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Power Capacitors
- BY71 Series Cylindrical Capacitor
- BSMJ Series Self-healing Low Voltage Shunt Capacitors
- BY86 Series Controlled Intelligent Capacitor
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- BY81 Series Intelligent Capacitor
- BY82J Series Anti-harmonic Intelligent Capacitor
- BY89 Series Intelligent Capacitor
- Intelligent Controller Series
- Reactor
- Intelligent Switch Series
- Alternating Current Contactor
- Multifunctional power instruments
- Circuit Breaker
- APF/SVG/SPC Cabinet & Module Series
BYCM1E-125 Series Molded Case Circuit Breaker 250V MCCB Circuit Breaker MCCB Industrial Moulded Case Circuit Breaker 3P Thermal MCCB
Main Datas of BYCM1E-125 Series Electronic Molded Case Circuit Breaker
| Model | BYCM1E-125 Electronic Molded Case Circuit Breaker |
| Rated Current (ln) | 32A |
| Long time setting current (lr1)(A) | 16-32 |
| Poles | 3 |
| Rated Voltage | 250V |
| Rated lmpulse Withstand Voltage | 8KV |
| Rated Short-TimeWithstand Current (KA/1S) | 2 |
| Arc Distance (Upperand Lower)(mm) | 50/0 |
| Rated Ultimate Short-.Circuit Breaking Capacity(lcu)(kA) | 50 |
| Rated Operational Short-Circuit Breaker Capacity(lcs)(kA) | 35 |
Overview of BYCM1E-125 Series Electronic Molded Case Circuit Breaker
Key Functions of BYCM1E-125 Series Electronic Molded Case Circuit Breaker
1. Advanced overload and short circuit protection
BYCM1E-125 Series Molded Case Circuit Breakers offer dual-mode thermal-magnetic protection, combining a bimetallic strip for overload detection (up to 125% of rated current) and a solenoid magnetic release for instantaneous short-circuit interruption (up to 10 times rated current). This design ensures fast response to faults, preventing equipment damage and electrical fires. Ideally suited for industrial applications, it can be seamlessly integrated into low-voltage power distribution systems, providing robust circuit protection against surges and sustained overloads. Keywords: Circuit Breaker, Circuit Overload, Molded Case Circuit Breaker, Circuit Protection.
2. Three-phase system compatibility
Designed with a 3-phase configuration, this molded case circuit breaker (MCCB) excels in balancing and protecting three-phase power systems, which is critical for industries such as manufacturing and utilities. It mitigates phase imbalance issues and ensures stable voltage distribution across all phases while preventing phase loss and undervoltage conditions. The thermal release can be adjusted to suit different load requirements, making it suitable for inductive loads such as motors. Keywords: three-phase circuit breaker, three-phase protection, voltage overload, molded case circuit breaker (MCCB).
3. Intelligent monitoring and remote control
BYCM1E-125 is equipped with IoT-enabled sensors that monitor current, voltage, and temperature in real time through a dedicated mobile app or cloud platform. Users can set custom trip thresholds, receive instant alerts of abnormalities, and remotely operate the circuit breaker, reducing downtime and maintenance costs. This smart feature meets the needs of modern industrial automation. Keywords: smart circuit protection, remote monitoring, molded case circuit breaker, circuit breaker.
4. High breaking capacity and reliability
Rated at 250V and 125A maximum, this molded case circuit breaker can handle high fault currents up to 85kA (ICU), ensuring safe disconnection without damage. It features a flame-retardant housing and corrosion-resistant terminals to withstand harsh industrial environments. Compliance with UL, IEC and CE standards ensures global suitability and durability. Keywords: molded case circuit breaker, industrial circuit breaker, high breaking capacity, molded case circuit breaker.
