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Upgrade Your Electronics Cooling for Silence and Reliability
The Noctua NF-A4x20 FLX fan delivers exceptional quiet cooling performance for compact electronics in India. Its 40x40x20mm size is perfect for 1U applications, network switches, routers, NAS devices, and DVRs, replacing noisy stock fans with superior Noctua engineering. This USA-sourced component ensures reliable operation.
Featuring Noctua's award-winning A-series design with Flow Acceleration Channels and an Advanced Acoustic Optimisation frame, this fan minimizes turbulence and noise. The 3-pin FLX version includes Low-Noise Adaptors, allowing you to select between 5000, 4400, or 3700 RPM speeds to balance maximum airflow with near-silent operation, all while maintaining a maximum noise level of 14.9 dB(A) and boasting a MTTF of over 150,000 hours.
This fan is designed for easy integration into your existing setup. It comes with anti-vibration mounts, fan screws, an extension cable, and an OmniJoin adaptor set, ensuring compatibility with various proprietary fan headers. While Noctua fans are renowned globally for their quality, crowcrowcrow ensures your purchase is handled with care, including all customs duties and GST, for a seamless import experience to India.
Engineered for Silence and Performance
Noctua's A-series fans are globally recognized for their exceptional quiet cooling. The NF-A4x20 FLX utilizes Flow Acceleration Channels and an Advanced Acoustic Optimisation frame to reduce turbulence and noise. This fan is built with premium fibre-glass reinforced PBT material and boasts an impressive MTTF of over 150,000 hours, ensuring longevity. Unlike generic fans, Noctua's engineering provides a noticeable difference in both noise reduction and cooling efficiency, making it a worthwhile investment for critical equipment where reliability and quiet operation are paramount.
Ideal for Indian IT Infrastructure
This fan is perfect for IT professionals and enthusiasts in India looking to upgrade cooling in compact servers, routers, or NAS devices. It's particularly useful for those in humid or warm climates where efficient cooling prevents overheating and extends equipment lifespan. While many local fans offer basic cooling, the NF-A4x20 FLX provides a premium, quiet solution that minimizes distractions in home or office environments. If you require a fan for a standard desktop PC case, this 40mm size is too small; opt for larger Noctua case fans instead.
Typical situations where Noctua NF-A4x20 FLX 40mm Fan | 40x20mm helps — illustrative scenarios, not customer reviews.
Upgrading a noisy network switch in a home office.
The Noctua NF-A4x20 FLX fan replaces the loud stock fan, reducing noise to a whisper. Using the Low-Noise Adaptor, it can be set to a very low RPM, ensuring a quiet working environment without sacrificing essential network equipment cooling.
Replacing a failing fan in a 1U server rack in a small business.
This 40x20mm fan fits perfectly into 1U chassis. Its high MTTF and 6-year warranty provide peace of mind for critical infrastructure, ensuring continuous operation and preventing overheating issues common in densely packed server environments.
| Compatible Devices | Desktop, 1U Servers, Network Switches, Routers, NAS, DVRs |
| Installation | Includes anti-vibration mounts, screws, extension cable, OmniJoin adaptor set |
| Speed Settings | 3000/3700/4400/5000 RPM via LNA (Low-Noise Adaptor) |
| Power Consumption | 0.6W |
| Feature | Noctua NF-A4x20 FLX | Others |
|---|---|---|
| Noise Level | Max 14.9 dB(A) at 5000 RPM; adjustable to 3700 RPM for near-silent operation. | Local fans often range from 20-35 dB(A) at similar speeds, with less control over noise levels. |
| Performance & Reliability | Award-winning A-series design, >150,000h MTTF, 6-year warranty. | Local alternatives typically offer lower MTTF (e.g., 30,000-50,000 hours) and shorter warranties (1-2 years). |
| Customization & Accessories | Includes Low-Noise Adaptors for 3 speed settings, OmniJoin adaptor set, anti-vibration mounts. | Basic local fans usually include only screws, lacking speed control options or specialized adaptors. |
| Size & Application | Optimized 40x20mm size for 1U servers, network gear, NAS. | Local 40mm fans may be thicker (e.g., 30mm) or lack the specific design for compact, high-airflow applications. |
| SKU | ycs4314 |
| GTIN | 0841500110116 |
| Brand | Noctua |
| Model Number | NF-A4x20 FLX |
| Size | 40x40x20 mm |
| Color | Brown |
| Material | Fibre-glass reinforced PBT |
| Voltage | 12V |
| Power Connector | 3-Pin |
| Max Speed | 5000 RPM (with LNA) |
| Max Airflow | 9.4 m³/h (25.6 CFM) |
| Max Noise Level | 14.9 dB(A) (with LNA) |
| MTTF | >150,000 hours |
| Warranty | 6-year manufacturer’s warranty |
| Country of Origin | Not stated by manufacturer — US retail version, sourced from authorized US retailers and authorized brand partners |
About Noctua
Noctua is renowned for high-performance, premium quality PC cooling components, focusing on quiet operation and long-term reliability.
Compliance & Legal
No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging.
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This item:
Noctua NF-A4x20 FLX 40mm Fan | 40x20mm, 12V, 3-Pin, 5000 RPM, 14.9 dB(A), 9.4 m³/h Airflow
3,091
This item
Noctua NF-A4x20 FLX 40mm Fan | 40x20mm, 12V, 3-Pin, 5000 RPM, 14.9 dB(A), 9.4 m³/h Airflow
3,091
Total price:
9,695
You save 4,109 (30%) Extra3 items selected
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9,695You save 4,109 (30%) Extra
| Attributes | Current |  |  | ||||
|---|---|---|---|---|---|---|---|
| Spec | |||||||
| Price | 3,091 4,643 | 3,672 4,901 | 2,932 4,260 | 3,110 4,877 | 2,258 3,271 | 1,435 2,039 | 1,541 1,630 |
| Rating | 4.88(8) | 4.88(8) | 4.70(5,903) | 4.80(2,067) | 4.88(8) | 4.40(247) | 4.30(1,504) |
| Brand Name | Noctua | AC Infinity | AC Infinity | Noctua | Thermalright | TYHJ | Saipomor |
| Source | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail |
| Sold By | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow |
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