The Delta ESR-48/60 AA is an industrial-grade, high-power-density telecom switch-mode rectifier module rated for a nominal output of 48V/54V DC, 60A continuous load current, and up to 3200W output power. Engineered for mission-critical telecommunications infrastructure, it converts unstable, wide-range AC utility power into clean, tightly regulated DC power for active telecom loads and precision battery bank charging.
Pricing is confirmed by project configuration and quantity
Request a quoteThe ESR-48/60 AA comprises an active power factor correction (PFC) boost pre-stage, an LLC resonant high-frequency DC-DC isolation stage, and a redundant dual-MCU control board. The AC mains passes through multi-stage common-mode and differential-mode EMI filtering before the PFC stage corrects the power factor to >0.99 and stabilizes the internal high-voltage DC bus. The resonant LLC stage guarantees zero-voltage switching (ZVS) on primary-side MOSFETs and zero-current switching (ZCS) on synchronous rectifiers, yielding low EMI and minimal switching losses. A high-durability blind-mate backplane connector integrates AC input, DC output bus, and CAN/RS485 telemetry into a compact, hot-swappable form factor.
It eliminates unexpected site downtime triggered by severe utility voltage sags, brownouts, and surges in unstable rural or industrial grid zones. Its superior >96% thermodynamic efficiency mitigates thermal congestion in tightly packed telecom shelters, cutting air conditioning power demands. Furthermore, its true live-plug capability and fully autonomous dynamic current-sharing architecture eradicate single-point-of-failure risks, enabling rapid capacity scaling and seamless field servicing without disrupting active telecom payloads.
Ideal for 4G/5G macro cell outdoor cabinets, enterprise edge datacenters, central office transmission nodes, utility substation DC tripping systems, and railway trackside signaling power supplies.
| 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.
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.
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.
