Description
ARCTIC S12038-4K PWM 120mm High Performance 3 Pack Server Fans
ACFAN00303A
The ARCTIC S12038-4K PWM (ACFAN00303A) is a powerful set of three 120 mm PWM cooling fans engineered for demanding airflow and static pressure applications like server environments, 3U+ chassis, high-load PCs, industrial cases, and radiator/heatsink cooling. The wide 600 – 4000 RPM PWM control range allows the fans to run quietly at lower loads or ramp up for more aggressive cooling when system temperatures rise.
Each fan in this 3-pack delivers strong airflow and high static pressure, making them highly effective at pushing air through restrictive panels, filters, or cooling fins. The dual ball bearing with brass housing boosts durability and reliability — ideal for continuous 24/7 operation in servers or industrial machines.
These fans are equipped with standard PWM connectors that also work with 2-pin and 3-pin headers for flexible installation, while the long cable provides installation versatility for various build setups.
Why It’s a Great Choice
Strong Airflow & Static Pressure:
With ~180 m³/h airflow and ~11.45 mm H₂O static pressure, this fan trio excels at moving air through dense filters, radiator fins, and restricted chassis areas — a great choice for servers, rack systems, and high-density PCs.
Wide PWM Control:
The 600 – 4000 RPM PWM range allows adaptive operation — running quietly when cooling needs are low and stepping up for performance under heavy workloads.
Durable Continuous Duty Design:
Dual ball bearings and a brass housing boost mechanical stability and longevity — perfect for always-on systems like servers, industrial machines, or GitLab runners.
Flexible Compatibility:
Standard 4-pin PWM connectors work with modern motherboards and controllers, and also fit older 2-pin or 3-pin headers — giving flexibility across platforms.
Professional & Industrial Use:
Designed for server racks, 3U+ cases, and high-performance builds where airflow can’t be compromised, making this 3-pack ideal for both enterprise and enthusiast cooling needs.
Confidence Through Warranty:
Backed by ARCTIC’s 6-year warranty, giving peace of mind for long-term operation even in demanding environments.
Specifications:
| Specification | Details |
|---|---|
| Brand | ARCTIC |
| Model / SKU | S12038-4K PWM (ACFAN00303A) |
| Pack Quantity | 3 Fans |
| Fan Size | 120 × 120 × 38 mm |
| Speed Range | 600 – 4000 RPM (PWM/Voltage controlled) |
| Airflow | ~180 m³/h (~106 CFM) |
| Static Pressure | ~11.45 mm H₂O |
| Bearing Type | Dual Ball Bearing with brass housing |
| Connector | 4-Pin PWM (compatible with 2/3-pin) |
| Cable Length | 300 mm |
| Voltage / Current | 12 V DC • ~0.33 A │ Start-up ~3.1 V DC |
| Operating Temp. | –10 °C to 70 °C |
| Colour | Black |
| Weight (each) | ~320 g |
| Warranty | 6 Years |
| Use Case | Server cooling, chassis intake/exhaust, radiator/heatsink airflow |






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