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Power Capacitors
- BY71 Series Cylindrical Capacitor
- BSMJ Series Self-healing Low Voltage Shunt Capacitors
- BY86 Series Controlled Intelligent Capacitor
- BYKXG/F Series Anti-harmonic Intelligent Capacitor
- 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
BYB1-63 Series Miniature Circuit Breaker Series New Type MCB 415V
Parameter of BYB1 Series Miniature Circuit Breaker (MCB)
| Model | BYB1 Series Miniature Circuit Breaker (MCB) |
| Pole | 2 |
| Production level | IP20 |
| Rated Current | 250A |
| Rated Voltage | 415V |
| Operation Temperature | -5℃~+40℃ |
| Average Temperature | ≤ 35℃ |
| Rated Humidity | The relative humidity in the surroundings shall not exceed 50% at an ambient air temperature of +40°C. At lower temperatures, higher relative humidity is allowed. The maximum monthly average relative humidity in the wettest month is 90%, with the average minimum temperature of that month being +25°C. Condensation caused by temperature variations on the product is also permissible. |
| Altitude | ≤2000m |
| Machine Lifespan (times) | 20000 |
| Temperature Protection | All series are equipped with temperature protection |
Overview of BYB1 Series Miniature Circuit Breaker
The BYB1-63 Series Miniature Circuit Breaker (MCB) by Baoyu Holdings Ltd. sets a new benchmark in circuit protection equipment, designed to outperform competitors like Himel miniature circuit breaker in reliability and performance. Engineered for 415V applications, this MCB electrical breaker integrates cutting-edge technology to safeguard circuits against overload short circuit, over voltage circuit fluctuations, and over current circuit conditions. Ideal for industrial, commercial, and residential use, it ensures robust over voltage and under voltage protection alongside over current and over voltage protection, making it a versatile solution for mcb in electrical circuit safety.Unlike standard bad circuit breaker models, the BYB1-63 Series features precision-trip mechanisms to prevent overload outlet risks and complies with AFCI required standards for enhanced fire prevention. Its compact design rivals Himel MCB while delivering superior output protection circuit performance. The breaker supports over and under voltage protection circuit functions, ensuring stable operation even in unstable grid conditions. Compatible with general electric molded case circuit breakers and engineered to replace traditional low oil circuit breaker systems, it offers a maintenance-free, eco-friendly alternative.
For projects requiring higher capacity, Baoyu Holdings—a leader among mccb circuit breaker manufacturers—also supplies cost-effective 250 amp mccb units, competitively priced against standard mccb price ranges. The BYB1-63 Series excels in scenarios where circuit breakers and fuses protect the circuit from thermal/magnetic faults, ensuring seamless integration with mcb electrical infrastructure.Upgrade to the BYB1-63 Series for unmatched durability, compliance with global safety standards, and energy-efficient overload circuit management. Trust Baoyu to deliver smarter, safer power solutions—whether you need miniature circuit breaker precision or heavy-duty mcb in electric circuit stand for reliability. Contact us today to optimize your electrical systems with innovation that outperforms Himel and redefines mcb electrical breaker excellence.
Structural of BYB1 Series Miniature Circuit Breaker
BYB1-63 series miniature circuit breakers adopt advanced modular structure to ensure reliable circuit protection and efficient operation. Its structural components include:
- Contact system: Highly conductive silver alloy contacts are used, with low resistance and strong durability, ensuring stable performance under high current load.
- Arc extinguishing chamber: It adopts multi-gap baffle design and uses high temperature resistant materials to quickly extinguish the arc in the event of a short circuit, minimizing energy loss and improving safety.
- Trip Mechanism: Equipped with thermal magnetic trip system, it can achieve dual protection - overload protection (by bimetallic deflection) and short circuit protection (by electromagnetic release).
- Operating mechanism: Spring energy storage mechanism is used to achieve fast and reliable switching, reduce wear and extend mechanical life (up to 20,000 operations).
- Housing: Made of flame-retardant thermosetting material (UL94 V-0 grade), it has excellent heat resistance and insulation properties, ensuring compliance with international safety standards.
