Product Introduction
The TH48D30NZ-S-2 is a 48V/30A, 1750W fan-cooled telecom rectifier module developed by Shijiazhuang Tonhe Electronics Technologies Co., Ltd. (TONHE). Featuring a 1U compact, high-power-density design, it is purpose-built for communications power systems and integrated power systems, delivering a stable 48V DC output (adjustable 40–60VDC) with a rated output current of 30A and maximum output power of 1750W.

The module supports dual AC/DC input (176–264VAC / 176–286VDC) for flexible deployment across diverse power environments, and comes with a standard RS-485 communication interface supporting Modbus and proprietary protocols for easy system integration and intelligent remote monitoring. It complies with the DL/T 1074-2019 standard (DC and Integrated Uninterruptible Power Supply Equipment for Power Use), is certified to CE and ISO9001, and carries a 12-month warranty.

Product Specifications

Product Advantages
1. 1U Compact Design & High Power Density: Standard 1U rack height with 1750W output significantly saves cabinet space.
2. AC/DC Dual Input: Compatible with both 176–264VAC and 176–286VDC for versatile deployment in base stations, substations, and other power environments.
3. High Efficiency & Low Standby Loss: ≥94% conversion efficiency with ≤5W standby power consumption reduces long-term operating costs.
4. Wide-Temperature Reliable Operation: Full-load operation from -10℃ to +40℃, with intelligent derating at high temperatures and dust/moisture protection.
5. Intelligent "Three-Remote" Monitoring: RS-485 interface with Modbus and proprietary protocol support enables remote measurement, remote signaling, and remote control for seamless integration with monitoring systems.
6. Comprehensive Protection: Over-voltage, short-circuit, and over-temperature protection; short-circuit does not damage the module or cause shutdown, and the module auto-restarts approximately 5 minutes after an over-temperature fault clears.
7. Hot-Swappable: Safe online replacement during maintenance ensures uninterrupted system power.
8. High-Reliability Manufacturing: 8 automated production lines with 99% first-pass yield, double-sided potting, conformal coating, and burn-in testing — built for 24/7 critical power applications.

Application Scenarios
- Communications Infrastructure: Base stations, data transmission equipment, and core network rooms requiring 48V DC power.
- Integrated Power Systems (UPS / DC Backup): DC backup systems and integrated AC/DC power cabinets.
- Power / Smart Grid: DC power systems in 220kV–500kV substations and power utility equipment.
- Industrial Control & Monitoring: Space-constrained industrial sites requiring reliable 48V power.
- General-Purpose Compact Systems: Any application demanding high power density, stable 48V output, and flexible input in a standard 1U form factor.

FAQ
Q1: What is the module's output capability? Does it support parallel expansion?
A: Rated output is 48V/30A with a maximum power of 1750W. Multiple modules can be paralleled with current sharing controlled within ±5%, enabling N+1 redundant configurations for higher-capacity communications power systems.
Q2: What protection features does the module have, and how does it recover after a fault?
A: It features automatic current limiting (switches to constant-current mode at the limit point), output short-circuit protection (enters a short-circuit state without shutdown or damage), over-temperature protection (auto-restarts approximately 5 minutes after the fault clears), and over-voltage protection, ensuring safety for both the load and the module itself.
Q3: Does it support hot-swapping? Will maintenance affect power supply?
A: Yes. The module can be safely hot-swapped while the system is running, and with N+1 redundancy, maintenance does not interrupt continuous system power.
Q4: How can remote monitoring and intelligent management be achieved?
A: Via the RS-485 interface supporting Modbus RTU and proprietary protocols, the module reports telemetry and alarm data (voltage, current, temperature, alarms) and accepts remote control commands, enabling easy integration with environment & power monitoring and back-end management systems.
Q5: What working environments is it suitable for? How adaptable is it to grid conditions?
A: Full-load operation from -10℃ to +40℃, storage from -40℃ to +60℃; wide input range of 176–264VAC / 176–286VDC provides strong resilience to grid fluctuations, with ±0.5% voltage regulation accuracy. It is certified to CE and ISO9001 and complies with DL/T 1074-2019.