Q: How does this module handle subrack integration, parallel load sharing, and monitoring protocols?

The module natively fits Delta standard PowerD chassis shelves and 19-inch 1U/3U subracks. Parallel configuration is achieved via an integrated analog active load-sharing bus with an imbalance of less than 5%, supporting high-capacity multi-module systems. Through rear connector digital pins, it interfaces with Delta supervisory controllers (e.g., CSU/PSC series) via CAN or RS485 to report telemetry data and receive float/boost charging profiles.

Q: What environmental and surge protection capabilities does the ESR-48/56CF exhibit?

Designed to meet demanding carrier standards, the unit withstands surges per IEC 61000-4-5 (2kV line-to-line, 4kV line-to-earth). Operating smoothly across -40°C to +70°C (with smart thermal derating above high thresholds), it utilizes industrial conformal-coated PCBA surfaces to resist industrial airborne contaminants, high relative humidity, and salt spray common in outdoor deployments.

Question 1

What are the core electrical specifications and efficiency curves of the Delta ESR-48/56CF?

Accepted Answer

The Delta ESR-48/56CF provides a rated output of 3000W with a nominal -48V DC bus, field-adjustable from 42V to 58V DC, and a maximum rated output current of 56A. It features an active PFC with PF ≥0.99, THD <5%, and efficiency reaching ≥94%. Full power (3000W) is sustained across 176V~300V AC input, while a continuous linear derating curve ensures uninterrupted operation down to 88V AC under weak grid conditions.

Question 2

How does this module handle subrack integration, parallel load sharing, and monitoring protocols?

Accepted Answer

The module natively fits Delta standard PowerD chassis shelves and 19-inch 1U/3U subracks. Parallel configuration is achieved via an integrated analog active load-sharing bus with an imbalance of less than 5%, supporting high-capacity multi-module systems. Through rear connector digital pins, it interfaces with Delta supervisory controllers (e.g., CSU/PSC series) via CAN or RS485 to report telemetry data and receive float/boost charging profiles.

Question 3

What environmental and surge protection capabilities does the ESR-48/56CF exhibit?

Accepted Answer

Designed to meet demanding carrier standards, the unit withstands surges per IEC 61000-4-5 (2kV line-to-line, 4kV line-to-earth). Operating smoothly across -40°C to +70°C (with smart thermal derating above high thresholds), it utilizes industrial conformal-coated PCBA surfaces to resist industrial airborne contaminants, high relative humidity, and salt spray common in outdoor deployments.

Key specifications	Value
Rated Output Power	3000W Rated Output Power
Nominal DC Output Voltage	-48V DC (Adjustment Range: 42V ~ 58V DC)
Rated Output Current	56A Robust Constant Current Output
AC Input Voltage Range	88V AC ~ 300V AC (Ultra-Wide AC Grid Tolerance)
Power Conversion Efficiency	≥ 94% (Industrial Classic High Reliability Efficiency)
Cooling Method	Built-in Smart Speed Controlled Exhaust Fan
Output Power Factor PF	≥ 0.99 (Active Power Factor Correction)
Operating Temperature	-40°C to +70°C

Delta ESR-48/56CF Telecom Switch-Mode Rectifier Module 48V 56A 3000W

What this product is

What this product is

What problem it solves

Who and where it is for

Core advantages

Technical specifications

Applications

Wireless base station power frames (BTS/NodeB/eNodeB/gNodeB)

Central telecom exchange and optical transmission hubs

Substation and railway automation DC backup power infrastructures

Edge computing outdoor micro-data cabinets exposed to severe climate variations

Frequently asked questions

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