EN
FB3G133-24PL-70
| Nominal Voltage | VDC | 24 |
| Current draw | A | 1.2 |
| Speed(RPM) | min-1 | 3800 |
| Power consumption | W | 28 |
| Max. Air Flow | CFM / m3 /H | 235/400 |
| Max. Static Pressure | In.wg /Pa | 1.316/329 |
50pcs
The FB3G133-24PL-70 is an ultra-low-power 24VDC backward curved centrifugal fan engineered for battery-backed, solar-powered, and mobile applications where safety and energy efficiency are paramount. Its BLDC72 brushless motor consumes just 28W at 1.2A while delivering 400 m³/h (235 CFM) at 329 Pa—achieving class-leading efficiency in a compact 133mm form factor. At only 63 dB(A), it operates quieter than normal conversation, making it ideal for medical equipment, laboratory ventilation, and occupied spaces. The safe low-voltage 24VDC operation eliminates high-voltage wiring permits and shock hazards. 0-10VDC/PWM speed control with FG tach (2 pulse/rev). CE, RoHS, ISO9001, ErP2026 certified with 50,000-hour L10 bearing life.
The FB3G133-24PL-70 features a BLDC72 permanent magnet brushless external rotor motor optimized for low-voltage 24VDC operation. Drawing just 1.2A to produce 28W, it drives the 7-blade glass-fiber reinforced PP impeller at 3800 RPM to generate 400 m³/h at 329 Pa. The wide 16~28 VDC input accommodates battery charge/discharge voltage swings, making it ideal for lead-acid battery banks (21-28V range) and regulated 24V supplies. The die-cast aluminum housing provides IP44 protection. Ball bearings support any-angle mounting with 50,000+ hour L10 service life at 40°C. Protection suite: soft-start, current limitation, under/over voltage, thermal overload, locked-rotor, reverse polarity. FG tach (2 pulse/rev). CE, RoHS, ISO9001, ErP2026 and EN ISO 12100, EN 60204-1, EMC compliant.
| DC Backward Centrifugal Fan |  |
|
| Type | FB3G133-24PL-70 | |
| Model | BLDC72 | |
| Nominal Voltage | VDC | 24 |
| Voltage range | VDC | 16~28 |
| Current draw | A | 1.2 |
| Speed(RPM) | min-1 | 3800 |
| Power consumption | W | 28 |
| Sound Pressure Level | dB(A) | 63 |
| Max. Air Flow | CFM / m3 /H | 235/400 |
| Max. Static Pressure | In.wg /Pa | 1.316/329 |
| Insulation class | ~ | Class B |
| Degree of protection | ~ | IP44 |
| Control Input | ~ | 0~10VDC / PWM |
| Signal Output | ~ | FG (Tach output ) |
Remarks:
I. Standard cable length. The length of cable can be customized.
II. Conventional mode is 0-10V/PWM control. Modbus RTU over RS485 is available as an option.
Test condition:
I. The test data is obtained under the specified environment conditions and installation mode.
II. Input Voltage---Operating voltage.
III. Temperature---Room temperature 25°C.
IV. Humidity---65%RH.
I. When taking out the fan, do not directly lift the fan lead wire. If the lead wire is excessively stressed, the internal welding part may fall off
II. Do not plug or unplug the fan lead plug when the fan is running
III. If the fan does not work after starting, do not touch the impeller, rotor, or other parts, professional technical personnel are required to inspect the fan to prevent sudden start of the fan from causing hand or other personal injury
IV. Because of the soft start characteristics of the fan, to prevent personal injury, do not touch the impeller or other parts of the fan during powered on or running at low speeds
V. The fan needs to be operated and used under the guidance of professional personnel to prevent children from coming into touch this product
VI. If the power line is worn or damaged, it needs to be returned to the manufacturer for repair or be replaced under the guidance of the manufacturer
VII. As a part of the fan, it is not recommended to use the motor alone when there is no impeller or loading
1. 24V Low-Voltage Safety: Operating on safe 24VDC, the FB3G133-24PL-70 eliminates high-voltage wiring permits and electrical shock hazards. The 16~28 VDC input range accommodates lead-acid battery banks during charging (21-28V) and regulated 24V supplies alike. Ideal for medical equipment, mobile installations, marine DC systems, and solar-powered ventilation where personnel safety is non-negotiable.
2. Ultra-Efficient 28W: Delivering 400 m³/h at only 28W, the FB3G133-24PL-70 maximizes runtime on battery and solar systems. Drawing just 1.2A from a 24V supply, every watt is converted into useful airflow with over 80% motor efficiency—compared to 40-60% for equivalent DC brushed or AC shaded-pole fans. Ideal for off-grid, remote monitoring, and portable equipment.
3. Ultra-Quiet 63dB: At just 63 dB(A)—quieter than normal conversation—the FB3G133-24PL-70 is engineered for noise-sensitive environments: medical wards, laboratories, libraries, and premium residential ventilation where acoustic comfort directly impacts occupant well-being.
4. Comprehensive Protection: Soft-start, current limitation, under/over voltage detection (16~28 VDC), thermal overload for motor and electronics, locked-rotor, and reverse polarity protection ensure reliable unattended operation. FG tach (2 pulse/rev) enables real-time speed monitoring.
5. Certified & Flexible: CE, RoHS, ISO9001, ErP2026 with EN ISO 12100, EN 60204-1, EMC compliance. Die-cast aluminum housing, IP44, ball bearings rated 50,000+ hours L10. OEM/ODM with custom voltage, connectors, cable lengths. 7-day samples, 14-21 day production.
Q1:What kind of payments do you support?
A1: For sample order, 100% payment in advance; For batch order, 30% in advance and 70% will be paid before shipping
Q2:Will you provide samples?
A2: Sample is available and can be delivered within 7 days for standard models
Q3:How can I choose a more suitable model?
A3: We need the information like fan type, quantity, size, material, voltage, air flow and static pressure.
Q4:How can I place the order?
A4: Usually quote you within 24 hours after we get your inquiry. First sign the PI, pay deposit, then we will arrange the production. After finished production need you pay balance. Finally we will ship the Goods.
Q5:About transportation
A5: All available shipping ways could be applied, express shipping, air or sea. Appointed shipping company or our own forwarders all could be used in shipment. Full-way tracking the cargos for you before the goods arrive.
Q6:How long is the warranty period?
A6: We currently offer 3-year quality guarantee for our own products, and in response to current product problems, our company provides line support, and some customers have been able to improve their products.
