The Delta ESR4856BC is a carrier-grade 3000W single-phase AC-to-DC telecom switch-mode rectifier module, delivering a nominal output of 54V DC (adjustable from 43V to 58V DC) and a maximum output current of 56A with peak energy efficiency exceeding 96.0%.
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Architecturally, the ESR4856BC incorporates Digital Signal Processing (DSP) closed-loop control, a dual-stage bridgeless PFC stage, and an isolated resonant LLC DC-DC converter. It complies fully with IEC/EN 60950-1 safety standards and EN 55022 Class B telecom EMC profiles, leveraging an onboard CAN bus to feed real-time telemetry—including input/output dynamics, internal thermal metrics, and fault logs—to system controllers.
It mitigates common telecom site vulnerabilities including high mains surges, sustained brownouts, phase volatility, thermal de-rating failures, and high carbon footprints. By maintaining tight DC voltage regulation and high power factor (>0.99), it prevents spurious battery cycling, deep-discharge degradation, and unscheduled site outages caused by power conversion failure.
Tailored for 4G/5G mobile base transceiver stations, distributed antenna system (DAS) hubs, central office DC telecom power shelves, industrial automation racks, and hybrid off-grid telecom installations paired with solar and storage systems.
| Key specifications | Value |
|---|---|
| Rated Output Voltage | -48VDC (-42V ~ -58V) |
| Rated Output Power | 3000W |
| AC Input Voltage | 80V AC ~ 300V AC |
| Maximum Output Current | 56A |
| Maximum Efficiency | ≥ 96.0% |
| 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.
