0.5EV-0.71-20-4620

Function and construction of 0.5EV-0.71-20-4620

The unit combines an axial impeller, compact housing and an electrical drive. Its upper and lower operating points have different airflow and total-pressure values, so selection must be based on the required mode rather than appearance alone.

The fan is a component of the cooled equipment, not a complete ventilation installation. Air-path resistance, correct rotation, unobstructed inlet and outlet and the specified supply affect its installed performance.

Electrical and airflow parameters

At the upper operating point, airflow is at least 70 m³/h and total pressure is 200 ±30 Pa. At the lower point, airflow is not more than 35 m³/h and total pressure is 100 ±15 Pa. Current is not more than 1.4 A and speed is at least 11,200 rpm.

Airflow and pressure refer to documented operating points and should be checked together. A visually similar fan with another suffix, voltage or frequency is not automatically interchangeable.

Operating conditions and inspection

The exact supply execution is 27 V DC with a documented deviation of −3/+4 V. The assembly mass is not more than 0.33 kg. The installed circuit calls for a capacitor of at least 1,000 µF; its rating and connection must be verified from the equipment documentation.

Incoming inspection should cover the marking, housing, impeller, connector or leads, mounting points and free rotation. Unusual noise, vibration, overheating, current deviation or reduced airflow requires investigation under approved maintenance documentation.

Related cooling fans and selection

Functionally related catalogue positions include 0.63EV-1.4-32-4620 and EV-0.2-1540A. These links support navigation and do not establish electrical, mechanical or installation interchangeability.

Application to a specific aircraft, helicopter, ground unit or electronic block must be confirmed from its illustrated parts catalogue, wiring diagram or approved service documentation.

Identification and ordering

The designation may be encountered as 0.5EV-0.71-20-4620; 0.5 EV 0.71 20 4620; 0,5ЭВ-0,71-20-4620. These are writing and search variants; execution suffixes and nameplate marks remain significant.

An inquiry should state the complete marking, quantity, required condition, delivery set and documentation requirements. Other units are listed in the Cooling & Ventilation Fans category.