Product Brief
- Model: TH48T75NZ-S (commonly known as 4875)
- Product Introduction: Tonhe self-developed 1U digital LLC soft-switching rectifier module, AC to 48VDC, rated power 4000W
- Output Spec: 48V, 75A; adjustable output voltage range: 42~58VDC
- Input Spec: Wide AC input 85–300VAC, full power output above 176VAC
- Peak Efficiency: ≥97%, low partial-load loss, reducing site power consumption and cabinet heat
- Power Factor: ≥0.99, THD ≤5%, harmonic performance meets overseas telecom grid requirements
- Mechanical Spec: Standard 1U rackmount, weight ≤2.2kg, high power density to save cabinet space
- Cooling: Intelligent variable-speed air cooling with temperature-controlled fan
- Operating Temperature: -40℃ ~ +75℃, suitable for outdoor cabinets without air conditioning, cold and high-temperature sites
- Parallel Function: Support multi-module parallel connection and automatic current sharing, N+1 redundancy available
- Maintenance: Hot-swap support, modules can be replaced online without load interruption
- Communication Interface: RS485 with Modbus protocol, supporting remote monitoring, parameter configuration and alarm upload
- Protection Functions: Complete protections including input over/under voltage, output overvoltage, short circuit, overcurrent, overtemperature and fan fault protection
- Certifications: CE certified, compliant with telecom safety and EMC standards, suitable for projects in Asia, Africa, the Middle East and CIS countries
Peak efficiency ≥97%, low partial-load loss. Helps operators cut OPEX on electricity for long-running telecom sites, lower heat generation and extend cabinet service life.
Perfect for unstable grids in emerging markets. It can run full 4000W output above 176VAC and derate linearly under low-voltage conditions to keep remote sites online.
4000W within standard 1U rack size, weight ≤2.2kg. Saves precious cabinet space, supports high-density power shelves and easy capacity expansion.
Support online hot swap without power cut. Multiple modules parallel with precise current sharing. N+1 redundancy greatly improves system availability for unmanned outdoor stations.
Built-in intelligent temperature-controlled fan cooling. Suitable for outdoor integrated cabinets, tower-mounted base stations and sites without air conditioning.
Power factor ≥0.99, THD ≤5%. Reduces harmonic pollution and meets most international grid standards.
Standard RS485 communication port. Support remote monitoring, parameter setting, alarm upload. Integrated protections: input over/under voltage, output overvoltage, short circuit, overcurrent, overtemperature, fan fault protection.
| Item | Specification |
|---|---|
| Model | TH48T75NZ-S (4875) |
| Rated Output Power | 4000W |
| Rated Output | 48VDC, 75A |
| Output Voltage Range | 42 ~ 58 VDC (adjustable) |
| AC Input Range | 85 ~ 300 VAC |
| Power Factor | ≥0.99 |
| THD | ≤5% |
| Peak Efficiency | ≥97% |
| Dimension | Standard 1U rackmount |
| Weight | ≤2.2 kg |
| Cooling | Intelligent variable-speed air cooling |
| Operating Temp | -40℃ ~ +75℃ |
| Communication Interface | RS485 |
| Parallel Function | Auto current sharing, N+1 redundancy |
| Maintenance | Hot-swap |
- 5G / 4G telecom base stations, tower sites, outdoor telecom cabinets
- Telecom central office, access network room, enterprise communication room
- Edge micro data center, 48V HVDC power supply system
- Off-grid / weak-grid remote communication stations
- 48V lithium battery backup & energy storage hybrid power system
- Railway, highway monitoring, IoT gateway power supply
Tonhe supplied TH48T75NZ-S 4875 modules for over 800 outdoor telecom power cabinets. The local grid fluctuates heavily; the 85–300V wide input solved low-voltage shutdown issues. N+1 hot-swap design reduced on-site maintenance downtime for unmanned rural towers.
Integrator adopted Tonhe 4875 modules to build high-density 48V DC power shelves for edge computing rooms. High 97% efficiency helped the customer meet local PUE target, stable parallel current sharing for 24/7 continuous operation.
This project replaced old European rectifiers. Tonhe 4875 modules fit the existing 1U cabinet structure, compatible with the original monitoring system via RS485. The -40°C low-temperature capability adapted to cold mountain backbone sites.
Q1: What does “4875” stand for in this rectifier model?
A: 48 means 48V DC output platform; 75 refers to the rated output current 75A. Rated power: 53.5V ×75A ≈4000W. The official model number is TH48T75NZ-S.
Q2: Can this module work with unstable, low AC voltage in remote areas?
A: Yes. Input range covers 85–300VAC. It runs full power above 176VAC and supports linear derating at lower voltage to maintain site operation.
Q3: Does it support hot swap and parallel N+1 redundancy?
A: Supported. Modules can be plugged/unplugged live without cutting load. Built-in automatic current sharing, easy to implement N+1 redundant configuration for high reliability.
Q4: What communication protocol does the RS485 port use? Can it connect to third-party monitoring units?
A: It uses standard Modbus protocol. Compatible with most overseas power monitoring controllers, supporting remote read voltage/current, alarms and parameter configuration.
Q5: What certifications does Tonhe 4875 rectifier have for export?
A: Tonhe TH series rectifiers pass CE, meet telecom safety and EMC standards, widely accepted for Asia, Africa, Middle East, CIS market telecom power projects. We can provide test reports for customer tender review.
