
Huawei 021205776T fan unit for BBU 3900 baseband unit.
The Huawei 021205776T is a replacement fan module designed for the BBU 3900 (Baseband Unit 3900). This cooling component maintains optimal operating temperatures within the baseband unit, ensuring reliable performance and preventing thermal-related failures in mobile network infrastructure.
The BBU 3900 is a core component in Huawei’s distributed base station architecture, widely deployed in 2G, 3G, and 4G mobile networks. The fan unit is essential for continuous operation, particularly in equipment rooms and cabinet installations where adequate airflow must be maintained to meet the thermal requirements of high-density baseband processing equipment.
The BBU 3900 platform, while still operational in many networks globally, represents an earlier generation of Huawei’s baseband technology. Operators maintaining legacy sites or extending the service life of existing infrastructure will find replacement fan units necessary as part of routine maintenance and spares management.
Available from Tech Star as new or refurbished stock. Submit a price enquiry for availability and lead time.

| Manufacturer | Huawei |
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| Platform | Huawei SingleRAN |
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| Manufacturer | Huawei |

| Platform | Huawei RRU 3959 Series |
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| Manufacturer | Huawei |

| Platform | Huawei RTN Microwave |
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| Manufacturer | Huawei |

| Manufacturer | Huawei |
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| Manufacturer | Huawei |
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| Key Features | Cooling fan module; Hot-swappable design; Maintains thermal regulation for baseband unit |
|---|---|
| Applications | Mobile network base station maintenance; BBU 3900 spares inventory; Legacy network site support |
| Compatibility | Huawei BBU 3900; Huawei distributed base station systems |
| Platform | BBU 3900 |
| Manufacturer | Huawei |
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