In modern electrical systems, electrical equipment is increasingly sophisticated and sensitive, and power surges and voltage spikes have become important hidden dangers threatening the safe operation of equipment. Surge Protector (also known as Surge Protection Device, SPD) is a key protective component designed to solve this problem. Zhejiang C&J Electrical co., ltd. (referred to as C&J Electrical) has in-depth research in the field of Surge Protection Device, and its launched CJ-C40M series surge protector has excellent performance, providing reliable protection for various electrical equipment and power systems.
Core Definition & Basic Function of Surge Protector
A surge protector is designed to protect any device with a standard AC plug from potentially damaging and disruptive power surges, voltage spikes and line noise transferred through an electrical outlet. Think of a surge protector like an insurance policy. Specifically, a Surge Protector is an electrical device that can limit the transient overvoltage in the circuit or on the electrical equipment, conduct and shunt the excessive current caused by the surge, thereby avoiding damage to the electrical equipment caused by the surge.
Power surges and voltage spikes can be caused by various factors, such as lightning strikes, grid switching operations, sudden start/stop of large electrical equipment, etc. These transient voltage fluctuations may reach dozens or even hundreds of times the normal voltage, which will burn out the internal components of the equipment, shorten the service life of the equipment, or even cause equipment failure and fire. The Surge Protection Device can respond quickly when a surge occurs, guiding the abnormal current to the ground, clamping the voltage within a safe range, and ensuring the stable operation of the electrical equipment.
Overview of Surge Protector
Surge Protector is an essential protective component in low-voltage electrical systems, which is widely used in residential, commercial, industrial and other fields. According to the protection level and application scenario, it can be divided into different types such as Type 1, Type 2, Type 3, and Type D. Different types of Surge Protection Device are installed in different positions of the power system to form a multi-level lightning protection and surge protection system.
The core of the Surge Protector is composed of components such as voltage-sensitive resistors, discharge gaps, and TVS tubes. These components have the characteristics of high resistance under normal voltage and low resistance under overvoltage. When the voltage in the circuit is normal, the surge protector is in a high-resistance state and does not affect the normal operation of the circuit; when a surge occurs and the voltage exceeds the safe value, the components quickly turn into a low-resistance state, shunting the surge current to the ground, and clamping the voltage to the safe level. After the surge disappears, it automatically returns to the high-resistance state, waiting for the next protection action.
Core Functions of Surge Protector
As a professional Surge Protection Device, it integrates multiple core functions to form a solid safety defense line for electrical equipment and power systems:
- Surge voltage limiting: Quickly clamp the transient overvoltage in the circuit to a safe range, preventing the overvoltage from entering the electrical equipment and damaging the components.
- Surge current shunting: Conduct the excessive current generated by the surge to the ground through the internal components, reducing the impact of the surge current on the electrical equipment and the power system.
- Line noise filtering: Filter out the line noise in the power supply, improve the quality of the power supply, and ensure the stable operation of the precision electrical equipment.
- Failure alarm & isolation: High-quality Surge Protector is equipped with a failure separation device and a visual alarm indicator. When the protector fails due to overcurrent and overheating, it can automatically separate from the power grid and give an alarm, ensuring the safety of the power system and facilitating timely replacement.
- Continuous protection: After the surge disappears, it can automatically return to the normal protection state, realizing 24-hour continuous protection for the electrical equipment.
C&J Electrical’s CJ-C40M Series Surge Protector: Core Advantages & Product Overview
C&J Electrical’s CJ-C40M series Surge Protector (SPD) is a high-performance Type D surge protection product designed for low-voltage power supply systems. It is suitable for AC 50/60Hz, 380V and below TN-S, TN-C-S, TT, IT and other power supply systems. It can be used as equipotential connection at the interface of LPZ1, LPZ2 and LPZ3 zones. Its design is in line with IEC61643-1 and GB18802.1 standards. The shell is designed to be installed on a 35mm electrical guide rail. The product has a built-in failure separation device. When the surge protector breaks down due to overcurrent, overheating and breakdown, the failure separation device can automatically separate it from the power grid. At the same time, the visual alarm indicates green (normal) and red (fault). The module can be replaced with working voltage. Its core advantages, structural features and technical parameters are as follows:
Core Structural Features & Advantages
- Maintenance-friendly design: The protector unit can be replaced without power failure, which is convenient and efficient, and avoids the impact of power failure on the normal operation of the equipment.
