Intelligent Universal Circuit Breaker Manufacturer

 Product Description:
1. Core protection capability
Overload protection: Equipped with a built-in thermal magnetic trip system, it accurately senses the overload current of the circuit. When the current continues to exceed the rated value, the thermal element slowly heats up and triggers the trip, avoiding long-term overheating and aging of the circuit;
Short circuit protection: The electromagnetic trip module responds in milliseconds (≤ 0.1s), instantly disconnects when the short-circuit current reaches the threshold, blocks the spread of arc, and prevents serious accidents such as distribution box burning and equipment explosion;
Optional extended protection: Some models support under voltage, over voltage, and ground fault protection, suitable for precision equipment with high power supply quality requirements (such as PLC, frequency converter).
2. Industrial grade durability
Contact system: using silver alloy contacts, wear-resistant and arc resistant, with a breaking frequency of over 10000 times, and long-term high-frequency operation without failure;
Shell material: flame-retardant engineering plastic, impact resistant, high temperature resistant (able to withstand short-term high temperatures of 120 ℃), suitable for complex environments such as factory workshops and outdoor distribution boxes;
Sealed design: IP30 protection level, dust-proof and splash proof, to prevent dust and water vapor from entering the interior and causing short circuits.

 User Value
Cost reduction: Avoid equipment burnout and production line shutdown caused by short circuits/overloads, and reduce maintenance and shutdown losses;
Worry free: industrial grade durability+multiple protections, no need for frequent maintenance, long-term stable operation;
Compliance: Complies with national standards such as GB/T 14048.2 and meets the requirements of power distribution specifications for industrial safety production.

Installation and maintenance recommendations
Before installation, confirm that the voltage/current of the circuit matches the parameters of the circuit breaker, and the three-phase wiring should correspond to the phase sequence;
The drawer type model should ensure that the drawer is in close contact with the cabinet to avoid virtual connection and heat generation;
Check the contacts and wiring terminals every six months, clean the dust, and avoid excessive contact resistance;
After short circuit breaking, the contact status should be checked, and if there is erosion, it should be replaced in a timely manner.

Technical details:
 
This molded case circuit breaker is designed specifically for high load industrial/commercial distribution scenarios, using a thermal magnetic trip structure to achieve precise overload protection at 100A rated current and a maximum short-circuit breaking capacity of 50kA. Suitable for 400V three-phase circuits, the IP30 protective casing can withstand dust/splash erosion in complex environments such as workshops and computer rooms.

Core advantages:
Dual mode protection: Hot trip responds to overload, magnetic trip quick break short circuit, and bidirectional protection of lines and equipment;
Durability fully extended: silver alloy contacts+flame-retardant shell, supporting over 10000 breaking operations, ensuring long-term stable operation;
Flexible installation: The rail type design is compatible with standard electrical cabinets, supports drawer/fixed installation, and adapts to different distribution layouts.
Applicable scenarios: Factory distribution cabinets, commercial building HVAC systems, elevator power circuits, photovoltaic inverter front-end protection.
Certification: Complies with international/domestic electrical safety standards such as IEC 60947-2 and GB 14048.2. CE certification

1、 Product Description
Molded case circuit breaker is a low-voltage protection device used to cut off overload and short-circuit fault currents in electrical systems. Its core components are encapsulated in a flame-retardant insulating plastic shell, which combines a sturdy structure and precise protection mechanism, suitable for medium to high current circuits in industrial, commercial, and critical infrastructure scenarios

2、 Core Components and Working Principles
MCCB responds to different types of faults through a hybrid protection mechanism:
Thermal magnetic release unit (standard configuration):
Thermal element: Adopting a bimetallic structure, when continuously overloaded, the bimetallic plate deforms due to temperature rise, triggering delayed tripping (inverse time characteristic: the larger the overload current, the faster the tripping action), which can avoid false tripping caused by motor starting surge current.
Electromagnetic component: Built in electromagnetic coil. In the event of a short circuit fault, the instantaneous increase in current will cause the coil to generate a strong magnetic field, driving the trip mechanism to cut off the circuit in milliseconds and quickly extinguish the arc.
Electronic release unit (advanced configuration):
By collecting circuit current signals through current transformers and comparing them with preset protection curves (overload long delay, short circuit short delay, instantaneous trip) through microprocessors, more accurate three-stage protection can be achieved, and trip parameters can be adjusted as needed.

