Emerson BML 440 030/1 Rectifier R48-1800 Standard Efficiency Module

The Emerson BML 440 030/1 (model R48-1800) is a high-density, switch-mode rectifier designed to convert standard AC supply voltages into stable nominal -48V DC power. This module delivers a maximum output power of 1800W and is a core component of NetSure DC power systems. It is engineered to support a wide variety of telecommunications applications, including central offices, cellular base stations, and data centers. The R48-1800 features a wide input voltage range (85V AC to 300V AC) with active Power Factor Correction (PFC), ensuring operational continuity even in regions with unstable power grid conditions.The rectifier utilizes a digital control architecture that allows for precise voltage regulation and efficient load sharing when installed in parallel configurations. It communicates with the system controller via the CAN bus, providing comprehensive telemetry data, including output current, operating temperature, and alarm status. The unit is equipped with advanced protection mechanisms, such as over-voltage protection, current limiting, and thermal derating, which automatically adjusts output power to prevent damage under extreme environmental conditions.
Designed for high availability, the BML 440 030/1 is fully hot-pluggable, enabling "zero-downtime" maintenance and N+1 redundancy upgrades. The unit is cooled by an integrated, front-to-back forced-air system with a variable-speed fan that optimizes airflow based on the current load. Its compact 1U form factor and high power density allow for maximum slot utilization within the power shelf. The module is compliant with international safety and EMC standards, providing a low-noise DC output that protects sensitive radio and networking equipment from electrical interference.