How does the ESR-48/40AC perform when AC input voltage drops below 176V?

The unit features automatic linear undervoltage derating. Between 85V and 176V AC, it delivers continuous DC power with proportional current derating to prevent site outage. For bench test verification, pinout diagrams, and custom warranty terms, contact our engineering desk via WhatsApp +86 17621197907.

How are the float and equalize output voltages adjusted on this module?

In subrack systems, voltages are regulated dynamically via the CSU controller bus. In standalone mode without a controller, the module operates at factory-preset -53.5V float voltage. For bench test verification, pinout diagrams, and custom warranty terms, contact our engineering desk via WhatsApp +86 17621197907.

How to differentiate between an internal overcurrent trip and a cooling fan failure?

A solid red LED indicates output short-circuit or overvoltage lockout. A solid yellow LED paired with a stopped fan indicates fan fault or thermal protection. Confirm exact alarm codes on the supervisory screen. For bench test verification, pinout diagrams, and custom warranty terms, contact our engineering desk via WhatsApp +86 17621197907.

DeltaМодель: ESR-48/40AC

Delta ESR-48/40AC Compact Switch-Mode Telecom Rectifier Module (-48V 40A 2000W)

The Delta ESR-48/40AC is a compact telecom rectifier module delivering -48V 40A (2000W max power), engineered for space-constrained access network sites and micro telecom shelters.

Цена определяется конфигурацией и объёмом проекта

Запросить предложение

Nominal Output Voltage: -48V DC (Adjustable: -42V to -58V)
Rated Output Current: 40A Rated Output
Rated Output Power: 2000W
AC Input Range: 85V to 300V AC (Nominal 220VAC)
Operating Temperature Range: -25°C to +70°C
Cooling & Form Factor: Smart DC Fan / Shallow-Depth Hot-Swap

Что это за продукт

This unit installs into Delta 1U/2U or compact embedded power subracks, converting single-phase AC into telecom-grade stabilized DC for micro station power systems.

Какую задачу решает

Solves space limitation in shallow outdoor enclosures, remote maintenance difficulties, and premature shutdowns caused by unstable utility voltages.

Для кого и каких условий

Engineered for 4G/5G small cells, FTTH optical distribution hubs, railway signaling relay boxes, and industrial embedded power supplies.

Ключевые преимущества

Compact Shallow-Depth Chassis: Reduced depth and light weight facilitate mounting in tight wall-mount boxes and shallow outdoor enclosures.
Wide Utility Grid Adaptability: Operates from 85V to 300V AC, continuing to deliver stable derated power down to 90VAC input.
Arc-Free Hot-Swap & Current Sharing: Plug-and-play design with autonomous parallel load-sharing prevents single-point system outages.
Low Acoustic Noise Profile: Acoustically optimized airflow path ensures ultra-quiet operation compliant with urban residential site requirements.

Технические характеристики

Ключевые параметры	Значение
Nominal Output Voltage	-48V DC (Adjustable: -42V to -58V)
Rated Output Current	40A Rated Output
Rated Output Power	2000W
AC Input Range	85V to 300V AC (Nominal 220VAC)
Operating Temperature Range	-25°C to +70°C
Cooling & Form Factor	Smart DC Fan / Shallow-Depth Hot-Swap