China Professional Surge Protective Device SPD Manufacturer
What is a Surge Protective Device SPD?
Surge Protective Device SPD, also known as a surge protector or lightning protection device, is designed to protect electrical systems, equipment, and control circuits from lightning strikes and transient overvoltage.
XENHO is a professional Surge Protective Device SPD manufacturer providing Class I, Class II, Class III, AC and DC surge protectors, widely used in building power distribution systems, industrial automation, solar photovoltaic (PV) systems, data centers and communication systems.
Classification by Lightning Protection Level
1. Class I SPD (T1 / 10/350μs)
Designed to discharge direct lightning current
Installed at main distribution boards, transformer low-voltage side
Key Advantages:
Extremely high surge current capacity
Suitable for primary protection
2. Class II SPD (T2 / 8/20μs)
Protects against induced lightning and switching surges
Installed at distribution cabinets, floor distribution boxes
Key Advantages:
High cost-performance
Widely used in buildings and factories
3.Class III SPD (T3 / Combined Wave)
Provides fine protection for sensitive equipment
Installed at socket outlets, UPS systems
Key Advantages:
Low residual voltage
Fast response time
Classification by Power Supply System
1. AC SPD
Voltage: 220V / 400V / 690V
Used in residential buildings, commercial facilities, industrial systems
2. DC SPD
Voltage: 600V / 1000V / 1500V
Used in solar PV systems, EV charging stations, energy storage systems
Classification by Number of Poles and Wiring Method
1P / 1P+N: Residential single-phase protection
2P: Enhanced safety for single-phase systems
3P: Industrial three-phase equipment
4P: Full protection for three-phase four-wire systems
Compatible with:
TN-S
TN-C-S grounding systems
Classification by Function and Structure
Voltage Switching SPD
High surge capacity
Used in Class I protection
Voltage Limiting SPD (MOV Type)
Automatically limits voltage spikes
Mainstream for Class II & III
Composite SPD
Combines both technologies
Higher protection performance
Classification by Installation Method
DIN Rail SPD (standard installation)
Panel-mounted SPD
Outdoor SPD (IP65+)
Classification by Application Scenarios
Building SPD: Residential, office, shopping mall
Industrial SPD: Machinery, motors, automation systems
Data Center SPD: Servers, UPS, communication systems
PV SPD: Solar energy & energy storage
Railway & Telecom SPD: High-stability environments
How to Choose the Right SPD?
When selecting an SPD, consider:
Lightning protection level (T1 / T2 / T3)
Voltage system (AC or DC)
Installation location
Required discharge capacity (kA)
Number of poles (1P, 2P, 3P, 4P)
- View as
DC Lightning Surge Arrester
XENHO is a specialized manufacturer of DC Lightning Surge Arresters in China, dedicated to providing efficient and safe DC surge protection solutions for solar energy systems. Our DC Lightning Surge Arresters feature exceptional response speeds and weather resistance, finding widespread application in photovoltaic power stations, distributed energy systems, and off-grid power generation systems.
600v DC Surge Protective Device
As a professional manufacturer of DC surge protective devices in China, XENHO introduces its 600V DC Surge Protective Device—specifically designed for photovoltaic power stations, distributed energy systems, and off-grid power generation systems. Utilizing high-performance Metal Oxide Varistor (MOV) technology, this device features rapid response times, low residual voltage, and high surge current capacity, ensuring stable operation even under extreme climatic conditions.
XENHO as a professional manufacturer and supplier of quality Surge Protective Device SPD in China. With our own factory, we provide customized services and look forward to partnering with you.
