the host firmware or web dashboard for 10 to 15 minutes before applying any overclock or load profile.
- 1 × Black sleeved 4-pin PWM fan hub (1-to-5 splitter, 16 inch).
- Same-day shipping from Houston, Texas. Orders placed before 12:00 PM CST ship the same business day.
- Expert customer support. Every support request is answered by a Solo Satoshi team member who builds with these parts daily, on home miners, PC rigs, and small server projects.
- Competitive pricing with a small business shopping experience.
