The Huawei DCDU-12B is a carrier-grade 1U 19-inch rack-mounted DC Power Distribution Unit (PDU) engineered for telecom macro sites and core network enclosures. Operating across a nominal -48V DC telecom bus infrastructure with total input current handling up to 160A, it features 10 individual industrial-grade Miniature Circuit Breakers (MCBs) to provide granular branch protection, circuit isolation, and power routing for Baseband Units (BBUs), Remote Radio Units (RRUs/AAUs), and transmission transport equipment.
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At its architectural core, the Huawei DCDU-12B implements a low-impedance solid copper distribution busbar capable of terminating single or dual high-capacity -48V DC feeder cables. This central DC rail delivers branch power across 10 dedicated high-reliability MCBs. The enclosure integrates a dedicated alarm aggregation sensing board wired to the auxiliary contacts of each circuit breaker; a branch trip event instantly triggers galvanic dry-contact relay state transitions that feed fault telemetry into external site controllers. The entire mechanical footprint is strictly enclosed within a 1U chassis containing physical insulation covers and clear polarity labeling.
The DCDU-12B eliminates systemic single-point DC feed cascades and cable congestion in high-density base station cabinets. By implementing segregated, selective branch protection via 10 precision breakers, a short-circuit fault on an individual RRU branch cannot trip the master rectifier feed or drop adjacent critical core processors. Furthermore, its completely passive, convection-cooled architecture resolves fan dust clogging, thermal wear, and cramped maintenance bottlenecks common in edge cabinets.
Engineered specifically for 4G/5G macro cell outdoor and indoor cabinets, Cloud-RAN/Distributed-RAN aggregation hubs, edge compute modular data centers, integrated DC power plants, and ruggedized -48V industrial control distribution networks.
| Key specifications | Value |
|---|---|
| Rated Output Voltage | -48VDC (-42V ~ -58V) |
| Maximum Efficiency | ≥ 96.0% |
| Operating Temperature Range | -40°C ~ +75°C |
| Cooling System | Forced Air Cooling with Intelligent Speed Fan |
| Protection Features | Over-voltage, Short-circuit, Over-temperature, Surge |
| Hot-Swappable Support | Yes (Live Plug-and-Play Support) |
| THD | ≤ 5% (Total Harmonic Distortion) |
| Power Factor & THD | ≥ 0.99 at Rated Load |
| Standard Compliance | CE, UL, RoHS, IEC 60950, EN 300 386 |
Huawei
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