- Installation: Compatible with 35mm DIN rail mounting, can be seamlessly integrated into the distribution board, and comes with optional fork/pin busbar connection for flexible wiring.
Product Features BYB1 Series Miniature Circuit Breake
1. Advanced overload and short circuit protection to enhance electrical safety
The BYB1-63 series miniature circuit breakers (MCBs) integrate thermal-magnetic tripping technology to provide powerful circuit protection and ensure fast response to overloads and short circuits. With a rated current range of 1A to 63A, it is compatible with AC 415V systems and can protect residential, commercial and industrial power grids from overload damage. The thermal element prevents long-term overloads by bending the bimetallic strip, while the magnetic mechanism trips instantly in the event of a short circuit, achieving a high short-circuit breaking capacity of up to 10kA14. This double-acting design complies with the standard, making it ideal for applications such as motor control, lighting systems and switchboards. Its compact modular design can be seamlessly integrated into the DIN rail system, thereby optimizing space within the electrical cabinet. In addition, the MCB's energy-limited Class 3 performance minimizes the risk of arc flash, thereby improving the safety of maintenance personnel.
2. Smart grid compatibility and remote control capabilities
Designed for modern smart grid applications, the BYB1-63 series enables remote tripping and automation with an optional shunt release. This feature can be integrated with IoT-based energy management systems, allowing users to remotely disconnect circuits via wireless signals or a central control panel - critical for demand-side management and emergency shutdowns in industrial environments. The miniature circuit breaker's arc-flash barrier technology ensures safe operation in high-voltage DC environments, such as solar PV systems and battery energy storage systems, where voltages can reach up to 1200VDC. Its IP65-rated housing (optional) is dust-proof and waterproof for harsh outdoor installations. By combining real-time circuit monitoring with adjustable tripping curves (B, C, D types), the miniature circuit breaker can adapt to a variety of load curves, from sensitive electronic equipment (B type) to inductive loads such as transformers (D type).
3. Multiple applications in renewable energy and industrial systems
The BYB1-63 series excels in renewable energy applications, including solar combiner boxes and UPS systems, with its polarity-independent DC protection and 1200VDC rated voltage. Its modular construction simplifies maintenance and expandability, while the flame-retardant PC/PA housing ensures durability in extreme temperatures. For industrial use, this MCB addresses power quality issues such as harmonics and phase imbalance by providing robust overcurrent protection, complying with the standard for harmonic mitigation. International certifications ensure its global market suitability, and its 6000-cycle mechanical life ensures its long-term reliability. Whether deployed in smart cities, data centers or manufacturing plants, this MCB series improves energy efficiency and reduces downtime through precision-engineered circuit interruption capabilities.
Wiring Method of BYB1 Series Miniature Circuit Breaker
Product size information
Appliactions of BYB1 Series Miniature Circuit Breaker (MCB)
Safety and compliance of electrical systems in commercial buildings
The BYB1-63 series excels in commercial buildings where circuit protection and fire safety are critical. Rated at 415V AC, the series is designed for lighting circuits, HVAC systems, and IT infrastructure in offices, malls, and hospitals. Its Type C trip curve (5-10×In) ensures selective coordination with downstream equipment, preventing nuisance tripping while isolating faults in high-demand circuits.In modern buildings integrating renewable energy sources such as solar PV arrays or battery storage, the arc-extinguishing design and optional IP65-rated enclosure of the miniature circuit breaker (MCB) provide reliable performance in harsh environments, reducing the risk of arc flash. For retrofitting older systems, its dual-terminal connection supports both rigid conductors (up to 25mm²) and flexible busbars, simplifying upgrades without rewiring.
Renewable energy systems for solar energy and DC circuit protection
Optimized for photovoltaic (PV) applications, the BYB1-63 series miniature circuit breakers are the cornerstone of DC circuit protection in solar farms and hybrid energy systems. Rated at 1200VDC and in a 2-pole configuration, the circuit breakers protect solar inverters, combiner boxes, and battery packs from overcurrent and short-circuit faults. Their non-polarized design ensures stable performance under bidirectional DC current, which is critical for battery energy storage and grid-connected systems.In large-scale PV installations, the arc-extinguishing barrier and flame-retardant housing of the miniature circuit breaker reduce the risk of fire, and its IP65 protection rating protects against dust and moisture in outdoor environments. For microgrids, the circuit breaker’s compatibility with smart shunt releases enables remote tripping via an IoT platform, enhancing operational flexibility.In addition, BYB1-63 supports reactive power compensation in hybrid systems, stabilizes voltage levels and improves grid synchronization. When used in conjunction with a surge protector (SPD), it provides comprehensive protection against transient surges common in renewable energy installations. It is therefore essential for green energy projects to comply with international standards.
