Internal power cable DELOCK 84540 — 4-pin PWM to 4×4-pin PWM splitter, 0.4 m

DELOCK 84540 internal power cable is a 0.4 m PWM splitter that converts one 4-pin PWM header into four 4-pin PWM outputs. The cable includes a single 4-pin PWM input connector and four 4-pin PWM output connectors, allowing multiple PWM-controlled fans or peripherals inside a PC or server chassis to be powered and signalled from one motherboard header. The compact 0.4 m length and black color make it suitable for neat routing inside cases and racks where short, internal fan cabling is required.

Advantages

This Delock 4-pin PWM to 4×4-pin PWM splitter enables centralised control of multiple fans using a single PWM header, reducing the need for extra fan controllers or multiple motherboard headers. With 22 AWG wiring and support for typical 12 V fan systems, the cable supports simultaneous power and PWM signal distribution while keeping internal cable management tidy. The straightforward connector arrangement simplifies installation and replacement of fan cabling in desktops and servers.

Suitable for

• Connecting up to four 4-pin PWM fans to one motherboard PWM header
• Expanding fan connections in desktop PCs and small servers
• Centralised PWM fan control and monitoring from a single header
• Short internal cable runs for case or rack-mounted systems

Key specifications

• Connector configuration: 1 × 4-pin PWM input to 4 × 4-pin PWM outputs
• Cable length: 0.4 m
• Cable gauge: 22 AWG
• Pitch: 2.54 mm
• Rated voltage: max. 12 V
• Rated current: max. 1 A per output
• Color: black
• Connector orientation: straight 4-pin PWM male/female as applicable

How to use

Connect the single 4-pin PWM input connector to the motherboard or a PWM-capable fan header, ensuring correct pin alignment for power, ground, tachometer and PWM signal. Plug each 4-pin PWM output connector into the corresponding fan or PWM peripheral. Verify that total current draw does not exceed the specified limits and that the motherboard header supports connected fan types. Route the cable inside the chassis to avoid obstructing airflow or interfering with moving parts.

Recommendations

Do not exceed the maximum current rating per output and confirm motherboard header capabilities before connecting multiple fans. For high-current fans or many devices, consider using a powered fan hub or separate power source. Keep the 0.4 m cable length in mind when planning fan placement to ensure connectors reach without strain.