R3G250-RK55-05 ebmpapst 48VDC 250mm EC Centrifugal Fan

Description

The ebmpapst R3G250-RK55-05 is a high-efficiency RadiCal® EC centrifugal fan engineered for precision thermal management in DC-powered environments. Driven by the M3G055-CF external rotor motor with integrated control electronics, this 250 mm unit is optimized for 48 VDC operation, delivering a balanced 105 W of power at a rated speed of 2250 RPM. The specialized backward-curved impeller, crafted from glass-fiber reinforced plastic, provides superior aerodynamic efficiency and low noise emissions. This EC fan features integrated speed control via PWM or 0-10 VDC signals, allowing for dynamic airflow adjustment based on system cooling requirements. With its robust ball bearing system and IP54-rated motor protection, the R3G250-RK55-05 ensures reliable S1 continuous operation in telecommunications infrastructure, server racks, and industrial control systems where energy efficiency and compact integration are critical.

R3G250-RK55-05 Fan Parameters
Model Number: R3G250-RK55-05
Motor Number: M3G055-CF
Manufacturer: ebmpapst
Series: RadiCal® Series
Type: EC Centrifugal Fan (Backward-curved)
Size: 250 mm
Dimensions: 250 mm (Impeller diameter)
Weight: 1.6 kg
Bearing Type: Ball bearing
Nominal Voltage: 48 VDC
Voltage Range: 36.0 – 57.0 VDC
Power Consumption: 105 W
Nominal Current: 2.30 A
Speed: 2250 RPM
Max. Air Flow: 62.23 CFM (105.7 m³/h / 1.76 m³/min)
Max. Static Pressure: 9.81 mmH₂O (96.24 Pa / 0.39 inH₂O)
Actual Air Flow: 1180 m³/h
Actual Static Pressure: 380 Pa
Sound Power Level: 6.8 Bel(A)
Sound Pressure Level: 60 dB(A)
Motor Design: EC external rotor motor with integrated electronics
Motor Protection: Reverse polarity and locked-rotor protection; soft start
Technical Features: PWM / 0-10 VDC control input; Tacho output
Insulation Class: Class B
Electrical Hookup: Lead wires
Number of Blades: 7
Direction of Rotation: Clockwise, viewed toward rotor
Airflow Direction: Radial
Impeller Material: Glass-fiber reinforced PA plastic
Housing Material: None (Motorized impeller)
Installation Position: Any
Degree of Protection: IP54
Operating Temperature: -25 – +60 °C
Service Life (L10 @ 40 °C): 62500 h
Standard Compliance: EN 60950-1, CE
Approval Agency: VDE, UL, CSA, CCC

Application
The ebmpapst R3G250-RK55-05 EC fan is primarily utilized in telecommunications base stations, 48V DC server cabinets, industrial battery cooling, and energy-efficient ventilation modules.