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Zhongheng NPR48-3G Genuine Telecom Hardware Shot 3
ZhonghengModel: NPR48-3G

Zhongheng NPR48-3G 3rd Gen High-Efficiency Telecom Switch-Mode Rectifier (48V 37.5A 1800W)

The Zhongheng NPR48-3G is a carrier-grade, 3rd-generation high-frequency switch-mode telecom rectifier module engineered for -48V DC power systems, delivering a rated output of 48V DC (nominal 53.5V DC, adjustable from 42V to 58V DC) with a maximum current of 37.5A and an output capacity of 1800W.

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Rated Output Voltage
-48VDC (-42V ~ -58V)
Maximum Output Current
37.5A
Rated Output Power
1800W
Maximum Efficiency
≥ 93.5%
AC Input Voltage
85V AC ~ 300V AC
Operating Temperature Range
-40°C ~ +75°C

What this product is

What this product is

Architecturally, the NPR48-3G utilizes a two-stage conversion topology combining a Continuous Conduction Mode (CCM) Boost PFC front-end (achieving PF > 0.99 and ultra-low THD) with an isolated zero-voltage-switching (ZVS) resonant DC-DC stage. Governed by high-speed digital signal controllers (DSP/MCU), it interfaces seamlessly with power system controllers via CAN/RS485 buses, supporting autonomous float/equalize battery charging, telemetries, and carrier-standard EMC/safety compliance.

What problem it solves

The NPR48-3G eliminates frequent downtime and power supply failures caused by unstable utility grids, extreme voltage sags, and transient line surges in remote or emerging regions. Its autonomous active current sharing prevents circulating currents and thermal overloading across paralleled arrays, while hot-swap capability eliminates network outages during routine maintenance and system expansions.

Who and where it is for

Ideal for wireless base stations (macro/micro BTS for 4G/5G), outdoor integrated telecom enclosures, central office transmission nodes, optical access networks (FTTx/OLT), and industrial automation control centers requiring uninterrupted 48V DC power.

Core advantages

  • Wide AC input voltage range (85V-300V) with active PFC ensures robust grid adaptability and low THD.
  • Advanced ZVS resonant topology and DSP digital control deliver high conversion efficiency exceeding 93.5%.
  • Supports hot-swapping and precise high-speed CAN/RS485 digital current sharing for reliable multi-module parallel operation.
  • Features intelligent variable-speed cooling fans and comprehensive telecom-grade protections for harsh environments.

Technical specifications

Key specificationsValue
Rated Output Voltage-48VDC (-42V ~ -58V)
Maximum Output Current37.5A
Rated Output Power1800W
AC Input Voltage85V AC ~ 300V AC
Maximum Efficiency≥ 93.5%
Operating Temperature Range-40°C ~ +75°C
Cooling SystemForced Air Cooling with Intelligent Speed Fan
Hot-Swappable SupportYes (Live Hot-Pluggable / Plug-and-Play without Power Interruption)

Applications

01

Cellular base station BBU/RRU power feed and backup VRLA/LiFePO4 battery charging

02

Outdoor telecom cabinets for broadband optical access nodes (FTTH/OLT/ONU)

03

Electric utility substations and railway signaling continuous -48V DC supply frames

04

Data center network equipment distribution racks and edge-computing telecom shelters

Frequently asked questions

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