3、 Key technical parameters
Rated current: The maximum current that the equipment can operate stably for a long time, typically covering 63A to 1600A
Short circuit breaking capacity:
Rated ultimate short-circuit breaking capacity: The maximum short-circuit current that a circuit breaker can withstand (only breaking once, no need to continue using).
Rated short-circuit breaking capacity: the ability to operate normally after breaking the short-circuit current, usually
50% -75% of Icu.
Protection level: commonly IP20 (finger touch resistant) to IP65 (dustproof and waterproof), suitable for different environmental requirements.

4、 Typical application scenarios
Industrial field: Protect high-power equipment such as motors, frequency converters, and machine tools to avoid equipment damage caused by overload/short circuits.
Commercial buildings: used for main protection of medium power circuits such as distribution panels and air conditioning systems.
Key infrastructure: Data centers, hospitals, and other places achieve remote monitoring and selective protection through intelligent MCCBs, reducing large-scale power outages caused by local failures.

The CHM1 series is specifically designed for medium and high voltage circuits and is the core protective equipment for industrial and commercial high-power scenarios: It supports dual voltages of AC400V/690V, with a rated current of 250A, suitable for high-load scenarios. Its 50kA short-circuit breaking capacity combined with overload/surge dual protection; 8kV insulation shock + flame-retardant casing can operate stably at +40℃, with excellent durability; prominent on-off indicators, standard rail installation, and compatibility design for large cross-section cables, make operation and maintenance more convenient. This product is suitable for industrial power equipment, commercial high-power appliances, and infrastructure power distribution circuits, etc. It is a highly adaptable solution for "high load + strong protection + long lifespan" in high-current scenarios, capable of addressing the pain point of insufficient capacity of small-sized circuit breakers, and providing reliable circuit protection for industrial and commercial users.

The CXB7 series of miniature circuit breakers is the core of safety protection for low-voltage circuits in households and businesses. It offers multiple pole specifications including 1P, 2P, and 3P, allowing for flexible adaptation to different circuits such as lighting, sockets, and household appliances based on the number of phase wires. It enables independent protection for single or multiple circuits, preventing local faults from affecting the overall power supply. The rated current of these breakers covers the range of regular loads and adopts a thermal-magnetic dual-break design. During overload conditions, it provides protection for the line through a dedicated component with a slow response, and during short-circuit conditions, the electromagnetic structure instantly cuts off the fault, featuring strong breaking capacity, stable protection, and rapid response. Additionally, it is equipped with a high-grade flame-retardant housing and anti-misoperation terminals to reduce safety risks. The mechanical durability is excellent, making it unlikely to be damaged during long-term operation. It comes with a status indicator light to clearly display the operation status of the circuit. It also supports universal standard rails for tool-free installation, is compatible with various specifications of single or multiple cables, and makes the construction and debugging process more efficient. This product is suitable for various circuit circuits in households, commercial branch lighting, and circuits of small office equipment. It is a "flexible choice" for circuit protection in low-voltage circuits, providing multi-pole adaptation, reliable protection, and convenient installation, offering high-performance, high-adaptability security guarantees for households and businesses.

The CNXE CXB8 series (including the CXB8LE leakage protection model) of miniature circuit breakers are the core of "safety dual protection" for household and commercial low-voltage circuits. They cover two versions: the basic model focuses on overload and short-circuit protection, while the leakage model adds an leakage monitoring function to quickly cut off the leakage circuit, suitable for high-safety scenarios; it also supports multi-pole specification selection, which can match the phase wire configuration of different circuits such as lighting and sockets, achieving independent protection for single or multiple circuits to avoid local faults affecting the overall power supply.
It adopts a dedicated dual-decoupling structure, with a slow response during overload and a instantaneous break during short circuit, and is equipped with high-grade breaking capacity to ensure safety. The leakage model can also accurately identify tiny leakage signals. The high flame-retardant housing + anti-misoperation terminals reduce risks, have strong durability for long-term operation, and come with a status indicator light to make the circuit status clear at a glance. Moreover, it is compatible with universal rails for tool-free installation, supports connections of multiple specifications of cables, and enables efficient and effortless construction and debugging.
This product is suitable for different circuit areas in households, commercial branch lighting, and office equipment protection. It is an "all-round protection choice" for low-voltage circuits, providing dual versions, multi-pole compatibility, and dual-dimensional protection, taking into account both basic and leakage safety needs, and offering high compatibility and reliability of power supply for households and businesses.