5. Easy to install and maintain
The compact 3P design (DIN rail mountable) simplifies panel integration, while modular accessories (auxiliary switch, shunt release) enable flexible system expansion. Clear trip indication and quick release mechanism facilitate troubleshooting and shorten repair time. Its plug-and-play design minimizes installation complexity for electricians. Keywords: Industrial Molded Case Circuit Breaker, Easy Installation, Molded Case Circuit Breaker, Circuit Breaker
6. Voltage overload and surge protection
The BYCM1E-125 has a built-in voltage-sensitive relay that detects overvoltage conditions (±10% deviation) and disconnects the circuit to prevent equipment from burning out. This is critical in areas with unstable power grids or sensitive mechanical equipment. The breaker's thermal-magnetic design also suppresses transient voltage spikes, enhancing system resilience. Keywords: voltage overload protection, miniature circuit breaker (MCB), molded case circuit breaker (MCCB), circuit protection.
Working Principle of BYCM1E-125 Series Electronic Molded Case Circuit Breaker
BYCM1E-125 series is an advanced molded case circuit breaker (MCCB) designed for industrial and commercial applications, providing reliable overload, short circuit and voltage fluctuation protection. As part of Baoyu Holdings' intelligent full-control product line, this 3P thermal fuse MCCB combines advanced technology with humanized design to ensure optimal power quality and circuit safety.
Main features and working principle
1.Dual protection mechanism
MCCB uses a thermal-magnetic tripping system to solve overload and short-circuit problems:
- Overload protection: A bimetallic strip inside the circuit breaker detects sustained overcurrent. When the current exceeds the rated value, the bimetallic strip heats up and bends due to the difference in thermal expansion, triggering the trip mechanism and disconnecting the circuit.
- Short-circuit protection: When a sudden high fault current (10-12 times the rated current) is detected, the electromagnetic coil immediately activates the tripping mechanism, ensuring a fast interruption within milliseconds.
2. Intelligent full control design
BYCM1E-125 is equipped with an electronic trip unit that supports adjustable tripping parameters (e.g. overload setpoint, short-circuit sensitivity) for precise customization to each application. This intelligent feature ensures compatibility with modern power systems and reduces downtime by minimizing nuisance tripping.
3. Three-phase protection
The 3P configuration provides comprehensive protection for three-phase circuits and is ideal for industrial machinery, motor control centers (MCCs), and commercial buildings where balanced power distribution is important. It prevents phase-to-phase and phase-to-ground faults, ensuring stable operation of three-phase equipment.
4. High breaking ability
With a rated short-circuit breaking capacity (Icu) of up to 50kA at 400V AC, the BYCM1E-125 can reliably interrupt high fault currents, preventing potential hazards such as equipment damage and arc flash events.
5. Voltage overload protection
MCCBs have an undervoltage trip function (undervoltage protection) that disconnects the circuit when the voltage drops below a critical threshold, protecting sensitive equipment from damage caused by voltage instability.
Product Size of BYCM1E-125 Series Electronic Molded Case Circuit Breaker
Advanced flame retardant materials to ensure safety
BYCM1E-125 series molded case circuit breakers are made of PA66 reinforced material with 35% glass fiber and red phosphorus-based flame retardant, which has excellent fire resistance and structural integrity. This material combination achieves UL94-V0 flame retardancy and can withstand 850°C glow wire test (GWFI: 850/3.0), ensuring that the circuit breaker remains stable even in extreme overload or short circuit conditions. Unlike traditional thermoplastics, this high-performance composite material is not easy to melt, drip and deform at high temperatures, thereby minimizing the risk of fire in industrial environments.The corrosion resistance of the housing further enhances durability. The housing is treated with a graphene-nickel composite coating that resists salt spray, moisture and chemical corrosion, making it ideal for harsh environments such as coastal power plants or chemical processing plants. This design ensures that the molded case circuit breaker remains fully functional over a temperature range of -25°C to +60°C, far exceeding industry standard tolerances.
