Description
The ebm-papst 8412N/2GHP (also known as 8412N2GHP) is an industrial-grade compact DC axial cooling fan engineered in a standardized 80 × 80 × 25.4 mm (3.15 × 3.15 × 1.00 in) plastic housing with an integrated sleeve bearing system. Operating from a nominal 12 VDC supply (10.8 to 13.2 VDC range), it draws 3.0 W at full speed to deliver up to 45.9 CFM (78.0 m³/h) of free-air volume and a maximum static pressure of 0.233 in H₂O (58 Pa). Aerodynamically optimized with counterclockwise rotation over the housing struts, this brushless 4-wire fan provides precision dynamic speed control via 25 kHz PWM input alongside an open-collector tachometer speed feedback signal. Built with reverse polarity protection and locked-rotor automatic restart, it offers high operational reliability across demanding electronic thermal management installations.
Key Features
- PWM Dynamic Control: Wide 20% to 100% duty cycle speed adjustment with integrated low-power shutdown below 1% duty.
- Open-Collector Tachometer: Generates two pulses per revolution for accurate, real-time motor speed monitoring up to 28 VDC.
- Reinforced Plastic Construction: Durable lightweight housing and impeller assembly rated for versatile mounting orientations across machinery panels.
- Locked-Rotor Auto-Restart: Microcontrolled cyclic restart circuit protects internal motor electronics against thermal damage during mechanical stalling.
- Compact 80mm Form Factor: Industry-standard envelope simplifies direct drop-in replacement across legacy enclosures and modern control assemblies.
Technical Specifications
| Manufacturer | ebm-papst |
|---|---|
| Manufacturer Part Number (MPN) | 8412N/2GHP |
| Alternate Part Number | 8412N2GHP |
| Product Series | 8400 N Series |
| Product Category | DC Axial Fans |
| Fan / Component Type | Tubeaxial Fan |
| Phase & Supply Type | DC |
| Rated Voltage | 12 VDC |
| Operating Voltage Range | 10.8 to 13.2 VDC |
| Speed (RPM) | 3,600 RPM (100% PWM) / 1,950 RPM (50% PWM) |
| Speed Tolerance | ±7.5% (Nominal Voltage, 100% PWM) |
| Power Rating | 3.0 W |
| Max. Power Consumption | 3.7 W (at 13.2 VDC, 100% PWM) |
| Power Consumption at 50% PWM | 0.9 W (at 12 VDC) |
| Rated Current | 250 mA |
| Max. Current Draw | 280 mA (at 13.2 VDC) |
| Starting Current | 335 mA |
| Current Consumption at 50% PWM | 75 mA (at 12 VDC) |
| Airflow | 45.9 CFM (78.0 m³/h) |
| Static Pressure | 0.233 in H₂O (58 Pa) |
| Optimal Operating Airflow | 37.7 CFM (64.0 m³/h) |
| Optimal Operating Pressure | 0.056 in H₂O (14 Pa) |
| Noise Level (Sound Pressure) | 37.0 dB(A) |
| Sound Power Level | 5.0 Bel(A) |
| Airflow Direction | Air outlet over struts |
| Direction of Rotation | Counterclockwise (looking at rotor) |
| Dimensions (L × H × D) | 80.0 × 80.0 × 25.4 mm (3.15 × 3.15 × 1.00 in) |
| Mounting Hole Pitch | 71.5 ± 0.2 mm (2.81 in) |
| Housing Material | Plastic |
| Impeller Material | Plastic |
| Bearing Type | Sleeve bearing |
| Axial Clearance | 0.1 to 0.9 mm (Gleitlagerung / Sleeve Bearing) |
| Installation Position | Any |
| Weight | 0.095 kg (0.209 lbs) |
| Max. Mounting Screw Torque | 50 N·cm (wire corner) / 70 N·cm (other corners) |
| Mounting Screw Size | ISO 4762 – M4 degreased (without washer) |
| Termination & Cable Specs | 4 lead wires, 26 AWG, insulation Ø 1.35 mm, length 310 ± 10 mm (12.2 in) |
| Wiring Pinout / Connection | Red: +UB, Blue: -GND, Violet: PWM Control, White: Tach Output |
| Control / Signal Features | PWM Speed Control, Open-Collector Tachometer Output (/2) |
| PWM Control Frequency | 21 kHz to 28 kHz (Typical: 25 kHz) |
| PWM Logic Voltage | Low <= 0.8 V, High Open Circuit 5.25 V |
| PWM Duty Cycle Range | 20% to 100% (Startup: > 25%, Shutdown: < 1%) |
| Tachometer Operating Voltage | Up to 28 VDC (External pull-up required) |
| Tachometer Max Sink Current | <= 4 mA |
| Tachometer Frequency Output | 2 pulses per revolution (120 Hz at 3,600 RPM) |
| Motor Protection | Locked-rotor auto restart, Reverse polarity protection |
| Locked Rotor Current | approx. 335 mA |
| Locked Rotor Cycle Time | Typical t3/t4: 0.27 s run / 1.2 s hold |
| Insulation Resistance | RI > 10 MΩ (at 500 VDC for 1 min) |
| Clearance & Creepage Distances | 1.0 mm / 1.2 mm |
| Electrical Protection Class | Class III |
| Operating Temperature | 0 to +70 °C (32 to +158 °F) |
| Storage Temperature | -40 to +80 °C (-40 to +176 °F) |
| Service Life (L10 at 40°C) | 70,000 hours |
| Standards & Compliance | CE, UL 507, VDE EN 60950, RoHS3 Compliant |
Applications
The ebm-papst 8412N/2GHP axial cooling fan provides targeted forced-air thermal management for medium-density telecommunications rectifiers, optical network terminals, and industrial embedded computing units. It is extensively installed in variable frequency drive (VFD) power card bays, PLC rack controllers, and instrumentation enclosures to maintain stable operating temperatures around heat-sensitive microprocessors. OEM engineers also integrate this fan into medical diagnostic laboratory equipment, robotics power packs, and uninterruptible power supply (UPS) inverter systems requiring quiet, closed-loop speed-monitored dissipation.
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