Industrial manufacturing facilities for enhanced circuit protection and energy efficiency
The BYB1-63 series miniature circuit breakers (MCBs) are an ideal solution for industrial manufacturing facilities that require robust circuit protection and stable power distribution. Designed for 415V systems, these MCBs protect heavy machinery, motor controls, and automated production lines from overloads, short circuits, and voltage fluctuations. Their high short-circuit breaking capacity (up to 6kA) ensures reliable interruption of fault currents, minimizing downtime for critical operations.In environments with varying loads, such as CNC machines or welding equipment, the BYB1-63’s thermal-magnetic tripping mechanism provides precise protection by detecting both progressive overloads (via bimetallic strips) and momentary short circuits (via solenoid coils). In addition, its compact, modular design integrates seamlessly into DIN rail switchboards, optimizing space in crowded industrial switchgear.For facilities that focus on energy efficiency, this miniature circuit breaker supports harmonic filtering and reactive power compensation systems. By mitigating harmonic distortion and balancing three-phase loads, it can improve power quality, reduce energy losses, and comply with strict industrial standards such as IEC 60947-27. Its applications include protecting variable frequency drives (VFDs) and ensuring stable operation of sensitive IoT devices in smart factories.
Storage Workshop
Production workshop
Workshop Vedio
Baoyu Holdings Limited - Leader in Power Quality Solutions
Baoyu Holdings Limited is a world-renowned high-tech enterprise focusing on smart grid solutions, harmonic filters, reactive power compensation systems and intelligent circuit protection devices. With more than a decade of professional experience, we provide cutting-edge technologies to optimize energy efficiency, reduce harmonic distortion, and ensure stable power distribution for industrial, commercial and renewable energy applications around the world. We have advanced production facilities that integrate advanced R&D capabilities and strict quality control systems. We cooperate with top universities such as Zhejiang University and Shanghai Jiaotong University to innovate and develop new generation solutions such as active power filters (APFs), static VAR generators (SVGs) and smart capacitors. Our production lines are equipped with intelligent digital testing equipment and patented technologies that meet international standards, ensuring product accuracy and scalability to meet the different needs of customers.
Product Excellence
Harmonic Mitigation and Power Quality Improvement: Ideal for factories, solar/wind farms and heavy industry, our APF and SVG systems eliminate harmonic interference, reduce energy losses and increase grid reliability.
Reactive Power Compensation: Customizable solutions address voltage fluctuations and three-phase imbalance, improving energy efficiency by up to 30%.
Intelligent circuit protection: Smart capacitors and hybrid compensation devices feature real-time monitoring, remote control, and fail-safe mechanisms to minimize downtime.
Global market leadership
Baoyu's products are certified for international markets and serve customers in North America, Europe, Southeast Asia and the Middle East. We have a localized technical support team and have established partnerships with regional distributors to ensure rapid response and customized adjustments according to local grid standards. By participating in global trade fairs and applying digital marketing strategies, we continue to increase our influence in emerging markets such as renewable energy and smart infrastructure.
Why choose Baoyu?
Engineer-driven innovation: Leveraging China's "engineer dividend", we combine cost-effectiveness with world-class R&D to offer competitive prices without compromising quality.
Sustainable Solutions: In line with global green initiatives, our products reduce carbon footprint and operating costs through energy-saving technologies.
Proven track record: Our systems are trusted in critical projects such as ports, airports and mining, demonstrating long-term reliability in extreme conditions.
Business license
High-tech enterprise certificate
ISO management system certification
Corporate honors
Product certification certificate
Product testing report
Company patent certificate
Well-known domestic partners
