---
product_id: 534456065
title: "ARCTIC S4028-6K (5 Pack) - 40x40x28 mm Fan, 250-6000 RPM, PWM Regulated, 4-pin Connector, 12 V DC - Black"
brand: "arctic"
price: "196 kr"
currency: DKK
in_stock: false
reviews_count: 5
url: https://www.desertcart.dk/products/534456065-arctic-s4028-6k-5-pack-40x40x28-mm-fan-250-6000
store_origin: DK
region: Denmark
---

# 6000 RPM max speed 12.06 m³/h airflow Dual ball bearing durability ARCTIC S4028-6K (5 Pack) - 40x40x28 mm Fan, 250-6000 RPM, PWM Regulated, 4-pin Connector, 12 V DC - Black

**Brand:** arctic
**Price:** 196 kr
**Availability:** ❌ Out of Stock

## Summary

> 🖤 Small Fan, Big Impact: Arctic S4028-6K keeps your tech cool and your workspace sleek.

## Quick Answers

- **What is this?** ARCTIC S4028-6K (5 Pack) - 40x40x28 mm Fan, 250-6000 RPM, PWM Regulated, 4-pin Connector, 12 V DC - Black by arctic
- **How much does it cost?** 196 kr with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/534456065-arctic-s4028-6k-5-pack-40x40x28-mm-fan-250-6000)

## Best For

- arctic enthusiasts

## Why This Product

- Trusted arctic brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Mighty:** 40x40x28 mm size fits tight spaces like 1U servers, routers, and mini PCs without compromise.
- • **Precision PWM Control:** Seamlessly adjust fan speed from whisper-quiet to powerful cooling with 4-pin PWM regulation.
- • **Versatile Compatibility:** Works flawlessly with 2, 3, or 4-pin headers and includes a 40 cm cable for flexible installation.
- • **Balanced Airflow & Noise:** Delivers 12.06 m³/h airflow at a max 38 dB noise level—cool your gear without the distraction.
- • **Enduring Dual Ball Bearings:** Engineered for longevity and resilience against heat and dust, ensuring consistent performance.

## Overview

The ARCTIC S4028-6K is a high-performance 40mm fan designed for professional-grade cooling in compact environments. Featuring a wide 250-6000 RPM speed range with PWM control, dual ball bearings for durability, and a robust airflow of 12.06 m³/h at a low noise level of 38 dB, it excels in 1U servers, NAS devices, and mini PCs. Its versatile 4-pin connector and 40 cm cable ensure easy integration, making it the go-to choice for efficient, quiet cooling where space and reliability matter.

## Description

ARCTIC offers innovative solutions incessantly - changing impossible user requirements into new. Always focused on our customers, ARCTIC is devoted to deliver excellence through a strong dedication and a high sense of commitment. In light of the ever-changing consumer landscapes, we aspire to continue to expand and diversify our products and solutions. From computer cooling and peripherals to audio and digital home entertainment, we strive to enrich people's lives by creating innovative, user friendly yet affordable products with a great value of benefit. For us value for money is a key factor - a constant our customers rely on.

