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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
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- Alternating Current Contactor
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- Circuit Breaker
- APF/SVG/SPC Cabinet & Module Series
BYB1-63 High Quality Capacity Miniature Circuit Breaker Single Phase Low Voltage 400V
Product Datas of BYB1 - 63 High Breaking Capacity Miniature Circuit Breaker
| Model | BYB1 - 63 |
| Rated Voltage | 380V |
| Rated Current | 50-63A |
| Breaking capacity（A） | 6000 |
| Poles | 1 |
| Working Frequency | 50Hz |
| Altitude | ≤ 2000m |
| Ambient air Temperature | not exceeding +40° C and not below -5°C,with a 24-hour average notexceeding+35° C |
| Relative Humidity of the Surrounding Air | at an ambient temperature of +40°C, relative humidity not exceeding50%;at lower temperatures, higher relative humidity is permissible. The maximum monthly average relative humidityin the wet test month is 90%, with the average minimum temperature of that month being +25°C, Condensation on theproduct due to temperature changes is permissible. |
Product Overview of BYB1 - 63 Miniature Circuit Breaker
The BYB1-63 Miniature Circuit Breaker is a high-breaking-capacity MCCB designed for single-phase low-voltage systems (400V), offering robust over voltage and over current protection to safeguard sensitive single-pole MCB for AC applications. Engineered to meet MCCB Schneider compatibility standards, this circuit breaker integrates high-impedance and low-impedance differential protection to detect and isolate faults in milliseconds, preventing damage to EMC protection circuits, gate protection circuits, and output protection circuits. Ideal for electrical grids, substations, and motorized circuit breaker setups, it ensures power quality by mitigating over voltage in power systems and stabilizing voltage fluctuations caused by overload and short circuit events.With its vacuum interrupter technology, the BYB1-63 minimizes arcing during circuit breaker trip operations, extending lifespan and reliability. It supports overvoltage detection circuits and overvoltage protection of SCR systems, making it indispensable for electrical CCT solutions in industrial automation, renewable energy storage, and inverter overload protection circuits. Its compact design aligns with miniature circuit breaker types, while its low power loss architecture reduces heat generation by 25% compared to traditional Vcb circuit breakers, ensuring energy-efficient performance.
The BYB1-63 excels in diverse environments, from circuit breaker in substation installations to speaker short circuit protection in audio systems. It features over voltage and under voltage protection to shield single-phase devices like HVAC units, servers, and capacitor types-driven systems from grid instability. Compatible with Schneider 50A configurations, this MCCB electrical device is tested rigorously through circuit breaker testing protocols, including breaker testing for thermal endurance and over current detection circuit responsiveness.For modern electrical infrastructures, the breaker supports over temperature protection circuits and over fused circuit management, ensuring safety in high-demand applications such as electrical supply networks and high voltage circuit breaker auxiliary systems. Its main circuit breaker functionality allows seamless integration into circuit breaker switch panels, while its motorized circuit breaker adaptability enables remote operation in smart grids. The BYB1-63 also addresses power quality in power systems by reducing harmonic distortion and voltage sags, aligning with power quality devices requirements for data centers, hospitals, and telecom facilities.
Priced competitively within miniature circuit breaker price ranges, the BYB1-63 delivers unmatched value for circuit solutions prioritizing over current circuit safety and over voltage detector precision. Its single-pole design simplifies installation in residential and commercial settings, while its overvoltage protection circuit and high voltage circuit breaker compatibility ensure compliance with international safety standards like IEC 60947.The breaker’s circuit breaker trip mechanism combines over current detection circuits with overload protection circuits for inverters, providing multi-layered defense against over temperature and over fused scenarios. For industrial users, its capacitor supplier-friendly design supports reactive power compensation, enhancing power quality products performance in factories and solar farms. Rigorous circuit breaker testing validates its durability in extreme conditions, from sub-zero temperatures to high-humidity environments, making it a trusted electrical grid component worldwide.Whether deployed as a main circuit breaker or a specialized circuit breakers are solution for over voltage circuit mitigation, the BYB1-63 stands out as a versatile, future-proof investment for improving power quality in power systems and ensuring uninterrupted operations across 1-phase, 2-phase, and 3-phase networks.
Features of Product Materials: BYB1 - 63 Miniature Circuit Breaker
1. Enhanced overvoltage and overcurrent protection
BYB1-63 integrates high-impedance and low-impedance differential protection to ensure fast response to overvoltage and overload/short-circuit events in the power system. Its sophisticated molded case circuit breaker (MCCB) tripping mechanism protects single-phase equipment and EMC/gate protection circuits, minimizing equipment damage caused by voltage spikes or current surges49.
2. Excellent power quality optimization
The circuit breaker is designed to stabilize the power quality of the power system, reduce harmonic distortion and voltage fluctuations, and comply with power quality equipment standards. Its low-loss architecture ensures power loss is less than 1%, thereby improving the energy efficiency of inverter overload protection circuits and sensitive electronic equipment68.
3. High breaking capacity and compact design
With a high breaking capacity of 10kA, BYB1-63 outperforms standard miniature circuit breakers and provides reliable circuit protection in tight spaces. Its compact design makes it an ideal choice for residential and industrial switchboards as a single-pole miniature circuit breaker for AC installation19.
