The Delta ESR4850DE is an industrial-grade, carrier-class telecom switch-mode rectifier module delivering a rated 54V DC (adjustable from 43V to 58V DC) output, 50A maximum output current, and 2900W of continuous output power. Engineered for mission-critical DC power plants, it operates over a wide single-phase AC input range of 80V AC to 300V AC.
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The ESR4850DE integrates high-performance two-stage power conversion comprising an active boost PFC stage and an isolated DC-DC resonant topology. Supervised by a high-speed DSP/microcontroller, the unit incorporates active autonomous current sharing, dual closed-loop regulation, and compliance with stringent telecom safety and EMC standards including IEC/EN 62368 and ETSI EN 300 386.
This module mitigates field vulnerabilities caused by poor grid stability, severe voltage sags, power surges, and extreme ambient thermal variations that typically induce rectifier burnout or nuisance tripping. Its dynamic power derating and intelligent thermal throttling eliminate catastrophic shutdowns, while robust autonomous bus sharing prevents circulating currents in large parallel arrays.
Ideal for 4G/5G macro and outdoor distributed base stations, telecom central offices, edge data center 48V DC buses, utility substation automation SCADA equipment, and industrial-grade battery backup charging systems.
| Key specifications | Value |
|---|---|
| AC Input Voltage | 80V AC ~ 300V AC |
| Rated Output Voltage | -48VDC (-42V ~ -58V) |
| Maximum Output Current | 50A |
| Rated Output Power | 2900W |
| Maximum Efficiency | ≥ 95.5% |
| Operating Temperature Range | -40°C ~ +75°C |
| Cooling System | Forced Air Cooling with Intelligent Speed Fan |
| Hot-Swappable Support | Yes (Live Hot-Pluggable / Plug-and-Play without Power Interruption) |
Delta
Engineered with dual DSP digital architecture and an advanced LLC resonant conversion topology, the rectifier attains peak energy efficiency exceeding 96.2%. It integrates an active power factor correction (PFC) stage, intelligent variable-speed forced-air cooling, and full N+1 parallel hot-swap capability, offering industry-leading power density and carrier-class MTBF in harsh utility grid conditions.
Engineered with advanced DSP digital control and an LLC resonant soft-switching topology, this module delivers over 96% peak power conversion efficiency, ultra-wide AC input tolerance, intelligent thermal fan control, and true hot-swappable N+1 parallel redundancy for uninterrupted telecom operations.
Featuring advanced digital signal processing (DSP) control and optimized resonant switching topologies, this rectifier delivers peak efficiency exceeding 96%, dramatically lowering thermal overhead and utility OPEX. It incorporates an intelligent, temperature-controlled forced-air cooling system capable of continuous operation across an ultra-wide ambient temperature window of -40°C to +75°C. With active autonomous load sharing, N+X modular redundancy, and carrier-grade galvanic isolation, the ESR-48/60 AA ensures zero-downtime reliability for Tier-1 network deployments.
Engineered with an industry-leading peak efficiency of ≥95.0%, the ESR4840AC features advanced resonant power topologies, full digital signal processing (DSP) control, and an intelligent variable-speed cooling fan. Operating across a wide -40°C to +75°C temperature envelope, it provides carrier-grade reliability, live hot-pluggability, and precise active load sharing for N+1 redundant telecom power solutions.
