# Noctua fan NF-A4X20 5V PWM — 40×20 mm, 5 V, 4-pin PWM, 1100–5000 RPM, 9.4 m³/h

**URL:** https://aio.lv/en/product--noctua-nf-a4x20-5v-pwm--626085
**Data updated:** 2026-01-21 10:50 (EET)
**Category:** CPU Coolers & PC Cooling Systems
**Manufacturer:** Noctua
**Manufacturer code:** NF-A4X20 5V PWM
**EAN:** 9010018100136
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 18.99 €
**Prices and availability valid until:** 2026-08-03 23:59
**Price without VAT (21%):** 15.69 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--noctua-nf-a4x20-5v-pwm--626085

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Thursday | free |
| Pickup points | 14.07.2026 | 1.89 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Compact Noctua NF-A4X20 5V PWM fan (40×20 mm) with 4‑pin PWM connector for precise speed control. Operates at 5 V with 0.1 A rated current, delivering 9.4 m³/h airflow and 2.26 mmH2O max static pressure. Speed range 1100–5000 RPM, noise up to 14.9 dB, MTBF 150,000 h. Suited for computer case cooling; screws included for 32×32 mm mounting.

## Long description

The Noctua NF-A4x20 5V PWM is a compact 40x20 mm cooling fan engineered for efficient, quiet operation in space-constrained computer and electronic applications. This 5V PWM variant incorporates advanced aerodynamic features such as Flow Acceleration Channels and an AAO frame to optimise airflow and static pressure while maintaining low noise levels. The fan uses Noctua’s custom NE-FD3 PWM IC with Smooth Commutation Drive and SSO2 bearings to ensure smooth rotation and long-term stability. Modular cabling, the OmniJoin™ Adaptor Set and a 6-year manufacturer’s warranty complete the package for dependable performance.
Advantages
The fan provides a wide rotational speed range (1100–5000 RPM) that enables precise PWM-based control of airflow and acoustics. Its aerodynamic design increases airflow (up to 9.4 m³/h) and static pressure (up to 2.26 mmH2O) for effective cooling in restricted spaces, while the NE-FD3 PWM IC and SSO2 bearings ensure low vibration, smooth running and durable operation. Built-in modular cabling and the OmniJoin™ Adaptor Set allow flexible installation and compatibility with various 5V systems.
Suitable for
Small form factor PCs and mini-ITX builds
Embedded systems and single-board computers
Router, NAS and network equipment cooling
Industrial control units and compact electronic enclosures
Key specifications
Model: Noctua NF-A4x20 5V PWM (MPN: NF-A4X20 5V PWM)
Dimensions: 40 x 20 mm
Rated voltage: 5 V
Speed range: 1100–5000 RPM (PWM controlled)
Airflow: up to 9.4 m³/h
Maximum static pressure: up to 2.26 mmH2O
Bearing: SSO2
Features: Flow Acceleration Channels, AAO frame, NE-FD3 PWM IC, Smooth Commutation Drive, modular cabling, OmniJoin™ Adaptor Set
EAN: 9010018100136
How to use
Install the fan in the desired location within the system using appropriate mounting points for a 40x20 mm fan. Connect the PWM cable to a compatible 5V PWM header or controller; the fan will adjust speed according to PWM signal between 1100 and 5000 RPM. Use the supplied modular cables and OmniJoin™ adapters if a different connector type is required. Ensure correct airflow direction and secure cabling to avoid interference with other components.
Usage recommendations
For optimal performance, place the NF-A4x20 5V PWM where it can move air directly through heat-generating components or vent channels. Use PWM control to balance cooling and noise, and follow manufacturer guidelines for mounting and electrical connections. Regularly check for dust buildup in tight enclosures to maintain airflow and prolong bearing life.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Type | Fan |
| Fan diameter | 40 mm |
| Noise level (high speed) | 14.9 dB |
| Rotational speed (min) | 1100 RPM |
| Rotational speed (max) | 5000 RPM |
| Mean time between failures (MTBF) | 150000 h |
| Airflow | 9.4 m³/h |
| Maximum air pressure | 2.26 mmH2O |
| Suitable location | Computer case |

### Design

| Feature | Value |
|---|---|
| Fan connector | 4-pin |

### Weight & dimensions

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

### Power

| Feature | Value |
|---|---|
| Power consumption (typical) | 0.5 W |
| Rated current | 0.1 A |
| Voltage | 5 |

### Packaging content

| Feature | Value |
|---|---|
| Screws included | Yes |

### Other features

| Feature | Value |
|---|---|
| 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 5V PWM fan cost, and is it available for purchase?

The price is 18.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 97 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 Thursday 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, 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.

## Image

https://aio.lv/img/cache/product/626085/65734296_large.webp