The Delta ESR4840AC is an industrial-grade, high-frequency telecom rectifier module designed to convert standard AC utility power into a regulated nominal 54V DC (adjustable 43V~58V DC) output with a maximum current of 40A and a rated power of 2000W.
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Architecturally, the ESR4840AC comprises a continuous conduction mode (CCM) active power factor correction (PFC) boost stage followed by a high-frequency isolated LLC resonant DC-DC converter. Internal microcontrollers handle high-speed autonomous control loops for low THD (<5%), high power factor (>0.99), robust galvanic isolation, and digital telemetry interfacing with system-level supervisory units via an internal communications bus.
It addresses critical telecom network vulnerabilities, including sudden AC brownouts, high-voltage surges, and thermal overload in outdoor enclosures. By providing continuous operation down to 80V AC (with linear derating) and featuring hardware-level overvoltage clamping and intelligent fan diagnostic control, it prevents system bus outages, battery overcharging, and premature component degradation in poor-grid environments.
Tailored for 4G/5G macro and micro base stations, broadband fixed-access telecom shelters, edge computing racks, railway signaling control racks, and industrial 48V DC backup battery-charging plants requiring seamless parallel expansion.
| Key specifications | Value |
|---|---|
| AC Input Voltage | 80V AC ~ 300V AC |
| Rated Output Voltage | -48VDC (-42V ~ -58V) |
| Maximum Output Current | 40A |
| Rated Output Power | 2000W |
| Maximum Efficiency | ≥ 95.0% |
| 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.
Featuring advanced Active Power Factor Correction (APFC) and high-frequency soft-switching resonance topology, the ESR4850DE achieves a peak conversion efficiency of ≥95.5%. Forced-air cooled by an intelligent variable-speed fan and monitored via digital bus architecture, it supports live hot-plugging for zero-downtime, continuous carrier-grade operation under demanding environmental conditions.
