Huawei ETP4890-A2 1U Subrack Telecom Power System (90A/-48VDC/Supports 3×R4830G1/SMU01C) Official Studio Photo 1
HuaweiModel: Huawei ETP4890-A2

Huawei ETP4890-A2 1U Subrack Telecom Power System (90A/-48VDC/Supports 3×R4830G1/SMU01C)

The Huawei ETP4890-A2 is a 1U 19-inch rack-mounted embedded DC power supply designed with a wide-input AC architecture and digital switching topology, accommodating up to three 30A rectifier modules (90A total at -48V DC nominal) alongside an intelligent SMU01C controller to ensure reliable, high-efficiency power for edge and telecommunication sites.

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System Output Capacity
90A (-48V DC)
Rectifier Module Slots
3 Slots
Form Factor
88.9 (2U) × 442 × 255 mm
System Monitoring Controller
SMU01C / SMU01B Intelligent Controller Module
AC Input Voltage
85V AC ~ 300V AC (Nominal 220V AC)
Power Conversion Efficiency
≥ 96%

What this product is

What this product is

An ultra-dense DC subrack system integrating AC power distribution, three hot-swappable rectifier bays, one intelligent supervisory slot (SMU01C/SMU01B), and multi-channel DC distribution with battery and load breakers within a standardized 1U form factor (43.6mm height).

What problem it solves

Eliminates physical space limitations in 1U-reserved outdoor cabinets, safeguards systems against severe grid anomalies via wide voltage resilience, prevents lead-acid/lithium battery deep discharge using intelligent LVD, and simplifies remote management in unmanned sites.

Who and where it is for

5G/4G wireless base stations, access network central offices, optical transport nodes (FTTx/OLT), railway signaling/dispatch centers, and industrial automation control racks.

Core advantages

  • Ultra-Compact 1U Density: Delivers 90A pure DC power within a 43.6mm height, preserving critical cabinet U-space
  • High Energy Efficiency: Reaches ≥96% conversion efficiency with R4830G1 rectifiers, drastically lowering operational costs
  • Extreme Voltage Adaptability: Operates stably between 85V AC and 300V AC; withstands up to 415V AC phase surges
  • Two-Stage Low Voltage Disconnect: Configurable LLVD and BLVD thresholds to maximize uptime for primary mission-critical loads

Technical specifications

Key specificationsValue
System Output Capacity90A (-48V DC)
AC Input Voltage85V AC ~ 300V AC (Nominal 220V AC)
Form Factor88.9 (2U) × 442 × 255 mm
System Monitoring ControllerSMU01C / SMU01B Intelligent Controller Module
Rectifier Module Slots3 Slots
Power Conversion Efficiency≥ 96%
DC Distribution BranchesBattery: 1×80A + Load: 1×40A, 2×25A, 2×16A
Operating Temperature Range-40°C to +65°C

Applications

01

Outdoor 5G/LTE Micro Base Station Power Enclosures

02

Enterprise Edge Aggregation and FTTx/GPON Transmission Hubs

03

Substation SCADA, Switchgear Automation, and Power Distribution

04

Intelligent Transport Systems (ITS) and Rugged Industrial IoT Racks

Frequently asked questions

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HuaweiModel: DBU50B-N12A3

Huawei DBU50B-N12A3 Embedded DC Backup Power Unit (-48V 50A 19-Inch Subrack)

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