# Fan Noctua NF-A4x20 PWM 40 mm, 4-pin PWM, 5–12 V, 1200–5000 RPM, 9.4 m³/h, 14.9 dB, 32×32 mm mounting

**URL:** https://aio.lv/en/product--noctua-nf-a4x20-pwm--506704
**Data updated:** 2026-01-21 10:50 (EET)
**Category:** CPU Coolers & PC Cooling Systems
**Manufacturer:** Noctua
**Manufacturer code:** NF-A4X20 PWM
**EAN:** 9010018100105
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 19.49 €
**Prices and availability valid until:** 2026-07-29 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-pwm--506704

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Friday | free |
| Pickup points | 08.07.2026 | 1.89 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Noctua NF-A4x20 PWM is a 40 mm computer fan with a 4‑pin PWM connector, supporting 5–12 V input and a power draw of 0.6 W (max current 0.05 A). It delivers up to 9.4 m³/h airflow (8.3 m³/h with LNA), rotational speeds from 1200 to 5000 RPM (4400 RPM with LNA), and noise levels as low as 12.2 dB with LNA. Designed for case cooling, it includes screws, a low‑noise adaptor and a fan cable; mounting pattern is 32×32 mm. Mean time to failure is 150,000 h.

## Long description

The Noctua NF-A4x20 PWM is a compact 40x20mm premium-quality fan engineered for efficient cooling in space-restricted and high-resistance applications. It features an advanced aerodynamic design with Flow Acceleration Channels and Noctua's AAO frame to improve airflow efficiency and reduce noise. The PWM model uses Noctua's custom NE-FD1 PWM IC with Smooth Commutation Drive (SCD) for quiet automatic speed control and is supplied with a Low-Noise Adaptor and an OmniJoin™ adaptor set for flexible connectivity. The fan offers a wide speed range (1200–5000 RPM), high static pressure performance and extensive cabling options, and it is backed by a 6-year manufacturer’s warranty.
Advantages
The NF-A4x20 combines optimized blade and frame features such as Flow Acceleration Channels, Stepped Inlet Design and Inner Surface Microstructures to increase efficiency and lower vortex and intake noises. Its AAO frame integrates soft anti-vibration pads for reduced vibration transmission while maintaining compatibility with standard mounting systems. The refined SSO2 bearing improves stabilization, precision and durability, and the NE-FD1 PWM IC with SCD reduces PWM switching noise for quieter low-speed operation. The included Low-Noise Adaptor, OmniJoin™ adaptor set, sleeved cables and Y-splitter provide flexible installation options.
Suitable for
Compact computer cases and small form factor (SFF) systems
Cooling heatsinks and dense radiators with high airflow resistance
Embedded systems, network equipment and proprietary fan-header devices using 40mm fans
Key specifications
Size: 40 x 20 mm
Speed range: 1200–5000 RPM (max), L.N.A. caps max to 4400 RPM
Airflow: 9.4 m³/h (typical, manufacturer data)
Static pressure: approx. 1.75–2.26 mmH2O (manufacturer data)
Voltage: compatible with 5–12 V systems
Connector: 4-pin PWM; includes OmniJoin™ adaptor set and 4-pin Y-cable
Cabling: 20 cm primary cable, 30 cm extension, all sleeved
Bearing: SSO2
Colour: beige / brown
Warranty: 6 years; MTTF \>150,000 h
How to use
Install the NF-A4x20 PWM in your device using the standard mounting holes or compatible fan clips on heatsinks. Connect the 4-pin PWM connector to a motherboard or controller PWM header for automatic speed control; alternatively use the OmniJoin™ adaptors to connect to proprietary fan headers after attaching the supplied Scotchlok™ connectors to the original cable. Use the included extension cable or the Y-splitter as needed to reach headers or to control a second fan from the same PWM signal. Apply the Low-Noise Adaptor if you want to limit the maximum speed to 4400 RPM or run the fan at that fixed speed.
Usage recommendations
For optimal performance in restricted airflow environments, orient the fan so that the Stepped Inlet Design faces the intake direction and ensure secure mounting with the integrated anti-vibration pads. Use PWM control for automatic speed scaling and fit the L.N.A. when lower maximum RPM is desired.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Type | Fan |
| Fan diameter | 40 mm |
| Supported processor sockets | Not supported |
| Noise level (high speed) | 14.9 dB |
| Rotational speed (min) | 1200 RPM |
| Rotational speed (max) | 5000 RPM |
| Compatible processor series | Not supported |
| Airflow | 9.4 m³/h |
| Minimum air pressure | 1.75 mmH2O |
| Maximum air pressure | 2.26 mmH2O |
| Pulse-width modulation (PWM) support | Yes |
| 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 | 4-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 | 5 - 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 PWM 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 — 275 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 Friday 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 PWM 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/506704/65734257_large.webp