Home / Products / Centrifugal Fans / Backward Centrifugal Fan With Support Bracket / EC 230V 133mm 37W Backward Centrifugal Fan Suitable for Silent Computer Host Fan

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EC 230V 133mm 37W Backward Centrifugal Fan Suitable for Silent Computer Host Fan

1. 133mm Diameter
2.37W
2. IP55 protection level
3. Aluminum alloy motor with Plastic with glass-fiber reinforced impeller, fashion design.
4. Using Ball bearing, working life more than 50,000 hours
Availability:
Quantity:
  • FK3G133-2APL-51

  • Fanova

Phase

~

1~

Nominal Voltage

VAC

230

Nominal voltage range

VAC

184~270

Frequency

Hz

50/60

Current draw

A

0.26±10%

Speed(RPM)

min-1

3900±5%

Power consumption

W

37±10%

Sound Pressure Level

dB(A)

62±5%

Max. Air Flow

CFM / m3/H

152.42/259

Max. Static Pressure

In.wg /Pa

1.73/433

Insulation class

~

Class B

Degree of protection

~

IP55

Control Input

~

0~10VDC / PWM

Signal Output

~

FG (Tach output )

Product Overview

The FB3G133-2APL-51 is an ultra-compact, energy-efficient EC centrifugal fan designed for low-power cooling in residential and commercial devices. With a lightweight plastic/fiberglass impeller and 230V single-phase operation, it delivers focused airflow (259 m³/h max) at minimal noise (62 dB(A)). Its IP44-rated housing and PWM/0–10VDC speed control make it ideal for applications where space, quietness, and precise thermal management are priorities.


Key Specifications

  1. Miniaturized High-Speed Design
    Features a 133mm impeller spinning at 3900 RPM for targeted airflow despite its compact footprint (total weight: 650g). Optimized for tight installations.

  2. Energy-Saving EC Motor
    Consumes just 37W at 230VAC (184–270V range). Soft-start technology and thermal protection ensure longevity (50,000 hours L10 at 40°C).

  3. Silent Operation
    Operates at 62 dB(A) – ideal for noise-sensitive environments like offices, clinics, or smart home devices.

  4. Plug-and-Play Control
    Includes +10VDC output for sensors, PWM/0–10VDC speed input, and tachometer signal (FG: 2 pulses/revolution) for real-time monitoring.


Applications

  • Electronics Cabinets: Cooling for routers, PoE switches, and control panels.

  • Home Appliances: Ventilation in wine coolers, projectors, or smart toilets.

  • Medical Devices: Airflow for portable diagnostic equipment.

  • Light Commercial HVAC: Small duct boosters or localized exhaust systems.


FAQ

Q1: Can it run on 110V power?
A: No. Designed for 230VAC single-phase. Use a transformer for 110V compatibility.

Q2: How quiet is 62 dB(A) in practice?
A: Comparable to background office noise—suitable for quiet spaces.

Q3: What’s the FG signal’s purpose?
A: Connect the white wire to monitor fan speed (2 pulses/revolution).

Q4: Is it waterproof?
A: IP44 rating protects against water splashes but not immersion.

Q5: Can cables be shortened?
A: Yes. Contact technical support for custom lengths.


FK3G133-2APL-51

FB3G133-2APL-51-PQ曲线+全-模型_00

Voltage OutputOutput +10VDC, max. 1.1 mA (Can be used as speed control input voltage or FG signal pull-up voltage,and need to be circumscribed in series with a pull -up resister, details as connection diagram.)
Dielectric Resistance10mA maximum at 1800VAC 50Hz one second Between frame and (+) terminal
Life Expectance50,000 Hours(L10)
Leakage Current≤3.5mA (Max. )
Direction of Air FlowStraight forward from air outlet
MotorExternal rotor EC motor
Technical featuresMotor current limitation
Soft starting Protection
Under/Over voltage detection
Thermal overload protection for electronics/motor
Line undervoltage detection
Locked-rotor Protection
Reverse Polarity Protection
Operating Temperature-25ºC (Min. )60ºC (Max. )
Heat sink of IC115ºC (Max. )
Other electronic parts85ºC (Max. )
Ball bering80ºC (Max. )
Lead Wire120ºC (Max. )
Storage Temperature-40ºC to 75ºC
Operating Humidity5% to 90% RH
Storage Humidity5% to 95% RH
Electronics housing materialDie-cast aluminum
Operation ModeS1
Motor bearingBall bearing
Valid For Approval/StandardCE,RoHS,ErP2015



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 +86-18168737096
 +8617715518438
 +8617715518438
 No.739, Fuyuan Road, Xiangcheng District, Suzhou, Jiangsu, P.R. China 215133

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+86-17715518438
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+8617715518438
+8617715518438
No.739, Fuyuan Road, Xiangcheng District, Suzhou, Jiangsu, P.R. China 215133
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