The leakage protection circuit breaker is a "leakage protection device" specifically designed for households and commercial environments with high humidity or high-risk electricity usage. It integrates overload / short-circuit protection and leakage protection, meeting the high safety requirements of different circuits: In addition to basic protection, it adds an accurate leakage monitoring function, which can quickly cut off minor leakage circuits, eliminating the risk of electric shock at the source, suitable for damp and high-risk scenarios such as those with many people. At the same time, it offers multiple pole and multiple current specifications for selection, capable of matching the loads and phase line configurations of different circuits, achieving independent protection for single or multiple paths to prevent the spread of faults.
This product is equipped with a monthly test button to regularly verify the leakage function. Its high flame-retardant casing and anti-misoperation terminals reduce risks, and it comes with a clear status indicator to clearly display the circuit status. It also supports universal rails for tool-free installation, supports connections of multiple specifications of cables, and is compatible with most distribution box layouts, making maintenance efficient and effortless.
It is suitable for damp areas in households, commercial kitchen equipment, office public sockets, etc., and is a "necessary safety product" for high-risk electricity usage scenarios. With dual protection, multi-specification compatibility, and detailed safety design, it builds an electricity safety defense line for household and commercial users.

The CHX1-40 surge protector is the "core anti-electricity shock and anti-interference component" of the power distribution system. It is specifically designed to suppress lightning strikes and grid pulses, which are overvoltage shocks. It meets the anti-interference requirements of various circuit scenarios. It has a maximum current capacity of 40kA and a rated current capacity of 20kA. It can effectively absorb instantaneous overvoltages and control the residual voltage within 2.0kV, preventing equipment from being damaged by surges. It adopts a 4-module combined design, compatible with 420V AC systems, and compatible with mainstream power distribution architectures such as three-phase four-wire. It can flexibly match different scale circuit protection needs.
It is equipped with an operating status indicator light to display the working status in real time, and is combined with grounding warnings to ensure the stability of anti-electricity shock. At the same time, it is compatible with standard rail installation and can be embedded in distribution boxes and circuit breakers to work collaboratively. The construction is simple and space-saving. It is suitable for scenarios such as building entry power distribution, commercial facility circuits, and industrial precision equipment circuits. It is a "must-have model" for anti-electricity shock and anti-interference in power distribution systems. With strong current capacity, multi-adaptability, and safe visibility design, it builds a surge protection defense line for various scenarios, avoiding equipment overvoltage damage and improving circuit stability.

A 4-pole (4P) circuit breaker from Chengxi Electric's DZ47-125 series, with a rated current of 63A (Type C tripping curve) and compatible with 400V electrical systems. It features a breaking capacity of 7.5kA, complies with GB/T 14048.2 standards and EC008472 certification. Ideal for overload and short-circuit protection in residential and commercial power distribution systems, it comes with an easy-to-operate ON/OFF toggle switch and fits standard distribution boxes.
The DZ47-125 C63 4P Circuit Breaker from Chengxi Electric is designed to provide dependable overload and short-circuit protection for low-voltage power distribution systems. Suitable for both residential and commercial applications, it supports stable operation in 400V electrical systems where safety and reliability are essential.

Featuring a 4-pole (4P) configuration and a Type C tripping curve, this circuit breaker responds effectively to moderate inrush currents while maintaining consistent protection during normal operation. The rated current of 63A makes it well-suited for common distribution requirements, helping users manage power flow with confidence across everyday electrical installations.

The breaker is built to comply with GB/T 14048.2 standards and holds EC008472 certification, reflecting its adherence to recognized safety and performance requirements. With a breaking capacity of 7.5kA, it is capable of handling typical fault conditions in residential and light commercial environments.

