TH48D50NZ-S-2 Rectifier Converter Power Module|Charging Rectifier Module

Product Overview
The TH48D50NZ-S-2 is a high-frequency switching rectifier module from TONHE that continuously converts AC mains into a precise 48 VDC bus for charging batteries and powering DC loads. Its 1U-high, front-pluggable design lets you pack 3000 W per slot and scale capacity by simply adding modules.
The module delivers industry-leading ≥96% peak efficiency in an ultra-high-density 1U form factor, supporting AC/DC wide-range input and Modbus communication for exceptional deployment flexibility in demanding applications.
AC/DC wide-range input — operates on 176–264 VAC (45–60 Hz) with linear power derating for low-voltage ride-through.
Constant current / constant voltage charging — automatic current limiting protects the battery and load during bulk charging.
Intelligent monitoring — Modbus (RS485) communication with a local digital display for remote and on-site management.

Specifications

Key Features & Benefits
1.Ultra-High Power Density. Full 3000 W output in a standard 1U rack slot. Add modules to scale cabinet capacity without expanding footprint — ideal for upgrading existing sites.
2.≥96% Efficiency, Low Loss. Peak efficiency above 96% cuts energy cost and cooling load, while standby power stays under 5 W — meaningful savings across a full cabinet.
3.Comprehensive Protection. Short-circuit self-protection with ~40 s auto-recovery, overtemperature auto-restart, automatic current limiting and linear power derating keep loads and batteries safe.
4.Remote Monitoring (Modbus). RS485 Modbus interface enables centralized supervision of voltage, current, temperature and alarms — plug into any compatible DC power system controller.
5.Safe Hot-Swap Design. Front-pluggable and hot-swappable — replace or add modules while the system stays online, cutting MTTR for maintenance crews.
6.Proven Reliability. Backed by TONHE’s 8 production lines with 80% automation and up to 99% first-pass yield; every module passes double-sided potting, conformal coating, functional and aging tests.

Application Scenarios
1.5G & Telecom Base Stations. 48 VDC plants for macro and small-cell sites, delivering reliable battery charging and load power in compact outdoor and indoor cabinets.
2.Data Centers. High-density DC power for servers and network gear, where 1U density and ≥96% efficiency directly lower OPEX per rack.
3.UPS & DC Backup Systems. Integrated rectifier strings in UPS, DC backup and industrial power systems that require precise 48 V charging and seamless parallel redundancy.
4.Infrastructure Upgrades. Replace or add modules in existing cabinets to raise capacity within the same rack footprint — minimal rewiring, maximum headroom.

FAQ
Q: What are the input voltage and output specifications of the TH48D50NZ-S-2?
The module accepts an AC input of 176–264 VAC (typical 220 VAC, 45–60 Hz) and delivers a regulated DC output of 40–58 VDC (typical 48 VDC) at up to 50 A, for a maximum output power of 3000 W. Voltage regulation accuracy is ±0.5%, with a source effect of 0.1% and load effect of 0.5%.
Q: Can multiple TH48D50NZ-S-2 modules be paralleled for higher capacity?
Yes. Parallel operation is supported with a current-sharing imbalance of only ±5%, so you can add modules to scale cabinet capacity. The module also features automatic current limiting — it switches to constant-current operation once the output reaches the set limit — and is rated for continuous operation at 100% of rated load.
Q: What protection features does the TH48D50NZ-S-2 provide?
The module self-protects during output short-circuits and restores automatically about 40 seconds after the fault clears. Overtemperature protection triggers an automatic restart approximately five minutes after the fault clears. Linear power limiting keeps the module delivering power at reduced AC input (≥2600 W at 154 V, 1200 W at 90 V) instead of dropping out.
Q: Does the TH48D50NZ-S-2 support remote monitoring?
Yes. It supports Modbus communication over RS485, enabling remote monitoring and system management through a compatible DC power controller. On the front panel, a digital display with control keys allows local voltage adjustment and status checks. The module also supports safe hot-swap, so it can be maintained without shutting down the system.

Shijiazhuang Tonhe Electronic Technology Co., Ltd. is a high-tech enterprise dedicated to technological innovation, product innovation, and management innovation in the power electronics industry. The company integrates R&D, manufacturing, sales, and service in the power electronics sector, providing customers with comprehensive energy solutions. Founded in 1998, the company was wholly transformed into a joint-stock company in 2012 and successfully listed on the ChiNext Board of the Shenzhen Stock Exchange on December 31, 2015, with stock code 300491. As a highly promising knowledge-intensive high-tech enterprise, the company has maintained steady and sustainable growth. It currently employs over 1,600 people, with R&D personnel accounting for approximately 30% of the workforce. To date, the company has obtained more than 200 patents and over 60 software copyrights.