Review: I picked up one of the 6,000rpm variants of these fans to aim at the 12VHPWR connector on my RTX 5090—you know, just to be safe. I even 3D printed a little right-angle duct adapter to funnel air down over the connector itself. Ultimately, I ended up removing it from the system because I found the noise output unacceptable, even at very low operating speeds. ➤ The Challenge with 40mm Fans 40mm fans can be tricky with noise. Twenty to thirty years ago, 40x10mm was a common size on chipsets and video cards, and I've had quite a few fans in that form factor that were essentially inaudible when installed in a case. I've also had other 40mm fans—like these Arctics—that produce specific tones that pierce through just about anything you mount them to or in. In terms of quantitative noise levels, these are very quiet fans for what they are. I have some 40mm Sanyo Denkis on a 2.5" drive cage that max out at about 13,000rpm and are audible across the house at 8,000rpm; these Arctics are nothing like that. Qualitatively though, the noise these produce is specifically irritating to me. I can sit next to the server with those Sanyo Denkis screaming away and after a few minutes stop noticing them. A cynic might point out that this is because after a few minutes next to that server, I've gone deaf, but this is neither here nor there. By contrast, the single Arctic I had on the 5090, running at ~2,000rpm, was far more irritating in spite of being far quieter. It was *just* audible as a faint ticking buzz over the rest of the system. And unfortunately, at ~2,000rpm, it didn't move enough air to make a difference in my use case, so it was just added irritation with no benefit. It's not that they're loud—it's that the specific tone they make, even in the context of what they are, is particularly grating to me. But this is intrinsically subjective, so your experience may differ. ➤ Use Case Matters For their intended use case (in a 1U server), these are extremely quiet and highly power efficient. For use in a desktop, they become meaningfully audible far before they move a meaningful amount of air. As far as 40mm fans go, these are outstanding. But unless you have a specific need for a 40mm fan, you would generally be better served finding an alternative way to accomplish whatever task you're considering these for. ➤ Bottom Line I can't and won't knock any stars off the fan itself—these earn the full five stars easily. They're power-efficient, quiet for what they are, dual ball bearing, exceptionally well-built, and Arctic provides actual performance data including P/Q curves and PWM curves. Both are generally absent with consumer-grade fans and are hugely useful if you know how to read them, signaling that Arctic is serious about selling these for actual industrial/server use. For the home/enthusiast/desktop user, these are clearly audible below 2,000rpm, and probably outright unacceptable over 3,000rpm. If you have a specific need for them, I'd recommend them very highly. On balance these are likely the best 40mm fans on the market. At the same time, if you can accomplish your goal with a larger fan, you'd probably be happier going that route.
Review: El performance de los ventiladores es muy bueno definitivamente cumplen con su función, tanto para servidores, NAS o para agregar un extra de ventilación a los headsync de la tarjeta madre funcionan a la perfección, el flujo de aire es bastante bueno y con bajo nivel de ruido. en comparación con la competencia NcTua, creo que valen cada peso de lo que cuesta el paquete de 5 es excelente y son PWM

## Features

- The S4028-6K's impeller is held in place by two ball bearings, making it both especially durable as well as less sensitive to external influences such as heat and dust
- The S4028-6K has a particularly wide speed range that can be regulated via PWM and voltage. With its 6000 RPM max it offers a well-balanced ratio between cooling power and noise
- With a static pressure of 4.2 mm/H2O and a maximum airflow of 12.06 m³/h, the S4028-6K is a true all-rounder and is suitable as both radiator and case fan
- The S4028-6K fits in 1U server cases as a replacement fan for routers, switches, and NAS. It can also be used for other products such as DVRs, Mini PCs, HTPCs, hard disk enclosures and 3D printers
- The fan has a standard 4-pin fan connector and can also be connected and controlled on 2-pin or 3-pin headers, while its 40 cm cable allows enough flexibility in positioning

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09S9V86P7 |
| Air Flow Capacity | 12.06 Cubic Meters Per Hour |
| Are batteries included? | No |
| Brand | ARCTIC |
| Colour | black |
| Compatible Devices | Printer, Server |
| Cooling Method | Air |
| Customer Reviews | 4.5 4.5 out of 5 stars (132) |
| Date First Available | 8 July 2022 |
| Item Dimensions LxWxH | 40 x 40 x 28 Millimeters |
| Item Height | 28 Millimeters |
| Item Weight | 249 g |
| Item Width | 40 Millimeters |
| Item model number | ACFAN00273A |
| Manufacturer | ARCTIC |
| Maximum Rotational Speed | 6000 RPM |
| Model number | ACFAN00273A |
| Net Quantity | 5.0 Count |
| Noise Level | 38 Decibels |
| Number of Items | 5 |
| Power Connector Type | 4-Pin |
| Product Dimensions | 4 x 4 x 2.8 cm; 249 g |
| UPC | 840033401623 |
| Voltage | 12 Volts |
| Wattage | 1.2 Watts |

## Product Details

- **Brand:** ARCTIC
- **Cooling Method:** Air
- **Power Connector Type:** 4-Pin
- **Voltage:** 12 Volts
- **Wattage:** 1.2 Watts

## Images

![ARCTIC S4028-6K (5 Pack) - 40x40x28 mm Fan, 250-6000 RPM, PWM Regulated, 4-pin Connector, 12 V DC - Black - Image 1](https://m.media-amazon.com/images/I/51rtJ3KnbpL.jpg)
![ARCTIC S4028-6K (5 Pack) - 40x40x28 mm Fan, 250-6000 RPM, PWM Regulated, 4-pin Connector, 12 V DC - Black - Image 2](https://m.media-amazon.com/images/I/51tHzOmapnL.jpg)
![ARCTIC S4028-6K (5 Pack) - 40x40x28 mm Fan, 250-6000 RPM, PWM Regulated, 4-pin Connector, 12 V DC - Black - Image 3](https://m.media-amazon.com/images/I/71x8fI4+ddL.jpg)
![ARCTIC S4028-6K (5 Pack) - 40x40x28 mm Fan, 250-6000 RPM, PWM Regulated, 4-pin Connector, 12 V DC - Black - Image 4](https://m.media-amazon.com/images/I/61kMQkdOqsL.jpg)
![ARCTIC S4028-6K (5 Pack) - 40x40x28 mm Fan, 250-6000 RPM, PWM Regulated, 4-pin Connector, 12 V DC - Black - Image 5](https://m.media-amazon.com/images/I/71tsYPrQcwL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by S***S on 13 October 2025*

