Description
The ebm-papst R1G175-AF29-04 (also known as R1G175AF2904) is an unhoused backward-curved EC motorized centrifugal impeller powered by an integrated M1G055-CF brushless DC motor, measuring Ø175 mm × 69 mm (Ø6.89 in × 2.72 in). Engineered for high-aerodynamic-efficiency forced convection, it operates across a wide 36 to 52 VDC input range (48 VDC nominal) to deliver 4000 RPM at 75 W with a quiet 72.0 dB(A) acoustic profile. The assembly is built with a glass-fiber reinforced PA66 composite impeller and a die-cast aluminum electronics housing with black-painted rotor finish for resilient heat dissipation. Dual precision ball bearings, IP22 environmental sealing, soft start, and integrated locked-rotor/reverse polarity protection ensure continuous S1 operation via 4-wire PWM/0–10V speed command and tachometer feedback.
Key Features
- Brushless EC Motor Efficiency: Driven by an integrated M1G055-CF motor consuming 75 W at 4000 RPM across a flexible 36–52 VDC range.
- Advanced Control Interface: Features linear 0–10 VDC / PWM speed control input alongside an open-collector tachometer pulse output.
- Aerodynamic Impeller Design: Engineered with single-intake backward-curved PA66 glass-reinforced blades delivering high static pressure without scroll housing.
- Heavy-Duty Mechanical Build: Combines a die-cast aluminum electronics housing, dual ball bearings, and black-coated external rotor for S1 duty.
- Comprehensive Motor Protection: Integrated circuitry provides locked-rotor protection, reverse polarity defense, active current limiting, and soft starting.
Technical Specifications
| Manufacturer | ebm-papst |
|---|---|
| Manufacturer Part Number (MPN) | R1G175-AF29-04 |
| Alternate Part Number | R1G175AF2904 |
| Integrated Motor Model | M1G055-CF |
| Product Series | R1G175 |
| Product Category | EC Centrifugal Fans |
| Fan / Component Type | Motorized Impeller (Unhoused Backward-Curved) |
| Supply Voltage Type | DC |
| Rated Voltage | 48 VDC |
| Operating Voltage Range | 36.0 to 52.0 VDC |
| Speed (RPM) | 4000 RPM |
| Method of Obtaining Data | Free air (fa) |
| Power Consumption | 75 W |
| Current Draw | 1.75 A |
| Noise Level | 72.0 dB(A) |
| Impeller Diameter | 175 mm (6.89 in) |
| Total Depth | 69.0 mm (2.72 in) |
| Impeller Material | PA66 plastic, glass-fiber reinforced |
| Electronics Housing Material | Die-cast aluminum |
| Rotor Surface | Painted black |
| Bearing Type | Dual Ball Bearing |
| Direction of Rotation | Clockwise, viewed toward rotor |
| Installation Position | Any |
| Cooling Openings | Rotor side |
| Operating Mode / Duty Cycle | Continuous (S1) |
| Weight | 1.0 kg (2.20 lbs) |
| Termination | 4 Wire Leads with Splice Terminals |
| Control Input | 0-10 VDC / PWM |
| Speed Monitoring | Tachometer (Speed Sensor) Output |
| Motor Protection | Reverse polarity, locked-rotor, active current limitation, and soft start |
| Electrical Protection Class | Class I (with customer protective earth connection) |
| Insulation Class | Class B |
| Ingress Protection (IP) | IP22 |
| Moisture / Environmental Class | H0 |
| Operating Temperature Range | -25 to +40 °C (-13 to +104 °F) |
| Storage / Transport Temperature Range | -40 to +80 °C (-40 to +176 °F) |
| EMC Immunity to Interference | According to EN 61000-6-2 (Industrial Environment) |
| EMC Interference Emission | According to EN 55022 (Class B) |
| Conformity with Standards | EN 60950-1 |
| Safety Approvals | CCC, EAC |
| Environmental Compliance | RoHS3 Compliant |
Applications
The ebm-papst R1G175-AF29-04 motorized centrifugal impeller provides targeted convective cooling and pressurization within high-density telecommunications base stations, modular DC power rectifiers, and server rack heat exchangers. Its unhoused backward-curved form factor is widely integrated into compact fan filter units (FFUs), railway electronic enclosures, and cleanroom air circulation systems where space constraints demand direct plenum discharge. It also serves as a high-reliability drop-in replacement for OEM precision air cooling modules across industrial automation cabinets and energy storage power conversion systems.
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