Description
The ebm-papst 3218J/2H4P (also known as 3218J2H4P) is an ultra-high-pressure 92x92x38 mm (3.62×3.62×1.50 in) compact DC axial fan engineered for dense electronic enclosure cooling. Operating on a nominal 48 VDC supply across a wide 20.0 to 58.0 VDC window, it delivers an aerodynamic output of 167.7 CFM (285.0 m³/h) and up to 800 Pa (3.21 in H₂O) maximum static pressure at 13,000 RPM. Constructed with durable fibreglass-reinforced plastic housing and impeller assemblies running on dual precision ball bearings, this unit features integrated open-collector PWM speed control and a dual-pulse frequency tachometer output. Robust protection architectures include locked-rotor auto-restart, reverse polarity protection via internal diode, and comprehensive international electrical safety certifications.
Key Features
- Aerodynamic Density: Achieves 167.7 CFM airflow and 800 Pa static pressure for densely packed server and telecommunication heat sinks.
- Dynamic Speed Regulation: Integrates open-collector PWM input supporting 1 kHz to 5 kHz frequencies for automated thermal closed-loop management.
- Tachometer Diagnostic Output: Features an open-collector speed sensor generating two pulses per revolution for real-time motor health monitoring.
- Precision Bearing Assembly: Incorporates dual ball bearings engineered to deliver an IPC 9591 L10 service life of 102,500 hours.
- Electronic Motor Safeguards: Equipped with locked-rotor auto-restart recovery cycling and internal rectifying diode reverse polarity protection.
- Industrial Compliance: Fully certified to UL507, CSA C22.2, VDE EN 60950, CCC, CE, and RoHS standards for worldwide deployment.
Technical Specifications
| Manufacturer | ebm-papst |
|---|---|
| Manufacturer Part Number (MPN) | 3218J/2H4P |
| Alternate Part Number | 3218J2H4P |
| Product Series | 3200J |
| Product Designation Code | VWC0092JUGCS |
| Product Category | DC Axial Fans |
| Fan / Component Type | Tubeaxial Compact Fan |
| Phase & Supply Type | DC |
| Rated Voltage | 48 VDC |
| Operating Voltage Range | 20.0 to 58.0 VDC |
| Speed (RPM) | 13,000 RPM (100% PWM) / 6,800 RPM (PWM 0010 condition) |
| Power Rating | 50.0 W (Nominal at 100% PWM) |
| Rated Current | 1.00 A (at 1 kHz PWM) / 0.90 A (at 5 kHz PWM) |
| Minimum Current Draw | 400 mA (at 6,800 RPM / 8.5 W) |
| Starting Current Consumption | 3,800 mA |
| Max. Current Draw | 3,800 mA (Locked Rotor Peak) |
| Airflow | 167.7 CFM (285.0 m³/h) |
| Optimal Operating Airflow | 111.8 CFM (190.0 m³/h) |
| Static Pressure | 3.21 in H₂O (800 Pa) |
| Optimal Operating Pressure | 1.50 in H₂O (374 Pa) |
| Noise Level (Sound Pressure) | 76.0 dB(A) at free air (1 m distance) |
| Sound Power Level | 8.0 Bel(A) at optimal operating point |
| Airflow Direction | Air outlet over struts |
| Direction of Rotation | Clockwise (looking at rotor) |
| Dimensions (L × H × D) | 92.0 × 92.0 × 38.0 mm (3.62 × 3.62 × 1.50 in) |
| Mounting Fastener Size | M4 (ISO 4762) |
| Mounting Torque | 30 Ncm (at mounting flanges) |
| Housing Material | Plastic (UL94 V-0 rated PBT) |
| Impeller Material | Plastic (PA) |
| Bearing Type | Dual Ball Bearings |
| Installation Position | Any (horizontal or vertical) |
| Weight | 0.280 kg (0.617 lbs) |
| Termination & Cable Specs | 4 Lead Wires, AWG 22, Length: 310 mm ± 10 mm (12.2 in), stripped/tinned ends |
| Lead Wire Insulation Diameter | 1.30 mm |
| Wiring Pinout / Connection | Pin 1: Red (+UB) | Pin 2: Blue (-GND) | Pin 3: Violet (PWM) | Pin 4: White (Tachometer /2) |
| Control Input Feature | PWM (Speed-Controlled via Open Collector, 1 kHz to 5 kHz) |
| Signal Output Feature | Tachometer /2 Open Collector (2 pulses/revolution, max sink current 4 mA, max 60 V) |
| Tachometer Output Low Voltage | ≤ 0.4 V (at Isink 2 mA) |
| Tachometer Signal Slew Rate | ≥ 0.5 V/µs |
| Locked Rotor Protection | Electronic auto-restart (Cycle t3/t4: 0.5 s run / 10 s standby) |
| Reverse Polarity Protection | Internal rectifying diode (Max residual current IF ≤ 200 µA at UN) |
| Electrical Protection Class | Class III |
| 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 after 48h at 95% RH / 25°C) |
| Clearance / Creepage Distance | 1.0 mm / 1.5 mm |
| Operating Temperature | -20 °C to +70 °C (-4 °F to +158 °F) |
| Storage Temperature | -40 °C to +80 °C (-40 °F to +176 °F) |
| Climatic Resistance | Humid heat constant acc. to DIN EN 60068-2-78 (14 days), Pollution Degree 1 |
| Service Life (L10 at 40°C) | 60,000 Hours |
| Standards & Compliance | UL507 (File E38324), CSA C22.2 No. 113, VDE EN 60950, CCC GB 12350, CE, EAC, RoHS3 |
Applications
The ebm-papst 3218J/2H4P DC axial fan is engineered for intensive forced-air cooling across telecommunications base stations, optical transport racks, and enterprise server chassis. It serves as an essential active cooling element in high-density variable frequency drives, medical diagnostic scanning instruments, and edge computing enclosures requiring extreme backpressure resistance. Systems integrators and plant maintenance engineers rely on this fan for industrial power inverters, robotics controller cabinets, and ruggedized automated test equipment.
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