Description
The 4-pin PWM fan splitter cable is a 1-to-2 converter that runs two cooling fans from a single 4-pin PWM header. The cable 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 10.5-inch black nylon-sleeved cable supports both 3-pin and 4-pin PWM case fans. The master 4-pin output carries the full PWM and tachometer signal, while the slave 3-pin output is intentionally missing the RPM pin to prevent tachometer signal collisions when both fans report back to the same firmware channel.
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 require a powered fan hub instead.
Specifications
| Component | Specification |
|---|---|
| Quantity | 1 cable |
| Cable length | 10.5 in end-to-end |
| Header (input) connector | 4-pin PWM female (KK254 / 2.54mm pitch) |
| Master fan (output) connector | 4-pin PWM male (with RPM tachometer pin) |
| Slave fan (output) connector | 3-pin male (no RPM tachometer pin, by design) |
| Voltage | 5V or 12V DC (passive cable, passes source voltage) |
| Maximum sustained current | 1A per channel |
| Fan compatibility | Standard 3-pin and 4-pin PWM case fans |
| Cable jacket | Tangle-resistant black nylon braid |
| Cable profile | Round |
| Weight | 9.07g |
| Warranty | 90-Day limited (Solo Satoshi) |
Compatibility
The PWM fan splitter cable 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 splitter 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 Gamma, NerdQaxe+, NerdQaxe++, custom mining boards. |
| PC builds | 12V | Desktop motherboards, case fans, CPU coolers, GPU airflow rigs. |
| Home servers | 12V | .Self-hosted NAS builds, Bitcoin nodes, 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 splitter’s 4-pin female end into the host PWM header.
- Connect the primary (4-pin master) fan output to your main intake or exhaust fan. This fan reports RPM to the host firmware.
- Connect the secondary (3-pin slave) output to the second fan. The slave fan receives the same PWM duty cycle as the master and spins at the matched speed when paired with an identical fan model.
- Verify the splitter 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 splitter cable.
- 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.