- Strong surge resistance: Can withstand a maximum lightning current impact of 20kA (8/20μS), and has excellent protection performance against strong surges such as lightning strikes.
- Ultra-fast response speed: The operation response time is less than 25 nanoseconds, which can quickly respond to transient surges and avoid damage to electrical equipment.
- Intuitive working status indication: The visual window color indicates the working status of the protection – green means normal, red means fault, which is convenient for users to check and maintain.
- Wide adaptability: Suitable for various low-voltage power supply systems and Type D lightning protection protection, with strong environmental adaptability and stable performance.
- Customizable services: Supports OEM/ODM brand customization services, meeting the personalized needs of different customers and market segments.
Key Technical Parameters
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Parameter
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Details
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|---|---|
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Rated working voltage
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220V/380V/220V
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Maximum continuous working voltage
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275V/385V/320V
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Voltage protection level
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≤0.7/≤1.0/≤1.2/≤1.5
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Nominal discharge current
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5/10kA
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Maximum discharge current
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10/20kA
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Response time
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<25ns
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Test basis
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IEC61643-1
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Access conductor cross-sectional area L/N (mm²)
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6
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Access ground wire cross-sectional area PE (mm²)
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16
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Fuse or circuit breaker selection
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10A/16A/25A
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|
Working environment
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-40~85℃
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Relative humidity
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≤95%
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Installation
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Standard guide rail
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Shell material
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Glass fiber reinforced plastic
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Application Scenarios & Installation Positions of CJ-C40M Series Surge Protector
The CJ-C40M series Surge Protector is suitable for Type D lightning protection protection. It meets GB188021.1-2002 standard and is used for equipotential connection during lightning strikes. It is installed at the junction of LPZ1, LPZ2 and LPZ3 zones. Its specific application scenarios and installation positions include:
- Residential scenarios: Installed in the household distribution box, used to protect household electrical equipment such as air conditioners, refrigerators, televisions, computers, and avoid damage caused by surges such as lightning strikes and grid fluctuations.
- Computer centers: Installed in the distribution system of computer rooms and data centers, protecting precision equipment such as servers, switches, and storage devices, ensuring the safe and stable operation of data and services.
- Information & electronic equipment rooms: Installed in front of information equipment, electronic equipment and control equipment or in the nearest socket box, protecting equipment such as monitoring systems, access control systems, and industrial control equipment.
- Commercial buildings: Installed in the distribution boxes of shopping malls, hotels, office buildings, protecting public electrical equipment such as central air conditioners, elevators, and lighting systems.
- Industrial sites: Installed in the auxiliary electrical system of small and medium-sized factories, protecting production equipment, control cabinets and other equipment, ensuring the normal progress of production.
Why Choose C&J Electrical’s CJ-C40M Series Surge Protector?
In the field of Surge Protector and Surge Protection Device, the CJ-C40M series product from C&J Electrical has obvious competitive advantages:
- Reliable protection performance: With ultra-fast response speed and strong surge resistance, it can effectively resist various surges and ensure the safety of electrical equipment.
- Humanized design: Supports replacement without power failure and has intuitive status indication, which improves the convenience of use and maintenance and reduces maintenance costs.
- Wide adaptability: Suitable for various low-voltage power supply systems and multiple application scenarios, with stable performance and strong environmental adaptability.
- High safety performance: Equipped with a built-in failure separation device, which can automatically isolate from the power grid when it fails, avoiding secondary hazards and ensuring the safety of the power system.
- Customizable services & professional support: Provides OEM/ODM brand customization services; C&J Electrical has a professional technical team that can provide customers with tailored surge protection solutions and comprehensive after-sales services.
Get in Touch
If you have any questions about the CJ-C40M series Surge Protector (SPD), such as product specifications, technical details, customization needs, or bulk orders, please feel free to contact C&J Electrical. Our professional team will provide you with high-quality services and reliable surge protection solutions to ensure the safe and stable operation of your electrical equipment and power system.
Post time: Jan-08-2026