Description
The ebm-papst RER125-19/12N (also known as RER1251912N) is an unhoused backward-curved DC motorized centrifugal compact fan measuring Ø 138 x 35 mm (Ø 5.43 x 1.38 in). Operating on a nominal 12 VDC supply across an extended 7 to 15 VDC input range, it delivers 64.7 CFM (110 m³/h) of high-pressure airflow at 2650 RPM while consuming just 4.6 W. Built with a rugged glass-fiber reinforced plastic impeller, premium ball bearings, and axial-intake radial-discharge aerodynamics, the unit features electronic locked-rotor and reverse-polarity protection via 400 mm AWG 22 leads.
Key Features
- Aerodynamic Impeller: Backward-curved fiberglass-reinforced plastic blades optimize high-pressure efficiency with radial discharge.
- Dual Ball Bearings: Robust maintenance-free bearing system guarantees up to 62,500 hours L10 service life.
- Broad Input Range: Operates smoothly across 7 to 15 VDC with low 4.6 W power draw.
- Integrated Motor Protection: Built-in electronics prevent damage from reversed polarity, blocked rotors, and electrical overload.
- Industrial Compliance: Fully certified to UL, CSA, VDE, and CE standards for global OEM deployment.
Technical Specifications
| Manufacturer | ebm-papst |
|---|---|
| Manufacturer Part Number (MPN) | RER125-19/12N |
| Alternate Part Number | RER1251912N |
| Product Series | RER 125 N |
| Product Category | DC Centrifugal Fans |
| Fan / Component Type | Motorized Impeller (Unhoused Backward-Curved) |
| Supply Type | DC |
| Rated Voltage | 12 VDC |
| Operating Voltage Range | 7.0 to 15.0 VDC |
| Speed (RPM) | 2650 RPM |
| Power Consumption | 4.6 W |
| Airflow | 64.7 CFM (110.0 m³/h) |
| Sound Power Level | 5.7 Bel |
| Sound Pressure Level | 47.0 dB(A) |
| Airflow Direction | Axial intake, radial discharge |
| Direction of Rotation | Clockwise, viewed toward rotor |
| Dimensions | Ø 138 x 35 mm (Ø 5.43 x 1.38 in) |
| Impeller Material | Glass-fiber reinforced plastic |
| Bearing Type | Ball bearing |
| Mounting Features | 2x M4 tapped holes (5 mm depth, Ø 56 / Ø 47 mm bolt circle) |
| Weight | 0.320 kg (0.705 lbs) |
| Termination & Cable Specs | 2 wire leads, AWG 22, TR 64, Length: 400 mm (+10 mm) / 15.75 in |
| Motor Protection | Electronic locked-rotor and overload protection, reverse polarity protection |
| Operating Temperature | -30 °C to +75 °C (-22 °F to +167 °F) |
| Service Life (L10 at 40 °C) | 62,500 hours |
| Standards & Compliance | VDE, CSA, UL, CE, RoHS |
Applications
The ebm-papst RER125-19/12N motorized impeller is engineered for forced air cooling across high-backpressure electronics enclosures, 19-inch telecom chassis, and embedded computing systems. Its flat profile and radial discharge suit space-constrained heat exchanger plenums, medical diagnostic instrumentation, and industrial power supplies requiring concentrated thermal dissipation. Maintenance personnel and OEM designers deploy this centrifugal fan in automation control cabinets and precision laboratory machinery to ensure dependable, continuous thermal control.
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