Question 1

What are the core electrical performance specifications and efficiency metrics of the Huawei S4875G1 rectifier module?

Accepted Answer

The Huawei S4875G1 (SKU: HW-REC-S4875G1-75A) utilizes active power factor correction (APFC) and soft-switching resonant topology. It accommodates a wide AC input range of 85–300 V AC (delivering full 4000W rated power at 176–300 V AC, with linear derating between 85–176 V AC) and delivers a nominal -48 V DC output (adjustable from -42 to -58 V DC) with a 75 A rated output current. It achieves a peak power conversion efficiency of 96.5%, a power factor (PF) ≥ 0.99, and total harmonic distortion (THD) ≤ 5%, greatly minimizing thermal dissipation and energy operational expenditure in high-density 5G installations.

Question 2

Which Huawei power subracks are compatible with the S4875G1, and does it support hot-swapping and autonomous load sharing?

Accepted Answer

Engineered in a compact 1U form factor (40.8 × 105 × 281 mm), the Huawei S4875G1 is fully compatible with advanced Huawei DC power subracks, including the ETP48400, ETP48200, MTS9000, and MTS9300 outdoor shelter systems. The rectifier features hot-swappable plug-and-play capability and onboard CAN/RS485 digital interfaces for seamless telemetry with monitoring controllers such as the SMU02C. It utilizes autonomous digital load-sharing technology with current imbalance strictly below ±5%, facilitating smooth on-demand capacity scaling and seamless retrofit in -48V telecom environments.

Question 3

How is the Huawei S4875G1 engineered for extreme environmental tolerance, surge protection, and unstable grid conditions?

Accepted Answer

The S4875G1 offers carrier-grade durability, operating across a wide temperature spectrum of -40 to +75 °C (full-load output without derating from -40 to +55 °C, transitioning to intelligent thermal linear derating above 55 °C). Forced air cooling is regulated by an integrated variable-speed silent fan. Electrically, it features robust surge protection (differential mode 4kV / common mode 5kA), sustained input overvoltage withstand up to 415 V AC without hardware damage, output overvoltage latch-off, auto-recovery short-circuit protection, and overcurrent clamping, ensuring resilient uninterrupted power in harsh edge environments.

Key specifications	Value
Nominal DC Output Voltage	-48 V DC
Rated Output Current	75 A
Power Conversion Efficiency	96.5 %
Physical Dimensions Spec	40.8 (1U) × 105 × 281 mm
Rated Output Power	W
AC Input Voltage Range	85 ~ 300 V AC
Operating Temperature	-40 ~ +75 °C

Huawei S4875G1 Ultra-High Efficiency Telecom Rectifier Module -48V 75A 4000W

What this product is

What this product is

What problem it solves

Who and where it is for

Core advantages

Technical specifications

Applications

5G Wireless Macro Base Stations

Hybrid Solar-Diesel-Grid Telecom Sites

Data Center High-Density DC Plants

Core Optical Fiber Transmission Hubs

Frequently asked questions

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