The 3258J/2HHP is a compact DC axial fan from EBM-Papst with an integrated wall ring, measuring 92 × 92 × 38 mm. The fan is designed for 48 V DC (voltage range 36–56 V) and delivers an impressive airflow of up to 235 m³/h. With ball bearings and a robust plastic housing, it is built for a long and reliable service life.
Thanks to PWM speed control and an open collector tach output, the 3258J/2HHP is ideally suited for applications requiring precise speed control and feedback — for example, cooling electronics, industrial equipment, and control cabinets.
- Voltage: 48 V DC (36–56 V)
- Airflow: up to 235 m³/h
- Static pressure: max 285 Pa
- Speed: 6,650 rpm
- Power: 24.3 W
- Sound pressure: 59 dB(A)
- Bearing type: ball bearing
- Motor protection: reverse polarity protection and automatic restart on locked rotor
- Connection: cable 310 mm, 3-wire with open collector tach
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Technical specifications
Datasheet (PDF) - download| Product attribute | Value |
|---|---|
| Airflow at 0 Pa | 235 m³/h |
| Speed | 6650 rpm |
| Power | 24.3 W |
| Voltage | 48 V DC VAC |
| Motor frame | The fan has a square plastic casing measuring 92 × 92 × 38 mm and weighs 0.25 kg. Mounting is done via flanges at both ends with ISO 4762 M4 screws, degreased and without washers. The maximum torque for mounting is 50 Ncm at the cable outlet corner and 110 Ncm at the other corners. The mounting position around the axis is optional. |
| Casing | plastic, square |
| Impeller | The fan impeller is made of plastic and mounted on an axle with ball bearings for a long service life. The airflow direction is out over the struts (air outlet over struts). At free airflow and 100% PWM, a maximum airflow of 235 m³/h and a maximum static pressure of 285 Pa are achieved. The optimal operating point is 160 m³/h at 133 Pa. |
| Bearing type | ball bearing |
| Rotation direction | clockwise |
| Motor type | The motor is a DC motor with PWM speed control and a nominal voltage of 48 V DC (voltage range 36–56 V). It is equipped with reverse polarity protection via a rectifier diode and automatic restart in case of a locked rotor. The locked rotor current is approximately 1800 mA at nominal voltage. The motor has a built-in open collector tachometer output that provides 3 pulses per revolution. |
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