The Delta ESR4856G is a carrier-grade 1U ultra-high-density switch-mode rectifier module engineered for telecom and industrial DC power plants, delivering a nominal output of 54VDC, 56A continuous current, and 3000W maximum capacity with an energy conversion efficiency reaching 97%.
Pricing is confirmed by project configuration and quantity
Request a quoteThe ESR4856G architecture integrates an advanced input EMI/surge filter, an interleaved continuous conduction mode active PFC stage, and an isolated DC-DC LLC resonant soft-switching converter. A high-performance 32-bit DSP oversees the closed-loop control algorithms, real-time input mains tracking, synchronous rectification driving, and dynamic autonomous current sharing. It accommodates an ultra-wide AC input range, executes automated thermal power derating, and features heavy-duty gold-finger blind-mate connections delivering DC output, auxiliary bias, and CAN bus communications directly to the shelf backplane.
It eliminates DC bus dropouts and communications downtime caused by unstable rural grids, high line surges, and harmonic distortions. The 97% peak efficiency drastically cuts cooling load and thermal dissipation bottlenecks inside dense outdoor cabinets. Furthermore, autonomous active load sharing and hot-plug capability eliminate single-point-of-failure vulnerabilities across mission-critical sites.
5G and LTE macro base transceiver stations (BTS), telecom central offices (CO), edge computing micro-datacenters, railway signaling and trackside communication networks, and industrial high-reliability -48VDC control infrastructure.
| Key specifications | Value |
|---|---|
| Rated Output Voltage | -48V DC (42V~58V) |
| Peak Conversion Efficiency | ≥ 96.0% |
| Operating Temperature Range | -40°C to +75°C |
| Cooling Method | Forced Air Cooling with Intelligent Speed Fan |
| Protection Features | Over-voltage, Short-circuit, Over-temperature, Surge |
| Hot-Swappable Support | Yes (Live Plug-and-Play Support) |
| Total Harmonic Distortion (THD) | ≤ 5% (Total Harmonic Distortion) |
| Rated Power Factor | ≥ 0.99 at Rated Load |
| Standard Compliance & Certifications | CE, UL, RoHS, IEC 60950, EN 300 386 |
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.
