Description
ebm-papst 4112N/2H3 (also known as 4112N2H3) is a high-performance 12VDC compact brushless tubeaxial fan measuring 119 × 119 × 38 mm (4.69 × 4.69 × 1.50 in). Driven by an electronically commutated motor, it delivers an airflow rate of 182.4 CFM (310.0 m³/h) and an impressive maximum static back pressure of 1.405 in H₂O (350 Pa) at a nominal speed of 6,000 RPM. Built with a rugged die-cast metal housing, reinforced plastic impeller, and maintenance-free dual ball bearings, this model delivers reliable thermal relief across challenging continuous-duty industrial environments. Electrical termination is provided via 310 mm AWG 22 lead wires incorporating an open-collector tachometer speed signal, locked-rotor auto-restart, and reverse polarity protection.
Key Features
- Heavy-Duty Metal Construction: Die-cast metal housing paired with a fiberglass-reinforced plastic impeller provides superior structural rigidity and heat dissipation.
- High-Static Aerodynamics: Generates up to 350 Pa (1.405 in H₂O) static pressure, overcoming dense component impedance effectively.
- Precision Speed Monitoring: Integrated open-collector tachometer circuit outputs two pulses per revolution for real-time rotational monitoring.
- Comprehensive Circuit Protection: Features automated locked-rotor restart cycles, reverse polarity rectifying diode, and internal fast-acting Littelfuse protection.
- Extended Service Life: Precision ball bearings deliver a continuous operating L10 life expectancy of 65,000 hours at 40°C.
Technical Specifications
| Manufacturer | ebm-papst |
|---|---|
| Manufacturer Part Number (MPN) | 4112N/2H3 |
| Alternate Part Number | 4112N2H3 |
| Product Series | 4100N |
| Product Category | DC Axial Fans |
| Fan / Component Type | Brushless DC Tubeaxial Cooling Fan |
| Supply Type | DC |
| Rated Voltage | 12 VDC |
| Operating Voltage Range | 9.0 to 15.0 VDC |
| Nominal Power Consumption | 22.0 W (±15%) |
| Power Consumption at 9 VDC | 12.4 W (±15%) |
| Power Consumption at 15 VDC | 22.5 W (±15%) |
| Nominal Current Draw | 1.800 A (1,800 mA, ±15%) |
| Current Draw at 9 VDC | 1.400 A (1,400 mA, ±15%) |
| Current Draw at 15 VDC | 1.500 A (1,500 mA, ±15%) |
| Locked Rotor Current | 4.200 A (4,200 mA approx.) |
| Max. Residual Current at UN | ≤ 10 mA |
| Speed (RPM) | 6,000 RPM (±10%) |
| Speed at 9 VDC | 4,900 RPM (±10%) |
| Airflow | 182.4 CFM (310.0 m³/h) |
| Airflow at Optimal Operating Point | 141.3 CFM (240.0 m³/h @ 107 Pa) |
| Static Pressure (Max.) | 1.405 in H₂O (350 Pa) |
| Static Pressure at Optimal Point | 0.430 in H₂O (107 Pa) |
| Sound Pressure Level (Free Air) | 64.0 dB(A) |
| Sound Power Level (Optimal Point) | 7.1 Bel(A) |
| Airflow Direction | Air intake over struts |
| Direction of Rotation | Clockwise (looking at rotor) |
| Dimensions (L × H × D) | 119.0 × 119.0 × 38.0 mm (4.69 × 4.69 × 1.50 in) |
| Mounting Screw Size | ISO 4762 – M4 degreased |
| Max. Tightening Torque (Wire Corner) | 420 N·cm (37.2 in·lb) |
| Housing Material | Die-cast Metal |
| Impeller Material | Fiberglass-Reinforced Plastic |
| Bearing Type | Ball Bearing |
| Installation / Mounting Position | Any (horizontal or vertical shaft) |
| Weight | 0.390 kg (0.860 lbs) |
| Termination & Cable Specs | 3 Lead Wires, AWG 22, TR 64, stripped ends |
| Cable Length | 310 mm ± 10 mm (12.20 in ± 0.39 in) |
| Wire Insulation Outer Diameter | 1.7 mm |
| Wiring Pinout / Designations | Pin 1: Red (+UB), Pin 2: Blue (-GND), Pin 3: White (Tachometer /2 Open Collector) |
| Tachometer Output Signal | /2 Open Collector (2 pulses per revolution, (2 × n)/60) |
| Tacho Operating Voltage Range | 4 to 30 VDC |
| Tacho Low Signal Level | ≤ 0.4 V (at Isink = 2 mA) |
| Tacho High Signal Level | 30 V (at Isource = 0 mA) |
| Max. Tacho Sink Current | ≤ 10 mA |
| Tacho Slew Rate | ≥ 0.5 V/µs |
| Motor Protection | Auto-restart locked-rotor protection, reverse polarity protection |
| Locked Rotor Restart Cycle | t3 / t4 typical: 1.2 s / 5.0 s |
| Internal Overcurrent Fuse | Littelfuse NANO2® Very Fast-Acting 451 Series, 5 A (Art. 451005) |
| Dielectric Strength (Type Test) | 500 VAC / 1 min (after 48h at 95% RH, 25°C) |
| Insulation Resistance | RI > 10 MΩ (at 500 VDC for 1 min) |
| Clearance / Creepage Distance | 1.0 mm / 1.2 mm |
| Electrical Protection Class | Class III |
| Operating Temperature Range | -20 to +65 °C (-4 to +149 °F) |
| Storage Temperature Range | -40 to +80 °C (-40 to +176 °F) |
| Climatic Resistance | Humid heat constant per DIN EN 60068-2-78 (14 days), Pollution Degree 1 |
| Service Life (L10 at 40 °C) | 65,000 Hours |
| Standards & Certifications | CE, EAC, UL 507, CSA C22.2 No. 113, VDE EN 60950, RoHS3 Compliant |
Applications
ebm-papst 4112N/2H3 compact axial fans are engineered for deployment in high-density telecommunication rectifiers, industrial automation inverter drives, and automated test equipment. The metal-housed assembly serves as a critical cooling element inside enclosed server chassis, medical imaging instrumentation, and modular power conversion systems. Maintenance engineers and system integrators routinely select this fan for replacement and integration in challenging factory floor control cabinets and high-backpressure electronic enclosures.
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