Question 1

What are the core electrical input/output parameters and conversion efficiency metrics of the Huawei R4850N1 rectifier module?

Accepted Answer

The Huawei R4850N1 is a digital telecom switch-mode rectifier with a nominal output rating of 3000W. It supports an ultra-wide AC input range of 85VAC to 300VAC, delivering full 3000W output between 176VAC and 290VAC (with linear derating from 176VAC down to 85VAC). It provides a standard -48VDC output (adjustable from -42VDC to -58VDC) with a rated current of 50A. With a peak conversion efficiency of 94.0%, a power factor (PF) ≥ 0.99, and total harmonic distortion (THD) ≤ 5%, it minimizes reactive power loss while maintaining an ultra-low output ripple and noise profile (≤ 200mVp-p).

Question 2

Which Huawei power subracks support the R4850N1, and how are hot-swapping and active load-sharing implemented?

Accepted Answer

With a standard form factor of 130 × 85 × 285 mm, the R4850N1 natively integrates into Huawei embedded and cabinet power systems, including the ETP48100, ETP48200, ETP48300, and ETP48400 series. It supports fully safe live hot-plugging with built-in inrush current limitation. Module communication is managed via CAN bus linked to system controllers (e.g., SMU02B/SMU02C). Autonomous hardware/software active load sharing ensures current unbalance among parallel units remains under ±5%, enabling seamless N+1 or N+M redundant expansion without interruption.

Question 3

What are the environmental tolerance metrics and internal hardware protection mechanisms of the R4850N1 under harsh conditions?

Accepted Answer

Engineered for rugged outdoor base stations, the R4850N1 operates within an ambient range of -40°C to +75°C, delivering full rated capacity up to +55°C followed by controlled linear thermal derating. Heat dissipation is handled by an intelligent variable-speed fan. Protection circuitry includes AC input surge protection (2kV DM / 4kV CM), high-voltage withstand capability up to 415VAC, DC output over-voltage clamp, short-circuit hiccup recovery, and reverse polarity safety, delivering a field-proven MTBF exceeding 500,000 hours.

Key specifications	Value
Nominal DC Output Voltage	-48 V DC
Rated Output Current	50 A
Power Conversion Efficiency	94.0 %
Physical Dimensions Spec	130 × 85 × 285 mm
AC Input Voltage Range	85 ~ 300 V AC
Operating Temperature	-40 ~ +75 °C

Huawei R4850N1 Classic Telecom Rectifier Module -48V 50A 3000W

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Cellular Macro & Micro Wireless Sites

Metro Optical Transmission Hubs

Utility SCADA Substation DC Systems

Transportation Traffic Signaling Enclosures

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