Precision thermal magnetic tripping for immediate response to faults
The heart of the BYCM1E-125 series is its dual-mode thermal-magnetic tripping mechanism, designed to detect and interrupt faults in less than 2 milliseconds. The thermal element, consisting of a bimetallic strip, responds to sustained overloads by bending and triggering the tripping mechanism; while the magnetic coil trips instantaneously during a short circuit, providing 80kA short-circuit breaking capacity. This dual protection provides comprehensive coverage for both gradual overheating and catastrophic current surges.Adjustable trip settings for molded case circuit breakers (MCCBs) allow users to tailor protection thresholds to specific loads, reducing nuisance trips in sensitive applications. For example, in motor control circuits, thermal elements can be calibrated to withstand starting surge currents while still protecting against long-term overloads. Arc chute assemblies feature ferromagnetic plates that effectively suppress arcs during interruption, extend contact life, and maintain stable performance over 10,000 operations.The BYCM1E-125 series complies with standards, ensuring reliable performance in international markets. Its smart diagnostics (via optional auxiliary contacts) monitor tripping events in real time, simplifying predictive maintenance and reducing operational risks.
Modular design for unparalleled flexibility and efficiency
The BYCM1E-125 series features a plug-and-play modular architecture that simplifies installation and maintenance. Its removable trip unit and interchangeable accessories (such as auxiliary switches, shunt trip coils) enable quick field upgrades without replacing the entire circuit breaker. Compared to traditional fixed molded case circuit breakers, this design can reduce downtime by 70%, which is critical for industrial applications where continuity is important.The 3P configuration supports three-phase systems, balancing load distribution and preventing phase imbalance issues. Its wide voltage compatibility (250V AC) ensures its suitability for low-voltage distribution networks and motor control centers. The MCCB's screw terminal connections provide secure, vibration-resistant wiring, while the IP54-rated enclosure prevents dust and water intrusion, enhancing operational safety in harsh environments.For retrofit projects, the BYCM1E-125 Series can be seamlessly integrated with existing switchgear via DIN rail or panel mounting options. This adaptability eliminates the need for costly system overhauls, making it a cost-effective choice for upgrading aging infrastructure.
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Baoyu Holding Co., Ltd
Baoyu Holding Co., Ltd. was founded in 2015 and is located in Wenzhou City, Zhejiang Province. The location is excellent and the transportation is convenient. We have very rich industry experience and is a trusted supplier. The company has advanced production equipment and skilled front-line employees. Our company is mainly engaged in the production and sales of power quality products，such as active power filters, static var generators, intelligent capacitors, power capacitors, reactive power compensators, composite switches, capacitor contactors, thyristor switches, reactors. Our company knows that the development of the company depends on the innovation and quality of the products. Therefore, our products have strict quality control from the procurement of raw materials to the sale of finished products. The company has established a quality management system that meets the requirements of the international quality management system. The company continuously releases the original innovations according to the market and customer needs, and always maintains the novelty and innovation of the products. The company wants the customer's thoughts and urgency. Solving problems for customers and meeting customer needs is our eternal pursuit! Our company's products are sold worldwide. The company has won the unanimous recognition of consumers with satisfactory product quality and perfect after-sales service. We have a professional R & D team. We can accept O E M and O D M.We sincerely welcome friends from all over the world to visit our company and cooperate with us on the basis of long-term mutual benefits. We are looking forward to receiving your enquiry soon.
Our storage facility utilizes precision climate control, automated 3D warehousing (which increases capacity by 200%), and integrated safety systems (including fire suppression, anti-static protocols, and monthly audits) to maintain zero oxidation and ensure product integrity. In addition, our cleanroom manufacturing facility features a combination of natural and LED lighting, optimized workflows, and cross-trained technicians to enhance efficiency. Automated quality control systems and ISO-certified processes ensure compliance with dimensional and electrical standards, while AI-driven analytics and stringent protocols help achieve near-zero defects. By integrating advanced automation, tailored solutions, and steadfast reliability, Baoyu provides durable, mission-critical power systems, reinforcing our status as the preferred global partner for industries that require precision and innovation.
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