Designed for practical use, the DZ47-125 series features a clear ON/OFF toggle switch that allows easy operation and quick status recognition. Its compact structure fits standard distribution boxes, enabling straightforward installation in new projects or system upgrades. The DZ47-125 C63 4P circuit breaker offers a reliable and user-friendly solution for modern power distribution needs.

The multi - functional Wlfl guide rall meter adopts a rail - type design, which is small in size, compact instructureand simple in installation: it uses an LCD display screento displav current,voltage,electricity, power.freauencland other electrical parameters, is convenient for users to acquire data and easy to operate. It hasgood antielectromaaneticinterference capabilities.meetsvarious needs otoowermanagement.facilitates therealizatiorof terminal - intelligent power metering, and faclitates the retrofitting of power meters in the lateltransformatiorof the lighting system. lt is widely used in commercial squares,science and technology parksuniversities another occasions where biling is reguired, it can also be iointly deploved with energyconsumption monitorinaand energy management systems. its application scope includes property bilingmanagement, electricity meteringnower demand . side manadement, enerav consumotion management andenergy-saving analysis, iner lowvoltage power systems, etc.
The Wlfl multi-functional rail-mounted energy meter is a compact, easy-to-install solution designed for modern energy management. Featuring a clear LCD display, it provides real-time readings of voltage, current, power, frequency, and other essential electrical parameters, allowing users to monitor energy usage conveniently and accurately. Built with strong anti-electromagnetic interference capabilities, it ensures reliable operation even in complex electrical environments.

This smart energy meter is ideal for a wide range of applications, including commercial buildings, shopping centers, technology parks, universities, and other locations where precise energy monitoring and billing are required. It supports terminal intelligent power metering and can be easily integrated with advanced energy management systems, helping businesses and facilities optimize electricity usage and reduce operational costs.

Additionally, the meter is perfect for property billing management, electricity demand-side management, energy consumption monitoring, and energy-saving analysis within low-voltage power systems. Its rail-mounted design simplifies installation and retrofitting, especially in existing lighting and electrical systems, while remote control functionality enhances operational flexibility.

These are din rail energy meters with AC 85-290V 0-40A 0-12KW range They can track voltage current kWh and temperature and have features like over and under voltage protection overtemp protection power-off memory The WiFi model supports app remote control and timing functions They are ideal for home and commercial energy management
The KWS-303 Series DIN rail energy meters are designed for reliable home and commercial energy management. Supporting AC 85–290V and 0–40A with a power range of 0–12KW, these meters accurately monitor voltage, current, kWh, and temperature. Key protection features include over-voltage and under-voltage protection, over-temperature protection, and power-off memory, ensuring safe and stable operation.

The WiFi-enabled model allows remote monitoring and control via a mobile app, including scheduling and timing functions, providing convenience and real-time energy insights. With RS485 communication support, these meters can integrate seamlessly into advanced energy management systems for enhanced monitoring and analysis.

Compact and easy to install on standard DIN rails, the KWS-303 Series offers an efficient, reliable, and smart solution for optimizing energy usage, reducing costs, and ensuring safety in residential, commercial, and industrial environments.

This Tuya WiFi smart protector (model JWGK-63) combines overvoltage/undervoltage/current protection, auto-reclosing, and energy monitoring (voltage/current/kWh). Supports 2.4G WiFi, remote control via Tuya App, adjustable tripping thresholds, and timing functions. AC 130-300V, 0.01-63A range, 1% accuracy. Din rail mountable for home/commercial energy management & electrical safety.
The JWGK-63 Tuya WiFi Smart Protector is a versatile solution for home and commercial energy management, combining overvoltage, undervoltage, and overcurrent protection with advanced energy monitoring. It accurately measures voltage, current, and kWh with 1% precision and supports AC 130–300V and 0.01–63A ranges.

Equipped with auto-reclosing, adjustable tripping thresholds, and timing functions, this smart protector ensures reliable electrical safety while preventing equipment damage. The 2.4G WiFi connectivity allows seamless remote control and monitoring via the Tuya App, giving users real-time insights and convenience. Designed for DIN rail mounting, the JWGK-63 integrates easily into modern electrical systems and smart energy setups.

Ideal for residential, commercial, and small industrial applications, this device provides efficient energy monitoring, enhanced protection, and intelligent management, helping reduce energy waste and maintain a safe electrical environment.