The 255H from EBM-Papst is a compact DC fan in the DC axial fan category, designed for applications where space is limited. With its dimensions of only 25 × 25 × 8 mm and an operating voltage of 5 V DC, it is perfect for electronics cooling and embedded systems. The fan delivers 4.6 m³/h of airflow at 12,000 rpm and a noise level of just 23 dB(A).
Thanks to the optional mounting position and the 160 mm long connecting cable, the 255H is easy to integrate into tight designs. It is suitable for developers and manufacturers who need a reliable and quiet cooling fan in mini format.
- Dimensions: 25 × 25 × 8 mm, square plastic housing
- Voltage: 5 V DC (range 4.5–5.5 V)
- Airflow: 4.6 m³/h at free flow
- Max static pressure: 47 Pa
- Speed: 12,000 rpm, counter-clockwise rotation from rotor side
- Noise level: 23 dB(A)
- Bearing type: sleeve bearing, L10 life 35,000 h at 20 °C
- Motor protection: impedance protected against locked rotor
At Reserv, EBM-Papst products are stocked by our wholesaler, ensuring fast delivery and access to original products. Order the 255H with confidence — you always get genuine spare parts of the highest quality. See the datasheet on the product page for complete technical information.
Technical specifications
Datasheet (PDF) - download| Product attribute | Value |
|---|---|
| Airflow at 0 Pa | 4.6 m³/h |
| Speed | 12,000 rpm |
| Power | 0.6 W |
| Voltage | 5 V DC VAC |
| Motor frame | The housing is made of plastic and has dimensions of 25 x 25 x 8 mm. ISO 4762 M2.5 screws are used for mounting. The mounting position is optional with respect to the shaft direction. The maximum tightening torque when mounting over both mounting flanges is 20 Ncm for the remaining corners. |
| Casing | plastic, square |
| Impeller | The fan wheel is made of plastic and rotates counter-clockwise when viewed from the rotor side. The airflow is directed with the air outlet over the support legs. With free airflow and 12,000 rpm, the fan delivers 4.6 m³/h with a maximum static pressure of 47 Pa. |
| Bearing type | plain bearing |
| Motor protection | impedance protected |
| Motor code | VWC0025AUBAS |
| Rotation direction | counter-clockwise |
| Motor type | The motor is a DC motor with sleeve bearings and impedance protection against locked rotor. The nominal voltage is 5 V DC with a voltage range of 4.5–5.5 V. Power consumption at free airflow is nominally 0.6 W and current consumption is nominally 120 mA. The motor does not have a built-in tachometer signal or PWM control. The service life is L10 = 35,000 h at 20 °C ambient temperature. |
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