Q1 Core electrical specifications and power conversion efficiency

The ETP48400-C4A1 operates on a wide input voltage window of 85V AC to 300V AC (rated 200V AC - 240V AC phase). Fully populated with 8x R4850G2 rectifiers, it provides continuous output of -48V DC / 400A (adjustable -42V to -58V DC) with overall conversion efficiency ≥ 96%, power factor PF ≥ 0.99, and total harmonic distortion THD ≤ 5%.

Q2 Chassis modularity, rectifier interoperability, and internal bus topologies

The chassis natively accepts Huawei 50A high-efficiency rectifiers (R4850G2, R4850N1) with active hot-swap and automatic load-sharing imbalance below ±5%. Rectifiers communicate with the host via internal CAN bus. The SMU02C supervisor exposes 10/100M Fast Ethernet (HTTPS/SNMPv1-v3) and RS485 for third-party dynamic supervisory network integration.

Q3 Environmental resilience, thermal limits, and surge suppression ratings

The system is certified for -40°C to +65°C operating temperatures (with linear derating above 55°C) and 5% to 95% relative humidity (non-condensing). The integrated AC lightning arrester delivers Class C protection (In 20kA, Imax 40kA, 8/20μs), while DC distribution exhibits 10/20kA differential and common-mode surge withstand.

HuaweiModel: Huawei ETP48400-C4A1

Huawei ETP48400-C4A1 9U 400A Embedded Telecom DC Power Subrack System (with SMU02C & R4850 Compatibility)

Huawei ETP48400-C4A1 is an industrial-grade 9U 19-inch rack-mounted embedded DC power system engineered for high-capacity telecom sites and IT equipment rooms, delivering up to 400A (-48V DC) continuous output across 8 rectifier slots with three-phase/single-phase flexible AC input and intelligent SMU02C monitoring.

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System Output Capacity: 400A (-48V DC)
Rectifier Module Slots: 8 Slots
Form Factor: 19-Inch Rackmount
System Monitoring Controller: SMU02C Intelligent Network Management Controller
AC Input Voltage: 85V AC ~ 300V AC
Power Conversion Efficiency: ≥ 96%

What this product is

The system features an integrated 9U chassis layout comprising high-capacity AC/DC distribution circuit breakers at the upper tier, an SMU02C controller with UIM interface cards in the mid-tier, and an 8-slot dual-row hot-swap rectifier bay at the bottom.

What problem it solves

Resolves severe vertical space constraints in modern telecom cabinets, eliminates single-point DC feed failures, prevents premature lead-acid/lithium battery depletion, and minimizes site energy loss via 96%+ conversion efficiency.

Who and where it is for

Engineered for 5G macro sites, core metro aggregation, and enterprise data centers, the Huawei ETP48400-C4A1 subrack accommodates up to eight R4850G2/R4850N1 50A rectifiers. It integrates multi-channel load distribution, dual-level low voltage disconnection (LLVD/BLVD), and SNMP-enabled remote supervision.

Core advantages

Ultra-Dense 400A Output: Compact 9U chassis delivers up to 400A nominal capacity to satisfy multi-carrier wireless and transport nodes
Exceptional Power Efficiency: Optimized for R4850G2 modules with peak energy efficiency exceeding 96%, slashing operating OPEX
Comprehensive Battery Protection: Programmable LLVD and BLVD contactor schemes prioritize critical loads and prevent battery over-discharge
Carrier-Grade Fleet Management: Driven by SMU02C controller supporting SNMPv3, WebUI, CAN bus, and multi-channel environmental telemetry

Technical specifications

Key specifications	Value
AC Input Voltage	85V AC ~ 300V AC
System Output Capacity	400A (-48V DC)
Form Factor	19-Inch Rackmount
System Monitoring Controller	SMU02C Intelligent Network Management Controller
Rectifier Module Slots	8 Slots
Power Conversion Efficiency	≥ 96%
DC Distribution Branches	Multi-Channel DC Branches + Two-Stage Disconnect (LLVD/BLVD)
Operating Temperature Range	-40°C to +65°C

Applications

5G/4G Centralized Radio Access Network (C-RAN) and macro base stations

Optical transport network (OTN) nodes and regional aggregation hubs

Data center in-row telecom cabinets and enterprise edge computing racks

Railway and industrial SCADA continuous DC uninterruptible power systems

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