I picked up one of the 6,000rpm variants of these fans to aim at the 12VHPWR connector on my RTX 5090—you know, just to be safe. I even 3D printed a little right-angle duct adapter to funnel air down over the connector itself. Ultimately, I ended up removing it from the system because I found the noise output unacceptable, even at very low operating speeds. ➤ The Challenge with 40mm Fans 40mm fans can be tricky with noise. Twenty to thirty years ago, 40x10mm was a common size on chipsets and video cards, and I've had quite a few fans in that form factor that were essentially inaudible when installed in a case. I've also had other 40mm fans—like these Arctics—that produce specific tones that pierce through just about anything you mount them to or in. In terms of quantitative noise levels, these are very quiet fans for what they are. I have some 40mm Sanyo Denkis on a 2.5" drive cage that max out at about 13,000rpm and are audible across the house at 8,000rpm; these Arctics are nothing like that. Qualitatively though, the noise these produce is specifically irritating to me. I can sit next to the server with those Sanyo Denkis screaming away and after a few minutes stop noticing them. A cynic might point out that this is because after a few minutes next to that server, I've gone deaf, but this is neither here nor there. By contrast, the single Arctic I had on the 5090, running at ~2,000rpm, was far more irritating in spite of being far quieter. It was *just* audible as a faint ticking buzz over the rest of the system. And unfortunately, at ~2,000rpm, it didn't move enough air to make a difference in my use case, so it was just added irritation with no benefit. It's not that they're loud—it's that the specific tone they make, even in the context of what they are, is particularly grating to me. But this is intrinsically subjective, so your experience may differ. ➤ Use Case Matters For their intended use case (in a 1U server), these are extremely quiet and highly power efficient. For use in a desktop, they become meaningfully audible far before they move a meaningful amount of air. As far as 40mm fans go, these are outstanding. But unless you have a specific need for a 40mm fan, you would generally be better served finding an alternative way to accomplish whatever task you're considering these for. ➤ Bottom Line I can't and won't knock any stars off the fan itself—these earn the full five stars easily. They're power-efficient, quiet for what they are, dual ball bearing, exceptionally well-built, and Arctic provides actual performance data including P/Q curves and PWM curves. Both are generally absent with consumer-grade fans and are hugely useful if you know how to read them, signaling that Arctic is serious about selling these for actual industrial/server use. For the home/enthusiast/desktop user, these are clearly audible below 2,000rpm, and probably outright unacceptable over 3,000rpm. If you have a specific need for them, I'd recommend them very highly. On balance these are likely the best 40mm fans on the market. At the same time, if you can accomplish your goal with a larger fan, you'd probably be happier going that route.

### ⭐⭐⭐⭐⭐ Review
*by I***S on 4 July 2023*

El performance de los ventiladores es muy bueno definitivamente cumplen con su función, tanto para servidores, NAS o para agregar un extra de ventilación a los headsync de la tarjeta madre funcionan a la perfección, el flujo de aire es bastante bueno y con bajo nivel de ruido. en comparación con la competencia NcTua, creo que valen cada peso de lo que cuesta el paquete de 5 es excelente y son PWM

### ⭐⭐⭐⭐⭐ Review
*by J***L on 10 February 2024*

I bought 2 of these fans to use in my remote control vehicles. I had to convert it to a 3 wire plug, (YouTube has a video using these fans) but they really pump the air and keeps my motors a lot cooler when bashing on my trucks.

## Frequently Bought Together

- ARCTIC S4028-6K (5 Pack) - 40x40x28 mm Server Fans, 250–6000 RPM, PWM Regulated, 4-pin Connector, 12 V DC, Rack Cooling Fan - Black
- Noctua NF-A4x20 PWM, Premium Quiet Fan, 4-Pin (40x20mm, Brown)
- Noctua NF-A4x10 FLX, Premium Quiet Fan, 3-Pin (40x10mm, Brown)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-03-02*