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The TH400X Series is a high-frequency switching power supply module specifically designed for fire protection systems. Developed by Tonghe Electronic Technology Co., Ltd., this module adopts advanced resonant voltage-type dual-loop control technology, ensuring high efficiency, compact size, and reliable performance. With a nominal output voltage of 400V DC and a built-in standard RS-485 interface, it supports seamless integration into automated monitoring systems, making it an ideal power solution for fire safety and related critical applications.
Product Advantages
Modular design with N+1 hot redundancy for flexible and scalable power capacity
High efficiency of up to 94%-96%, with passive power factor correction (PF ≥ 0.88)
Comprehensive protection including overvoltage, overcurrent, short-circuit, and overtemperature safeguards
Intelligent control via RS-485 communication, enabling remote monitoring, adjustment, and synchronization
Supports plug-and-play installation and easy maintenance without system downtime
Clear LED display and user-friendly interface for real-time voltage, current, and fault status indication
Application Scenarios
This power supply module is primarily designed for fire protection systems, ensuring uninterrupted and stable power to critical fire safety equipment. It is also suitable for various industrial and commercial applications requiring reliable DC power, such as emergency lighting, security systems, communication infrastructure, and other automated facilities where remote monitoring and high system availability are essential.
Model Comparison
Model
400X03ZZ
400X05ZZ
400X07ZZ
Output Current (A)
3
5
7
Output Power (KW)
1.3
2.2
3.2
Weight (kg)
5
9
9
Input Power Factor
≥0.91
≥0.88
≥0.88
Technical Specifications
Cooling Method: Natural cooling
Heater Temperature Rise: ≤35℃
Input Voltage Range (VAC): 323-437VAC (380VAC representative)
Output Adjustable Range (VDC): 300-450VDC (405VDC representative)
Regulation Accuracy: ±0.5%
Steady Flow Accuracy: ±1%
Charger Efficiency: ≥94%
Default Uniform Charging Voltage: 423VDC
Default Float Voltage: 405VDC
Maximum Audible Noise: 50dB
Storage Temperature: -40℃ to +60℃
Working Environment Temperature: -10℃ to +45℃
Parallel Current Imbalance: ±5%
Delay: 3-8 seconds
Ripple Factor: ≤0.5%
Grade of Load: Continuous operation at the rated output current of Level I (100%)
Protection Features
Automatic Rate Limiting: When the output current exceeds the set current limit, the system maintains constant current output without increasing the current
Overvoltage Protection: The output will automatically stop if the voltage exceeds 480±20VDC to prevent equipment damage
Output Short Circuit Protection: The module automatically protects itself against damage during output short circuits and resumes operation after fault resolution
Note: The voltage regulation accuracy excludes the effect of the built-in isolation diode.
Product Images
Why Choose Tonhe?
We are a high-tech enterprise integrating manufacturing, sales, system solutions, and after-sales service. With over 290 successful projects for 220 kV to 500 kV substations and battery systems above 1000 Ah, Tonhe has become a leading DC power system supplier in China, holding over 40% market share and producing 1 million modules annually. Choose us for exceptional quality, reliable support, and proven value.
Quality Assurance
Our 8 advanced production lines, equipped with imported machinery, achieve 80% automation and up to 99% first-pass yield. All power modules undergo double-sided potting, conformal coating, and rigorous functional, environmental, and aging tests—ensuring reliable 24/7 performance in critical power infrastructures.
Business Support
We provide a full range of power conversion modules, system-level low-voltage DC distribution cabinets for DC loads, data center power systems, as well as customized hardware and software power solutions.
Sample Orders
Yes, you can get sample orders to test our quality. The cost of samples is paid by the customer.
Payment Types
We accept payment via TT (Telegraphic Transfer).
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
1998
Total Annual:
210000000-250000000
Employee Number:
1800~2000
Ecer Certification：
Verified Supplier
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, prov... 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, prov...
