Q: What environmental tolerances, surge protection, and cooling safeguards are engineered into the Huawei R4850G2?

The R4850G2 is hardened for harsh telecommunication deployments, operating across -40°C to +75°C (linear power derating occurs above +55°C). Thermal management is governed by an integrated, variable-speed brushless DC axial fan featuring speed detection and fault alarms. Electrical robustness includes comprehensive AC under/overvoltage cutoff, continuous DC output short-circuit hiccup recovery, and over-temperature shutdown. Surge immunity meets 5kA differential/common mode (8/20μs) on AC ports, with high isolation ratings (3000VAC input-to-output, 1500VAC input-to-PE), certified under IEC/EN 60950-1 and UL60950-1, backed by an MTBF exceeding 500,000 hours.

Question 1

What are the core electrical input/output parameters and conversion efficiency of the Huawei R4850G2 rectifier module?

Accepted Answer

The Huawei R4850G2 (SKU: HW-REC-R4850G2-50A) is a high-density 1U telecommunications power rectifier. It features an ultra-wide AC input range of 85VAC to 300VAC (linear derating applies below 176VAC) and delivers a rated output of 3000W when input exceeds 176VAC. DC output operates at nominal -48VDC (adjustable from -42VDC to -58VDC) with a rated continuous current of 50A (peak up to 53.5A). Employing soft-switching topologies and digital PFC, the unit achieves a rated efficiency ≥96% with a peak of 96.5%, PF ≥0.99, and THD ≤5%, substantially minimizing energy consumption in telecom sites and edge data hubs.

Question 2

Which subracks are compatible with the R4850G2, and what are the rules and load-sharing mechanisms for mixed deployment?

Accepted Answer

The R4850G2 natively integrates into Huawei embedded DC systems including ETP48100, ETP48200, and ETP48400, as well as TP-series power cabinets (e.g., TP482000B), communicating with SMU02B/SMU02C controllers via internal CAN bus. Dimensioned at 40.8mm x 105mm x 281mm (1U), it is form-factor compatible with older legacy R4850G1 and R4850N units. The module features active digital current sharing with imbalance <±5% between 50%–100% load. When co-deployed with standard-efficiency rectifiers, the monitoring unit (SMU) can execute an 'eco-cycling/efficiency-first' profile, prioritizing R4850G2 modules for primary baseloads to optimize thermal and power efficiency.

Question 3

What environmental tolerances, surge protection, and cooling safeguards are engineered into the Huawei R4850G2?

Accepted Answer

The R4850G2 is hardened for harsh telecommunication deployments, operating across -40°C to +75°C (linear power derating occurs above +55°C). Thermal management is governed by an integrated, variable-speed brushless DC axial fan featuring speed detection and fault alarms. Electrical robustness includes comprehensive AC under/overvoltage cutoff, continuous DC output short-circuit hiccup recovery, and over-temperature shutdown. Surge immunity meets 5kA differential/common mode (8/20μs) on AC ports, with high isolation ratings (3000VAC input-to-output, 1500VAC input-to-PE), certified under IEC/EN 60950-1 and UL60950-1, backed by an MTBF exceeding 500,000 hours.

Key specifications	Value
AC Input Voltage Range	85VAC ~ 300VAC (Rated 220VAC)
Nominal DC Output Voltage	-42VDC ~ -58VDC (Rated -48VDC)
Rated Output Current	50A (up to 53.5A)
Rated Output Capacity	3000W (input >176VAC)
Power Conversion Efficiency	≥96% (peak efficiency 96.5%)
Cooling Method	Built-in axial fan with intelligent temperature-controlled forced-air cooling
Physical Dimensions Spec	40.8mm x 105mm x 281mm (1U compact form factor)

Huawei R4850G2 High Efficiency Telecom Rectifier Module -48V 50A

What this product is

What this product is

What problem it solves

Who and where it is for

Core advantages

Technical specifications

Applications

Telecom macro and indoor distribution sites

Edge computing and aggregation facilities

Railway transport and industrial command centers

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