In low-voltage electrical systems, especially in household, office and small industrial scenarios, Mcb Miniature Circuit Breaker is a fundamental and essential protective component. It undertakes the important responsibility of preventing electrical faults and ensuring electricity safety. Zhejiang C&J Electrical co., ltd. (referred to as C&J Electrical) has launched the CJM2-63-II Type Miniature Circuit Breaker, which integrates reliable protection performance and humanized design, providing comprehensive safety guarantee for various low-voltage electrical installations.
Core Definition & Essential Role of MCB Miniature Circuit Breaker
An MCB is an automatically operated electrical switch. Miniature circuit breakers are intended to prevent damage to an electrical circuit as a result of excess current. They are designed to trip during an overload or short circuit to protect against electrical faults and equipment failure. Simply put, Mcb Miniature Circuit Breaker is a “safety gatekeeper” for electrical circuits. It monitors the current in the circuit in real time. When the current exceeds the safe range due to overload (such as connecting too many high-power electrical appliances at the same time) or short circuit (such as wire insulation damage), it will automatically trip to cut off the circuit, thereby avoiding wire overheating, equipment burnout and even electrical fires.
Compared with traditional fuses, Mcb Miniature Circuit Breaker has obvious advantages: it can be reused after tripping (no need to replace the fuse), the tripping is accurate and reliable, and it has clear fault indication. These characteristics make it the first choice for protective components in modern low-voltage electrical systems.
Core Functions of MCB Miniature Circuit Breaker
As a professional automatic protective switch, Mcb Miniature Circuit Breaker integrates multiple core functions to form a solid safety defense line for electrical circuits:
- Overload protection: Equipped with a delayed thermal tripping mechanism. When the circuit is overloaded, the bimetallic strip is heated and deformed to drive tripping, which can distinguish normal current fluctuations and real overload faults, avoiding unnecessary power outages
- Short circuit protection: Equipped with a magnetic tripping mechanism. When a short circuit occurs, the instantaneous large current generates a strong magnetic field, which drives the tripping mechanism to act in milliseconds, quickly cutting off the circuit to prevent the fault from expanding
- Automatic switch function: It is an automatically operated electrical switch that can realize automatic cut-off when a fault occurs and manual reset after the fault is eliminated, which is convenient and quick to use
- Contact position indication: Clearly display the on/off state of the circuit, which is convenient for users to check the circuit status and troubleshoot faults
- Circuit isolation function: After tripping, it can reliably isolate the faulty circuit from the power supply, ensuring the safety of maintenance personnel during inspection and maintenance
C&J Electrical’s CJM2-63-II Type MCB: Core Advantages & Product Overview
C&J Electrical’s CJM2-63-II Type Miniature Circuit Breaker is a high-performance Mcb Miniature Circuit Breaker designed for household, office, other buildings and industrial applications. It protects electrical installations against overloads and short circuits to ensure electrical safety. Once a fault is detected, the miniature circuit breaker automatically switches off the electrical circuit to prevent damage to wires and to avoid the risk of fire. It warrants reliability and safety for people and assets with its dual tripping mechanisms. Its core advantages, structural features and technical parameters are as follows:
Core Structural Features & Advantages
- High short-circuit capacity: 6kA short-circuit breaking capacity, which can reliably handle short-circuit faults and ensure the safety of the electrical system
- Wide current protection range: Designed to protect circuits carrying large current up to 63A, meeting the needs of various low-voltage electrical installations
- Clear contact position indication: Convenient for users to check the circuit status and quickly locate faults
- Versatile application: Can be used as the main switch in household and similar installations, with strong adaptability
- Customizable options: Breaking capacity 6kA/10kA optional; clip foot/handle color customizable; supports OEM/ODM brand customization services to meet personalized needs
- Reliable quality: Complies with IEC60898/EN60898 standards, ensuring stable performance and long service life
Key Technical Parameters
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Parameter
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Details
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|---|---|
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Standard
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IEC/EN 60898-1
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Pole No
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1P, 1P+N, 2P, 3P, 3P+N, 4P
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Rated voltage
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AC 230V/400V
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Rated current (A)
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1-63A
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Tripping curve
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B, C, D
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Rated short circuit breaking capacity (Icu)
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6kA, 10kA
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Rated service short-circuit breaking capacity (Ics)
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6kA, 7.5kA
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Rated frequency
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50/60Hz
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Rated impulse withstand voltage (Uimp)
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4kV
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Connection terminal
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Pillar terminal with clamp
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Mechanical life
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20,000 Cycles
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Electrical life
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4000 Cycles
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Protection degree
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IP20
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Connection capacity
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Flexible conductor 35mm²/Rigid conductor 50mm²
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Installation
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On symmetrical DIN rail 35mm/Panel mounting
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Wide Application Scenarios of CJM2-63-II Type MCB
With reliable protection performance and strong adaptability, the CJM2-63-II Type Mcb Miniature Circuit Breaker is widely used in various low-voltage electrical scenarios, including:
- Household scenarios: Residences, villas, apartments – used for protection of branch circuits such as living rooms, bedrooms, kitchens, and bathrooms (e.g., air conditioners, water heaters, refrigerators and other electrical appliances)
- Commercial office buildings: Offices, shopping malls, hotels – protection of lighting circuits, socket circuits and office equipment circuits
- Small industrial sites: Small factories, workshops – protection of low-power production equipment circuits and auxiliary electrical circuits
- Public facilities: Schools, kindergartens, hospitals – protection of public electrical circuits that require high safety
- Electrical equipment supporting: Matching with distribution boxes, control cabinets and other electrical equipment, used as internal protective switches
Why Choose C&J Electrical’s CJM2-63-II Type MCB Miniature Circuit Breaker?
In the field of Mcb Miniature Circuit Breaker, the CJM2-63-II Type product from C&J Electrical has obvious competitive advantages:
- Dual reliable protection: Equipped with thermal and magnetic dual tripping mechanisms, accurately responding to overload and short circuit faults
- High performance: High short-circuit breaking capacity and wide current range, adapting to complex electrical environments
- Humanized design: Clear contact position indication, convenient installation and maintenance, and customizable options to meet personalized needs
- International standard compliance: Complies with IEC/EN 60898-1 standards, product quality and safety performance are guaranteed
- Comprehensive customization services: Supports breaking capacity selection, color customization and OEM/ODM brand customization, meeting diverse market demands
Get in Touch
If you have any questions about the CJM2-63-II Type Mcb Miniature Circuit Breaker, 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 tailored low-voltage electrical protection solutions to ensure the safe and stable operation of your electrical system.
Post time: Dec-31-2025