Vertiv eSure R48-3500e 3500W 48V High Efficiency Telecom Rectifier Module. Model R48-3500e.

Product Overview

The eSure R48-3500e converts standard AC supply into a stable, adjustable -42 to -58 VDC output rated 3500 W at output voltages above 48 VDC, with up to 73 A at -48 VDC and a 7.3-73 A limit set point. Its optimized 287 mm depth reduces footprint so the module installs in short-depth racks and cabinets where standard-depth rectifiers do not fit.

Input spans 85-305 VAC (200-277 VAC nominal, 45-65 Hz) at up to 22.5 A with a 0.99 power factor, and peak efficiency reaches 96.3%, approaching 97%. The module operates from -40 to +75 degC and up to 2000 m altitude at full power, supported by DSP-based control, active load sharing and CAN bus alarm reporting to the system controller with LED status indication.

Compliance covers safety per EN, IEC and UL 60950 and EMC per ETSI EN 300 386:2005, FCC Part 15 and Telcordia GR-1089-CORE Issue 6 Class B, with psophometric noise below 2 mV / 32 dBrnc. The ordering product code is 1R483500E, and the hot-pluggable design facilitates future system extension.

Key Features

• 3500 W output with 73 A limit at -48 VDC
• 96.3% peak efficiency, approaching 97%
• Optimized 287 mm depth for short-depth racks and cabinets
• Wide 85-305 VAC input (200-277 VAC nominal) at 22.5 A max
• Operation from -40 to +75 degC, 2000 m altitude at full power
• DSP control, CAN bus reporting, hot-pluggable; EN/IEC/UL 60950 and GR-1089 Class B compliant

Specifications

Key Features of eSure R48-3500e 3500W

eSure R48-3500e 3500W 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 eSure R48-3500e 3500W

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 eSure R48-3500e 3500W 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 the Vertiv R48-3500e

3500 W Rectifier Power for Remote BTS and Solar-Hybrid Sites

Rated 3500 W with 73 A available at -48 VDC, the R48-3500e powers remote BTS sites and small central offices where grid supply is weak or intermittent. Its short 287 mm depth suits the compact cabinets common at tower bases and roadside shelters. In solar-hybrid sites across Africa, the Middle East, Latin America and Europe, the module tops up the battery from AC mains or generator input while PV arrays carry the daytime load, holding the -48 V bus through outages.

DC-Coupled Architecture: Rectifier Plus Lithium Battery

In a DC-coupled microgrid, rectifiers, PV charge controllers and the lithium battery bank all connect to the same -48 V bus, so energy flows without extra AC conversion stages and overall conversion losses stay low. The 7.3-73 A limit set point lets the system controller cap rectifier current to match a LiFePO4 pack’s charge rating, while hot-pluggable installation lets capacity grow with the site load – add another R48-3500e module instead of re-engineering the power plant.

Thermal Management and Airflow in Compact Cabinets

The module is specified from -40 to +75 °C at full power up to 2000 m altitude, with forced-air cooling. In short-depth cabinets, keep intake vents clear, clean dust filters on scheduled visits, avoid bundling cables across module exhausts, and monitor cabinet ambient temperature; sustained high ambient pushes the plant toward thermal derating and shortens battery service life.

Monitoring Protocols and Remote O&M

DSP-based control with CAN bus alarm reporting feeds module status to the system controller, where operators read alarms, adjust float settings and set current limits; LED indicators give an at-a-glance state during site visits. Integrated with a network operations center, a shelf of R48-3500e modules can be supervised remotely – voltage, current, alarms and module health – reducing truck rolls to unmanned sites.

Positioning Against Peers in the 2-5 kW Class

In the 2-5 kW rectifier class, the Eltek Flatpack2 48/2000 sits below at 2000 W and the Huawei R4875G1 above at 4500 W; the R48-3500e holds the middle 3500 W tier with 96.3% peak efficiency and a 287 mm footprint – a balanced choice when cabinet depth and mid-range capacity both matter. The later Vertiv R48-3500E4 is an evolved variant of this module with minor parameter differences; see its separate product page on BS Comtec.

Frequently Asked Questions

How do I select eSure R48-3500e 3500W 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 eSure R48-3500e 3500W 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 eSure R48-3500e 3500W 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 eSure R48-3500e 3500W?

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 eSure R48-3500e 3500W 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.

How many R48-3500e modules do I need for N+1 redundancy?

Divide the continuous DC load current by 73 A per module, round up to the next whole number, then add one spare. Example: a 200 A load needs 200 / 73 = 2.74, so 3 active modules, and N+1 = 4 R48-3500e modules total. Add battery recharge current to the load, or accept a longer recharge window after outages.

When should I replace or upgrade R48-3500e modules?

Plan replacement when site load growth exceeds installed capacity, when measured efficiency drops or fans run hot and noisy, or when spare parts and factory support for the module generation end. For new builds needing the same footprint with updated parameters, the Vertiv R48-3500E4 is the direct evolution – BS Comtec can compare both options and quote the right one.