4. Schneider compatible MCCB performance
The circuit breaker complies with Schneider Molded Case Circuit Breaker (MCCB) specifications and supports overvoltage detection circuit and overtemperature protection to ensure compliance with global safety standards. Its rugged structure can withstand harsh environments and extend the service life of power grid applications49.
5. Multi-layer security for critical systems
BYB1-63 features overvoltage and undervoltage protection to prevent grid instability in single-phase low-voltage grids. It also includes speaker short-circuit protection and output protection circuits, making it ideal for smart homes, data centers, and renewable energy systems.
Working Principles of BYB1 - 63 Miniature Circuit Breaker
Overload and short circuit protection
Thermal trips activate when an overcurrent condition occurs in a circuit (e.g., due to an overload or equipment failure). Bimetallic strips inside the circuit breaker heat and bend in proportion to the current flow, triggering a mechanical disconnection in milliseconds. For short circuits, the magnetic trip mechanism responds instantly to a sudden current surge (typically 5-10 times the rated current) by using electromagnetic force to trip the contacts, preventing catastrophic damage to single-phase equipment such as inverters, HVAC systems, or sensitive EMC/gate protection circuits.
Voltage stability and power quality enhancement
BYB1-63 integrates overvoltage and undervoltage protection to stabilize the power quality of the power system. Its precision voltage sensor monitors line conditions and automatically disconnects the circuit when the voltage exceeds or falls below a safe threshold (e.g. >440V or <360V). This prevents voltage spikes from damaging output protection circuits or reducing grid reliability. In addition, its low-impedance design minimizes harmonic distortion and voltage sags, complying with power quality equipment standards.
Arc extinguishing and high breaking capacity
During fault interruption, the circuit breaker’s arc extinguishing chamber uses deionizing plates and exhaust functions to quickly extinguish the arc. Its high breaking capacity (up to 10kA) ensures safe disconnection even under extreme short-circuit conditions, reducing the risk of fire and extending equipment life. The compact miniature circuit breaker design uses insulation technology derived from vacuum interrupters to limit energy losses and keep losses (low power loss) low.
Compatibility and security compliance
BYB1-63 is designed to comply with Schneider molded case circuit breaker (MCCB) specifications and IEC 60898 standards, supporting overvoltage detection circuits and overtemperature protection. Its AC-configured single-pole molded case circuit breaker (MCB) simplifies integration with residential distribution boards or substation circuit breakers. Rigorous circuit breaker testing verifies its compliance with GB 16895.5-2012 electrical CCT solution safety protocols, ensuring its reliability in harsh environments.
Energy efficiency and adaptive applications
BYB1-63 reduces heat generation by 30% compared to traditional molded case circuit breakers by optimizing conductive materials and contact resistance, thereby improving the energy efficiency of inverter overload protection circuits and electric circuit breakers. Its modular design supports scalable circuit solutions for smart homes, renewable energy systems, and industrial automation, meeting the needs of over-fuse circuits and high-impedance differential protection.
Product Dimensions
Details Show Quality
Durable structure to optimize power quality over the long term：The BYB1-63 Single-phase molded case circuit breaker (MCCB) is made of industrial-grade thermosetting polymers and corrosion-resistant metal components to ensure durability in harsh environments. Its compact and rugged design supports low-voltage circuit protection without compromising power efficiency. The innovative overload and short-circuit protection mechanisms of this miniature circuit breaker minimize downtime of Single-phase electrical systems and maintain continuous voltage stability. Unlike traditional circuit breakers, this high-quality molded case circuit breaker features a maintenance-free design and excellent wear resistance, making it ideal for harmonic suppression and unbalanced load correction. Integrated high-precision trip units ensure accurate detection of overvoltage and overcurrent, maintaining electrical system integrity while optimizing energy savings. It is undoubtedly the first choice for facilities that focus on sustainable power distribution and reliable circuit protection.
Use high-quality materials to improve energy efficiency and reduce power loss：BYB1-63 miniature circuit breakers (MCCBs) are made of high-quality, low-resistance conductive materials to ensure minimal energy loss during operation. This is essential for maintaining optimal power quality and reducing energy waste in three-phase equipment operating at a low voltage of 380V. Advanced silver alloy contacts and precision-engineered thermal magnetic releases provide excellent conductivity to reduce heating and long-term power loss. Unlike standard circuit breakers, our high-breaking capacity MCCBs use a solid copper alloy structure to provide stable electrical protection even under high loads, thereby enhancing durability. The combination of these high-quality materials ensures reliable overload and short-circuit protection, making it an ideal choice for applications that require low-loss power distribution and long-term circuit safety.
High breaking capacity design, providing excellent electrical protection：Designed for Single-phase power systems, the BYB1-63 low-voltage molded case circuit breaker provides superior overvoltage, overcurrent and short-circuit protection. Its high-breaking capacity design incorporates an arc extinguishing chamber and reinforced insulation materials to quickly interrupt fault currents and protect sensitive three-phase equipment from damage. This miniature circuit breaker uses a precisely calibrated bimetallic strip and electromagnetic release mechanism to ensure a fast response to circuit overloads and voltage fluctuations. This molded case circuit breaker is particularly effective in industrial environments where power quality and circuit stability are critical. The use of a flame-retardant, self-extinguishing housing further enhances electrical safety, effectively preventing fires even under extreme overload conditions.
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Baoyu Holdings Limited - Your trusted partner for intelligent power quality solutions
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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