Description
ebm-papst 4118N/2H4 (also known as 4118N2H4) is a high-performance 48 VDC brushless tubeaxial cooling fan measuring 119 x 119 x 38 mm (4.69 x 4.69 x 1.50 in), engineered with a rugged metal housing and glass-fiber reinforced plastic impeller. Operating across a wide 36 to 60 VDC input range, it delivers a nominal airflow of 206.0 CFM (350.0 m³/h) and an impressive maximum static pressure of 1.606 in H₂O (400 Pa) at 6,800 RPM. The unit integrates dual precision ball bearings, electronic locked-rotor auto-restart protection, reverse polarity protection, and a factory-calibrated open-collector tachometer speed monitoring output. Wired via three 310 mm AWG 22 leads, this industrial fan is purpose-built for continuous duty in demanding thermal dissipation applications.
Key Features
- High-Pressure Aerodynamics: Delivers up to 206.0 CFM (350.0 m³/h) airflow and 400 Pa static pressure at 6,800 RPM speed.
- Heavy-Duty Metal Construction: Combines a die-cast metal housing with reinforced plastic impeller for structural rigidity in demanding industrial environments.
- Integrated Tachometer Output: Features an open-collector speed sensor generating two pulses per revolution for real-time RPM monitoring and diagnostics.
- Advanced Motor Protection: Incorporates reverse polarity protection and locked-rotor auto-restart circuitry to prevent thermal overload and damage.
- Precision Ball Bearings: Employs a maintenance-free dual ball bearing assembly supporting any mounting orientation with 62,500 hours service life.
Technical Specifications
| Manufacturer | ebm-papst |
|---|---|
| Manufacturer Part Number (MPN) | 4118N/2H4 |
| Alternate Part Number | 4118N2H4 |
| Product Series | 4100N (S-Force) |
| Product Category | DC Axial Fans |
| Fan / Component Type | Tubeaxial Fan |
| Supply Type | DC |
| Rated Voltage | 48 VDC |
| Operating Voltage Range | 36.0 to 60.0 VDC |
| Speed (RPM) | 6,800 RPM |
| Speed at Min. Voltage (36 VDC) | 5,650 RPM |
| Power Consumption (Nominal) | 28.0 W |
| Power Consumption at 36 VDC | 18.0 W |
| Power Consumption at 60 VDC | 30.0 W |
| Current Consumption (Nominal) | 580 mA (0.58 A) |
| Current Consumption at 36 VDC | 500 mA (0.50 A) |
| Current Consumption at 60 VDC | 500 mA (0.50 A) |
| Starting Current Consumption | 1,700 mA (1.70 A) |
| Locked Rotor Current | Approx. 1,700 mA (1.70 A) |
| Airflow | 206.0 CFM (350.0 m³/h) |
| Max. Static Pressure | 1.606 in H₂O (400 Pa) |
| Optimum Operating Airflow | 147.1 CFM (250.0 m³/h) |
| Optimum Operating Back Pressure | 0.562 in H₂O (140 Pa) |
| Sound Pressure Level | 67.0 dB(A) (at 1 m free air) |
| Sound Power Level | 7.4 Bel(A) (at optimum operating point) |
| Direction of Rotation | Clockwise (looking at rotor) |
| Airflow Direction | Air intake over struts |
| Dimensions (L × H × D) | 119.0 × 119.0 × 38.0 mm (4.69 × 4.69 × 1.50 in) |
| Housing Material | Metal |
| Impeller Material | Plastic (Glass-Fiber Reinforced) |
| Bearing Type | Dual Ball Bearing |
| Mounting Position | Any (horizontal or vertical shaft) |
| Max. Mounting Torque (Wire Outlet Corner) | 420 N·cm (37.2 in·lbs) |
| Mounting Screw Specification | ISO 4762 – M4 |
| Weight | 0.390 kg (0.860 lbs) |
| Termination & Cable Specs | 3 Lead Wires, AWG 22, Length: 310 mm (12.2 in) ±10 mm |
| Lead Wire Insulation Diameter | 1.7 mm |
| Wiring Pinout / Connection | Red = +UB (+48 VDC), Blue = -GND (0 VDC), White = Tacho Output |
| Tachometer Output Type | /2 Open Collector (2 pulses per revolution) |
| Tachometer Max. Operating Voltage | 60 VDC |
| Tachometer Max. Sink Current | 10 mA (Isink <= 10 mA) |
| Tachometer Signal Low Level | <= 0.4 V (at Isink = 2 mA) |
| Tachometer Frequency Formula | (2 × n) / 60 |
| Motor Electronic Function | Speed-Controlled |
| Reverse Polarity Protection | Rectifying diode (IF <= 10 mA at UN) |
| Locked Rotor Protection | Auto restart (clock cycle t3/t4 typical: 1.0 s / 5.5 s) |
| Electrical Protection Class | Class III |
| Dielectric Strength (Type Test) | 500 VAC / 1 min (after 48h at 95% R.H. & 25°C) |
| Insulation Resistance | RI > 10 MΩ (at 500 VDC) |
| Clearance / Creepage Distance | 1.0 mm / 1.5 mm |
| Operating Temperature | -20 °C to +65 °C (-4 °F to +149 °F) |
| Storage Temperature | -40 °C to +80 °C (-40 °F to +176 °F) |
| Climatic / Humidity Resistance | Humid heat constant per DIN EN 60068-2-78, 14 days |
| Pollution Degree | Pollution Degree 1 (DIN EN 60664-1) |
| Service Life (L10 at 40 °C) | 62,500 Hours |
| Standards & Approvals | CE, EAC, UL (UL507), VDE (EN 60950), CSA (C22.2 No. 113), CCC (GB 12350), RoHS3 |
Applications
ebm-papst 4118N/2H4 is engineered for high-density thermal management in telecom cell-site shelters, optical transport racks, and enterprise switching equipment requiring sustained forced-air cooling across tightly spaced boards. The compact axial fan provides critical cabinet ventilation in industrial variable frequency drives, robotic motion controllers, and solar inverter modules operating under continuous duty. Additionally, it serves as a reliable replacement cooling component in rackmount server chassis, laboratory diagnostic equipment, and automated test instrumentation.
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