Huawei R4875G1 Rectifier Module 4500W. Model R4875G1.

Product Overview

The Huawei R4875G1 is a 4500W hot-swappable -48 VDC rectifier module for -48 VDC telecom power systems, base station cabinets and data center DC plants. Active PFC delivers near-unity power factor with low THD, while digital control and CAN/RS485 monitoring enable intelligent rectifier management, module sleep for part-load efficiency and N+1 redundancy inside the host power system.

BS Comtec stocks R4875G1 modules for system expansion and replacement — genuine modules, worldwide delivery, request a quote.

Key Features

• Output Power: 4500 W
• Output Current: 75 A
• Nominal Voltage: -48 VDC (42-58 VDC adjustable, 53.5 VDC default)
• Efficiency: ≥ 96%
• Input Voltage Range: 85-300 VAC, single-phase (or 110 VAC dual-line)
• Communication: RS485

Specifications

Key Features of R4875G1 Rectifier Module

R4875G1 Rectifier Module belongs to the high-efficiency rectifier module family that converts AC mains into a stable 48 V DC output. Modules of this class commonly support hot-swap installation, wide AC input windows and monitoring via system controllers.

Typical Applications of R4875G1 Rectifier Module

Rectifier modules of this type are widely used in telecom power systems, data center DC plants and industrial power cabinets, usually alongside batteries for backup.

Selecting R4875G1 Rectifier Module with BS Comtec

BS Comtec supplies rectifier modules from Eltek, Huawei, Vertiv and other brands with global delivery. Tell us your DC load and shelf or system type, and we will match compatible modules.

Engineering Notes for Huawei R4875G1 Deployments

75 A Rectifier Power for BTS, Central Offices and Solar-Hybrid Sites

Each R4875G1 delivers 75 A (4500 W) at -48 VDC, so one shelf of modules can carry a mid-size BTS or a central office plant. In solar-hybrid sites across Africa, the Middle East and Latin America, the rectifier bank recharges batteries from AC mains or a generator while PV carries the daytime DC load, holding the -48 V bus through outages.

N+1 Redundancy: Sizing the Rectifier Bank

Size an N+1 bank in three steps: divide the continuous DC load current by the 75 A per-module output, round up to the next whole number (N), then add one spare module. Example: a 150 A load needs 150 / 75 = 2 active modules, so N+1 = 3 R4875G1 modules. If the plant must also recharge the battery after an outage, size N against load plus recharge current, or accept a longer recharge window.

Charging VRLA and LiFePO4 Batteries in the 42-58 VDC Window

The 42-58 VDC adjustable output window (53.5 VDC default) covers both lead-acid and lithium plants. A 24-cell VRLA string typically floats around 54.0-54.5 V and equalizes near 55.2-56.4 V, while 15S/16S LiFePO4 packs charge in the 54.0-56.0 V range under BMS supervision – all inside the module window. Set float and equalize points on the system controller, enable temperature-compensated charging for VRLA, and let the controller enforce the lithium charge profile.

High-Temperature Derating and Air-Cooling Maintenance

The module operates from -40 °C to +75 °C with no derating below +55 °C; above that point output derates per the datasheet curve, so cabinet ventilation matters in hot climates. For forced-air-cooled cabinets: keep intake filters clean, check fans on scheduled visits, never bundle cables across module vents, and leave service clearance so hot exhaust does not recirculate into the intake.

Where R4875G1 Sits in the Huawei Rectifier Ladder

Within the Huawei 48 V family, R4830G2 (30 A) and R4850G2 (50 A) serve lower power tiers, while the 75 A R4875G1 targets higher rack power density: more watts per shelf position and fewer modules to install and monitor for the same load. Choose the lower tiers for compact cabinets and modest loads; step up to R4875G1 when load growth or cabinet space demands higher density.

Parallel Operation, Current Sharing and Monitoring

Paralleled R4875G1 modules share load actively, and module sleep keeps remaining units in their most efficient band at part load. CAN/RS485 links each module to the host power system controller for voltage, current, alarm and life-cycle data, so N+1 health can be supervised from the operations center.

Frequently Asked Questions

How do I select R4875G1 Rectifier Module for my power system?

Check output voltage, module power rating, efficiency class and compatibility with your existing rectifier shelf or controller. BS Comtec can verify fitment and propose the right quantity.

Is R4875G1 Rectifier Module compatible with my existing system?

Compatibility depends on the rectifier shelf, controller and communication protocol. Send your current system model to BS Comtec and we will confirm which modules fit.

How is R4875G1 Rectifier Module delivered?

Modules are packed in anti-static, export-standard cartons and shipped worldwide. Delivery time depends on stock and destination — contact BS Comtec for current lead times.

What warranty applies to R4875G1 Rectifier Module?

Warranty follows the manufacturer’s policy for the specific module. BS Comtec supports testing guidance, replacement requests and RMA coordination per the terms of your order.

Where is R4875G1 Rectifier Module typically used?

It is typically used in telecom base stations, central offices, data center power rooms and industrial sites requiring reliable 48 V DC conversion.

What are the key specifications of R4875G1?

R4875G1 key specs: -48 VDC (42-58 VDC adjustable, 53.5 VDC default); 75 A; 4500 W; ≥ 96%. Full datasheet and test report available from BS Comtec on request.

Does BS Comtec supply R4875G1?

Yes. BS Comtec supplies R4875G1 (Huawei line) from Singapore stock, MOQ from 1 piece; in-stock items dispatch within 24-48 hours with worldwide shipping.

Is there a cross-reference or equivalent for R4875G1?

BS Comtec maintains a cross-reference chart covering Huawei, Vertiv (Emerson), Eltek, ZTE and Delta 48V modules. Contact us for the direct equivalent of R4875G1.

What is the price of Huawei R4875G1 rectifier module?

BS Comtec supplies Huawei R4875G1 (4500 W hot-swap -48 VDC rectifier) from Singapore stock with worldwide delivery. Pricing depends on quantity and destination; request a quote for current rates. MOQ starts from 1 piece and in-stock items dispatch within 24–48 hours. All modules are genuine with full traceability.

How does Huawei R4875G1 compare to R4850G6?

The Huawei R4875G1 is a 4500 W -48 VDC hot-swappable rectifier module designed for telecom power systems and data center DC plants. Compared to R4850G6, it offers a different power tier within the same product family. Both share -48 VDC output architecture, CAN/RS485 monitoring and N+1 redundancy support. Contact BS Comtec for a side-by-side datasheet comparison.

Where can I get the datasheet and specifications for Huawei R4875G1?

Huawei R4875G1 key specs include -48 VDC output (adjustable range), 4500 W rated power, hot-swap design for live module replacement, active PFC with high power factor (≥ 0.99) and high efficiency conversion. Communication interfaces include CAN bus and RS485 for system monitoring. Full datasheet and test report available from BS Comtec on request.

How many R4875G1 modules do I need for N+1 redundancy?

Divide your continuous load current by 75 A, round up to the next whole number, then add one module. Example: a 150 A load needs 2 active R4875G1 modules plus 1 spare = 3 modules total. Include battery recharge current in the sizing, or accept a longer recharge window after outages.

Which battery types can the R4875G1 charge?

The 42-58 VDC adjustable window supports 24-cell VRLA strings (float around 54.0-54.5 V, equalize up to about 56.4 V) and 15S/16S LiFePO4 packs around 54.0-56.0 V, set via the system controller and subject to BMS limits. Send BS Comtec your battery datasheet and we will confirm the charge settings.