NF-A4x20 FLX
High-efficiency quiet 40x20mm fan
Compact 40x20mm size
Ideal for 1U applications or replacing noisy 4cm fans
Quiet cooling performance
Outstanding airflow and pressure at minimum noise levels
3-pin FLX version
Provides 5000/4400/3700rpm speed settings via Low-Noise Adaptors
Key specifications
Size (Form factor) | 40 x 40 x 20 mm |
Speed range | 0 – 5000 rpm |
Airflow (max.) | 9.4 m³/h (5.53 CFM) |
Acoustical noise (max.) | 14.9 dB(A) |
Static pressure (max.) | 2.26 mm H₂O |
Rated voltage | 12 V |
Input power (typical) | 0.46 W |
Connector | 3-pin |
Colour | Brown |
Warranty | 6 years |
Scope of delivery
- NA-RC10 Low-Noise Adaptor (L.N.A.)
- NA-RC12 Ultra-Low-Noise Adaptor (U.L.N.A)
- NA-EC2 30cm extension cable
- OmniJoin™ adaptor set
- 4x NA-AV3 anti-vibration mounts
- Fan screws
Extended specifications
Mechanical specifications
Dimensions without anti-vibration pads | 40 x 40 x 20 mm |
Dimensions with anti-vibration pads | 40 x 40 x 22 mm |
Mounting hole spacing(s) | 32 x 32 mm |
Weight | 20 g |
Material frame | PBT GF30 |
Material impeller | PP GF30 |
Material anti-vibration pads | Silicone rubber |
Bearing | SSO2 |
Rotational direction | Counter-clockwise |
Frame colour | Beige |
Impeller colour | Brown |
Anti-vibration pads colour | Brown |
Connector type | A2543-3PIN (or equal) |
Cable length | 200 mm |
Cable length with extension cable (included) | 500 mm |
Wire | 26 AWG |
Sleeving | Fibreglass silicone mesh |
Included adaptors | OmniJoin™ |
Performance specifications
Rotational speed (max.) | 5000 rpm |
Rotational speed with LNA (max.) | 4400 rpm |
Rotational speed with ULNA (max.) | 3700 rpm |
Acoustical noise (max.) | 14.9 dB(A) |
Acoustical noise with LNA (max.) | 12.2 dB(A) |
Acoustical noise with ULNA (max.) | 8.5 dB(A) |
Airflow (max.) | 9.4 m³/h (5.53 CFM) |
Airflow with LNA (max.) | 8.3 m³/h (4.89 CFM) |
Airflow with ULNA (max.) | 6.9 m³/h (4.06 CFM) |
Static pressure (max.) | 2.26 mm H₂O |
Static pressure with LNA (max.) | 1.75 mm H₂O |
Static pressure with ULNA (max.) | 1.23 mm H₂O |
Electrical specifications
Motor type (phases) | Single phase |
Poles | 4 |
Slots | 4 |
Rated voltage | 12 V |
Starting voltage | 8 V |
Max. operating voltage | 13.2 V |
Pin configuration |  |
Pin 1 | Black: Ground (GND) |
Pin 2 | Red: Voltage (Vcc) |
Pin 3 | Yellow: RPM Signal |
Input power (max) | 0.6 W |
Input power (typical) | 0.46 W |
Input current (max) | 0.05 A |
Input current (typical) | 0.04 A |
Safety, compliance & environmental specifications
Safety standards | EN62368-1 |
EMC standards | EN55032, EN55035 |
UL | |
CE | |
UKCA | |
Production Standards | ISO 9001 & ISO 14001 |
Flammability | UL 94 V-0 |
REACH | |
RoHS | |
CMRT | |
EMRT | |
Ingress protection | IP50 |
Operating temperature | -10°C to +70°C |
Operating humidity | 15 – 90 % |
Storage temperature | -20°C to +75°C |
Storage humidity | 15 – 90 % |
MTTF | > 150,000 h |
Locked rotor protection | Auto power off after locked at rated voltage for 1 sec. After auto power off, the circuit attempts to restart in 2 to 6 sec. |
Polarity protection | Open circuit when Vcc & GND are exchanged. Circuit won't be burned within 5 sec when Vcc & GND are exchanged. |
Over voltage protection | |
Over current protection | |
Insulation resistance | 10 MΩ / between unshielded wire and frame at 500 VDC/min |
Dielectric strength | 5 mA max. / measured between lead wire (+) and frame at 500 VAC/min |
Logistical specifications
Packaging dimensions | 210 x 150 x 34 mm |
Packaging weight (including product) | 180 g |
EAN | 9010018100112 |
UPC | 841500110116 |
Packaging unit | 40 pcs |
Packaging unit dimensions | 395 x 380 x 380 mm |
Packaging unit weight | 9 kg |