ARCTIC 120×38 mm High Static Pressure Fans 3-Pack

The ARCTIC S12038-4K (3 Pack) are robust 120×38 mm PWM fans built for strong static pressure, long lifespan, and flexible control—ideal for heatsinks, radiators, and 4U server chassis.

Designed for demanding cooling tasks, the S12038-4K brings a balance of airflow, pressure, and durability in a compact 120×38 mm frame. Each fan in this three-pack uses a brass-housed impeller with dual ball bearings, supplies high static pressure and up to 180 m³/h airflow, and supports PWM or voltage regulation through a standard 4-pin connector. Protective circuits guard the fan against common electrical faults, while the long cable lets you place the fan where it performs best.

How much cooling performance does the S12038-4K deliver?

This fan combines significant static pressure with strong airflow to move air efficiently through dense radiators or tight heatsinks. With a static pressure of 11.45 mmH2O and a peak airflow of 180 m³/h, it excels where resistance is high.

• Static pressure: 11.45 mmH2O for pushing through radiators and fin stacks.
• Maximum airflow: 180 m³/h for effective heat dispersion.
• 120×38 mm size for higher swept area than typical 25–25 mm fans.

Can I control fan speed and connect it to different headers?

Yes—speed is adjustable via PWM or voltage, giving you precise regulation across a wide RPM range. The fan uses a standard 4-pin plug but remains compatible with 2-pin and 3-pin headers, so it fits most motherboard or controller setups.

• 4-pin PWM connector for automated motherboard control.
• Backward compatibility with 2-pin and 3-pin headers.
• 30 cm cable for flexible routing and placement inside cases or racks.

What makes the S12038-4K durable and reliable?

Longevity is built into the mechanical and electrical design: the impeller is secured in a brass housing with two ball bearings to resist heat, dust, and mechanical wear. Multiple onboard protections reduce failure risk from electrical issues.

• Brass-housed impeller and dual ball bearings for extended life.
• Protection circuits for overvoltage, reverse polarity, and overcurrent.
• Sturdy construction suitable for continuous operation in servers or workstations.

Where can I use these fans in my system?

The S12038-4K is versatile: it fits into 4U server bays, acts as a radiator fan in water-cooling loops, or replaces CPU or chassis fans where higher pressure is required. The thicker 38 mm profile provides extra blade surface for improved performance in constrained environments.

• 4U server housings and rack systems for reliable ventilation.
• Radiator and heatsink applications needing high static pressure.
• System upgrade or replacement for older 120 mm fans seeking stronger performance.

Who is this for? Engineers, system builders, and enthusiasts who need dependable, high-pressure cooling in compact footprints will appreciate the ARCTIC S12038-4K three-pack. It suits data center racks, compact workstations, and aggressive custom cooling loops where airflow must overcome dense fins or restricted paths. If you want an easy-to-install, PWM-capable fan set with built-in electrical protections and long-term mechanical resilience, this three-pack is a practical choice.