The Delta ESR-48/56B FC is an industrial hot-swappable switch-mode rectifier module employing active PFC and high-frequency soft-switching topologies, engineered to convert AC mains (90V-300V AC) into stable -48V DC nominal output at up to 56A/3000W for mission-critical telecom sites.
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A modular, hot-pluggable power conversion unit featuring high-efficiency conversion stages, comprehensive electrical protection circuits, forced cooling airflow, and a heavy-duty blind-mate backplane connector.
Eliminates grid instability disruptions in remote base stations, mitigates lightning surge damages, prevents load sharing imbalances in multi-rectifier racks, and ensures continuous operation under extreme thermal conditions.
Cellular 4G/5G macro and micro base stations, central office subracks, Distributed Power Systems (DPS), enterprise telecom DC power plants, and railway signaling rooms.
| Key specifications | Value |
|---|---|
| Rated Output Power | 3000W Heavy Duty Output Power |
| DC Output Voltage | -48VDC (-42V ~ -58V) |
| Rated Output Current | 56A Heavy Duty Constant Current Output |
| AC Input Voltage Range | 90V AC ~ 300V AC (Harsh Grid Compatible) |
| Physical Form Factor | Compact Plug-in Metal EMI Shielded Enclosure |
| Power Conversion Efficiency | ≥ 93.5% |
| Cooling Method | Built-in Temperature Controlled Smart Fan |
| Operating Temperature Range | -40°C to +70°C |
Delta
The Delta DPR2900B-48 is an industry-standard 1U hot-swappable telecom rectifier module delivering -48V 50A (2900W) at >95% efficiency, engineered for extreme reliability across global wireless stations.
Carrier-grade industrial high-frequency switch-mode power supply designed for high-efficiency AC/DC conversion, bus regulation, and intelligent battery management.
The Delta DPR4830-D-DCE is an ultra-compact telecom rectifier delivering -48V 30A (1740W), engineered for micro-sites, DAS repeaters, and space-constrained indoor telecom wall boxes.
The Delta DPR4850-D-DCE is a high-density digital AC/DC rectifier converting single-phase AC to clean -48V DC power with active power factor correction and auto
