The Delta DPR4000B-48 is a carrier-grade, subrack-mountable high-power telecom switch-mode rectifier module delivering a nominal 54V DC output voltage, up to 74A continuous current, and 4000W rated output power to support mission-critical DC loads and battery backup systems.
Pricing is confirmed by project configuration and quantity
Request a quoteThe DPR4000B-48 consists of an input differential/common-mode EMI filter, transient surge suppression circuitry, a boost PFC stage, an isolated full-bridge LLC resonant DC-DC converter, and secondary synchronous rectification. Supervised by high-speed DSP controllers, the internal firmware regulates active input current wave-shaping, fast transient response, and active current-sharing bus communications, while feeding operational metrics to subrack controllers via an isolated CAN bus interface.
It eliminates telecom site outages caused by volatile rural grid profiles, extreme harmonic distortion, and deep voltage sags through an ultra-wide input envelope (85V to 300V AC). Furthermore, its intelligent thermal foldback management prevents sudden operational tripping under thermal stress, while true hot-plug modularity mitigates single points of failure without interrupting operational load buses.
5G and 4G macro telecom base stations, edge computing micro-datacenters, central office DC distribution systems, industrial automation DC auxiliary buses, and railway signaling and communication uninterruptible power systems.
| 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 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.
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.
