DC Power Systems for Telecommunications

Introduction
Reliable DC power infrastructure is the invisible backbone of modern telecommunications.
• -48V DC remains the global standard for most telecom sites; HVDC is widely adopted for high-density load scenarios.
• Telecom DC power systems convert unstable AC mains into regulated clean DC power, with battery backup, real-time monitoring and multi-protection functions.
• Network expansion to remote and harsh sites raises higher requirements for efficiency, compact size, intelligence and environmental adaptability.
• Tonhe provides a complete portfolio of telecom DC power solutions built on mature soft-switch power technology.
Tonhe Telecom DC Power Product Portfolio
✅ TH Series Digital Rectifier Modules (Core Product)
• Topology: LLC resonant soft-switch, fully digital control
• Main model: TH48 series 48V rectifier modules
• Highlights:
High power density, lightweight and high conversion efficiency
Wide AC input range, fit for poor grid conditions at remote base stations
Intelligent variable-speed fan cooling, low noise and low idle loss
Full protection: overvoltage, overcurrent, overtemperature and short-circuit lockout
Standard RS485 interface for remote monitoring, parameter setting and fault alarm
✅ Embedded 48V DC Power Systems
• Application: Indoor communication cabinets, outdoor integrated power shelters
• Integrated components: Rectifier shelf, battery management, power distribution branches, intelligent monitoring unit
• Supporting monitoring unit: THJK controller
• Functions:
Touch screen HMI
Battery charge & discharge management
Branch circuit fault detection
Multi-protocol upload, support four-remote management (remote measure, remote signal, remote control, remote adjust)
Centralized visualization, reduce on-site maintenance work
✅ TH-HVDC High-Voltage DC Systems (240V / 336V)
• Target scenarios: 5G core rooms and carrier-grade data centers
• Technology: SiC-based high-efficiency rectifier modules
• Advantages:
Large single-cabinet capacity and outstanding energy-saving effect
Potting process for modules: good resistance to moisture, salt fog and vibration
Suitable for coastal, high-altitude and unattended stations
Compliant with Telcordia and YD/T telecom standards, meets global operator specifications
✅ System Design Advantages
• Redundancy: Support N+1 / N+N redundant configuration. Load auto-sharing when one module fails, no power interruption.
• Hot-swap modular design: Capacity expansion without power cut, easy upgrade with growing network traffic.
• Wide temperature adaption: Outdoor versions work stably under extreme hot and cold conditions, for tower-top, roadside and off-grid base stations.
Conclusion
Telecom operators are facing dual challenges: improving network reliability and lowering OPEX.
• Tonhe DC power systems cover applications from low-power edge base stations to heavy-load data rooms.
• Core strengths: mature soft-switch technology, full digital intelligence and strong environmental tolerance.
• Tonhe does not only supply power hardware, but delivers stable, energy-efficient and easy-to-maintain DC power infrastructure to keep 5G, broadband and voice services running 24/7.
• For global telecom contractors and operators seeking reliable and cost-effective DC power suppliers, Tonhe’s proven telecom power lineup is a trustworthy long-term option.