What are the core electrical specifications and derating curve of the Delta DPR 48/50-D?

The module delivers a full rated power of 2900W (50A @ 58V DC) over an input range of 184V–300V AC. Between 90V and 184V AC, it employs linear output derating to prevent brownout shutdowns. Efficiency reaches ≥92.5%, power factor is ≥0.99 under standard load, and total harmonic distortion (THD) remains ≤5%.

How does the module handle shelf integration, communication, and parallel current sharing?

The DPR 48/50-D connects via rear blind-mate connectors to Delta power shelves and interfaces with system controllers (e.g., PSC 3, PSC 1000, or CSU) via CAN bus. It features autonomous active current sharing with an imbalance of less than ±5% between 50% and 100% load. In the event of controller loss, the module safely defaults to its preset standalone float voltage.

What are the environmental ratings and surge suppression capabilities?

Operating temperature spans from -40°C to +70°C (with thermal derating applied above +55°C). High-energy metal oxide varistors (MOVs) provide lightning and transient surge suppression complying with IEC 61000-4-5. The internal PCB assembly features conformal coating to resist humidity (5%–95% RH non-condensing), dust, and industrial pollutants.

DeltaModel: Delta DPR 48/50-D

Delta DPR 48/50-D 48V 50A 2900W Telecom Rectifier Module

The Delta DPR 48/50-D is an industrial-grade, 1U hot-swappable telecom rectifier power module engineered for carrier-grade -48V DC power distribution systems, delivering 2900W (50A) nominal output with ≥92.5% efficiency, active power factor correction, and an ultra-wide 90V to 300V AC input voltage range.

Pricing is confirmed by project configuration and quantity

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Rated Output Power: 2900W (50A @ 58V DC)
Nominal DC Output Voltage: 42V DC ~ 58V DC (Nominal 53.5V DC)
Rated Output Current: 50A Continuous Heavy Duty Output
AC Input Voltage Range: 90V AC ~ 300V AC
Power Conversion Efficiency: ≥ 92.5%
Cooling Method: Built-in Temperature-Controlled Exhaust Fan

What this product is

A 1U rack-mount switch-mode power converter (SMR) featuring high-frequency LLC resonant topology, active PFC circuitry, and integrated micro-controller management for standard telecom power shelves.

What problem it solves

Eliminates system downtime caused by unstable rural grid voltages (supports brownout operation down to 90V AC), minimizes rack footprint with 1U high power density, and prevents single-point failure via robust autonomous current sharing.

Who and where it is for

Cellular wireless macro sites, 5G distributed power enclosures, central office optical transmission nodes, and enterprise-grade critical DC backup power plants.

Core advantages

Robust 2900W / 50A DC output with adjustable 42V to 58V float/boost charging range
Wide input range of 90V–300V AC with seamless derating protection against grid instability
Compact 1U modular design with blind-mate connectors for rapid, tool-less hot swap
Microprocessor-controlled variable-speed intelligent cooling fan for extended component life

Technical specifications

Key specifications	Value
Rated Output Power	2900W (50A @ 58V DC)
Nominal DC Output Voltage	42V DC ~ 58V DC (Nominal 53.5V DC)
Rated Output Current	50A Continuous Heavy Duty Output
AC Input Voltage Range	90V AC ~ 300V AC
Power Conversion Efficiency	≥ 92.5%
Cooling Method	Built-in Temperature-Controlled Exhaust Fan
Physical Dimensions Spec	1U Standard Height Compact Plug-in Design mm
Operating Temperature	-40°C to +70°C

Applications

Delta PSC / CSU based modular telecom power plant racks

Outdoor telecom BTS integrated power cabinets and microwave repeaters

Edge computing data centers and optical line terminal (OLT) DC plants

Substation automation and railway signaling backup power systems

Frequently asked questions

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DeltaModel: Delta DPR 48/50-G

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