# Noctua fan NF-A4x20 FLX 40 mm, 12 V, 0.6 W, 5000 RPM max, 9.4 m³/h, 32x32 mm mount

**URL:** https://aio.lv/en/product--noctua-nf-a4x20-flx--485986
**Data updated:** 2026-01-21 10:49 (EET)
**Category:** CPU Coolers & PC Cooling Systems
**Manufacturer:** Noctua
**Manufacturer code:** NF-A4X20 FLX
**EAN:** 9010018100112
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 19.49 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 16.11 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--noctua-nf-a4x20-flx--485986

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.06.2026 | free |
| Pickup points | 03.07.2026 | 1.89 EUR |
| Courier delivery to door | 03.07.2026 | 4.99 EUR |

## Summary description

Noctua NF-A4x20 FLX is a 40 mm computer case fan with a 3‑pin connector, 12 V supply and 0.6 W power consumption. It delivers up to 9.4 m³/h airflow at a maximum 5000 RPM (3700–5000 RPM range) and up to 2.26 mmH2O static pressure. Features SSO bearing, included mounting screws, fan cable and low‑noise adaptor (LNA). Ideal for compact PC cases and small cooling assemblies with a 32×32 mm mounting pattern.

## Long description

The Noctua NF-A4x20 FLX is a premium 40×20 mm computer cooling fan engineered for demanding, space‑restricted applications. With a thickness twice that of Noctua’s 40×10 mm model, it delivers increased static pressure and stable airflow. The FLX variant offers three fixed speed settings (5000 / 4400 / 3700 RPM) via supplied Low-Noise Adaptors and includes the OmniJoin™ adaptor set and extension cabling for easy connection to various proprietary headers and power sources. The fan features advanced aerodynamic measures, a refined SSO2 bearing and Noctua’s AAO frame to ensure long life, smooth operation and low noise.
Advantages
The NF-A4x20 FLX combines Flow Acceleration Channels, Stepped Inlet Design and Inner Surface Microstructures to reduce flow separation and vortex noise while increasing efficiency and suction capacity in constrained spaces. Integrated extra‑soft silicone anti‑vibration pads minimise vibration transmission without affecting compatibility with standard mounts. The Smooth Commutation Drive 2 reduces torque variation and switching noises for exceptionally smooth and quiet operation, and the optimised SSO2 bearing improves stabilisation, precision and lifespan. The kit includes OmniJoin™ adaptors, sleeved cabling, a 3:4 pin adaptor and a 6‑year manufacturer’s warranty.
Suitable for
Cooling small form‑factor cases and HTPCs with restricted airflow
High‑resistance applications such as dense heatsinks, radiators or obstructed vents
Devices requiring connection to proprietary 40 mm fan headers via OmniJoin™
Key specifications
Model: Noctua NF-A4x20 FLX (MPN: NF-A4X20 FLX, EAN: 9010018100112)
Size: 40 × 20 mm
Speed settings: 5000 / 4400 / 3700 RPM (via adapters)
Airflow (manufacturer data): 9.4 m³/h
Max. static pressure (manufacturer data): 2.26 mmH2O
Bearing: SSO2 (self‑stabilising oil‑pressure bearing)
Voltage: 12 V
Colour: Brown / Beige
Included accessories: Low‑Noise/Ultra‑Low‑Noise Adaptors, OmniJoin™ adaptor set, 30 cm extension, 3:4 pin adaptor
Warranty / Lifespan: MTTF \>150,000 h, 6‑year manufacturer’s warranty
How to use
Install the NF-A4x20 FLX in the designated 40 mm fan slot using standard mounting holes or clips; the integrated anti‑vibration pads maintain compatibility with common heatsink mounts. Choose the appropriate Low‑Noise or Ultra‑Low‑Noise Adaptor to set the fan speed to 5000, 4400 or 3700 RPM according to your cooling vs. noise requirements. Use the supplied OmniJoin™ adaptor set to connect the fan to proprietary 40 mm headers by cutting the original cable and securing connections with the included 3M Scotchlok™ connectors. Use the 30 cm sleeved extension or the 3:4 pin adaptor to reach power supply connectors if needed.
Usage recommendations
For optimal performance in high‑resistance environments, place the NF-A4x20 FLX as close as possible to the heat source and choose a higher speed setting if increased static pressure is required; for quieter operation in less obstructed configurations, use the lower speed adaptors.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Type | Fan |
| Fan diameter | 40 mm |
| Supported processor sockets | Not supported |
| Noise level (low speed) | 8.5 dB |
| Noise level (high speed) | 14.9 dB |
| Rotational speed (min) | 3700 RPM |
| Rotational speed (max) | 5000 RPM |
| Compatible processor series | Not supported |
| Airflow | 9.4 m³/h |
| Minimum air pressure | 1.23 mmH2O |
| Maximum air pressure | 2.26 mmH2O |
| Bearing type | Self-Stabilising Oil-pressure Bearing (SSO) |
| Rotational speed with LNA (max) | 4400 RPM |
| Airflow with LNA (max) | 8.3 m³/h |
| Noise level with LNA (max) | 12.2 dB |
| Suitable location | Computer case |

### Design

| Feature | Value |
|---|---|
| Product colour | Brown, Beige |
| Fan connector | 3-pin |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 20 mm |
| Width | 40 mm |
| Depth | 40 mm |

### Power

| Feature | Value |
|---|---|
| Power supply | 0.6 W |
| Maximum current | 0.05 A |
| Voltage | 12 |

### Packaging content

| Feature | Value |
|---|---|
| Cables included | Fan |
| Screws included | Yes |
| Low-noise adaptor (LNA) | Yes |

### Other features

| Feature | Value |
|---|---|
| Mean time to failure (MTTF) | 150000 h |
| Mounting hole pattern (W x D) | 32 x 32 |

### Logistics data

| Feature | Value |
|---|---|
| Harmonized System (HS) code | 84733080 |

## FAQ

### How much does the Noctua NF-A4x20 FLX 40 mm fan cost, and is it available for purchase?

The price is 19.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 169 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 30.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Noctua products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Noctua service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: type, fan diameter, supported processor sockets, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for Noctua NF-A4x20 FLX 40 mm fan?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/485986/65734210_large.webp