High Quality Circuit Breaker Supplier in China

A circuit breaker is a device used in low-voltage distribution systems to protect circuits. Its function is to automatically and quickly cut off the current when faults such as overload and short circuit occur in the circuit, to prevent wire overheating, equipment damage and even electrical fires, thereby ensuring personal and property safety.

According to their breaking capacity, application scenarios and structural features, they are mainly classified into three categories: miniature circuit breakers, molded case circuit breakers and universal circuit breakers.

Miniature circuit breaker

Miniature circuit breakers are the most fundamental components applied in terminal distribution circuits. The rated current is usually below 63A, and it adopts a standard modular design, supporting quick installation on rails.

Molded case circuit breakers

The casing is made of engineering plastic, with a wide rated current coverage range and higher breaking capacity. This product seals the operating mechanism, contact system, etc. within a plastic casing, providing higher safety and supporting additional modules (such as auxiliary contacts, undervoltage trip units).

Universal circuit breaker

Also known as frame-type circuit breaker (ACB), its rated current can reach over 6300A, featuring extremely high breaking capacity and protection functions. Adopt a modular frame structure.

Comparison and Selection

	Miniature Circuit Breaker	Molded case Circuit Breaker	Universal Circuit Breaker
Current range	≤ 63A	16A - 1600A	630A - 6300A+
Scope of use	Terminal loop protection	Intermediate level/equipment level protection and power distribution	Main incoming line/busbar protection and system management
Selection requirements	Number of circuits, number of poles, and instantaneous tripping characteristics	Load type, breaking capacity, and whether accessories are needed	System short-circuit capacity, selective coordination, and intelligent requirements

Why choose us?

We are a source factory located in China, capable of providing a full range of products from miniature circuit breakers, molded case circuit breakers to universal circuit breakers. Our value lies in:

Professional selection support: According to your needs, our engineer team will recommend the suitable circuit breaker model for you.

Fast response and delivery: We have stable cooperation with various international logistics providers and can quickly deliver products to your hands.

We’re here to be your go-to partner for electrical protection, giving your electrical systems a solid and safe foundation with our reliable products.

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Small Circuit Breaker 4P

The Small Circuit Breaker 4P is a miniature 4-pole circuit breaker, specifically designed for three-phase four-wire (380V/220V) branch circuits. It adopts a standard modular structure, which can synchronously cut off the three-phase and neutral lines, providing overload and short-circuit protection. The product is easy to install and suitable for small commercial, workshop power boxes and residential scenarios, etc. It can achieve complete isolation of three-phase systems and basic protection of circuits with an economical choice.Small Circuit Breaker 4P: Economical three-phase four-wire miniature circuit breaker In scenarios such as small commercial premises, workshop power cabinets or three-phase residential incoming lines, branch circuits require reliable, economical and space-saving protection solutions. The Small Circuit Breaker 4P is precisely the product designed for this purpose. It adopts a modular structure, which can synchronously control and protect three-phase lines and neutral lines, provide overload and short-circuit protection, and ensure operational safety with complete electrical isolation. It is a fundamental electrical component for building a safe three-phase power distribution system.

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Molded case leakage circuit breaker 125A 4P

The Molded case leakage circuit breaker 125A 4P is a core device specifically designed to provide ground fault protection for three-phase four-wire systems. It integrates the high breaking capacity of a plastic-enclosed circuit breaker with sensitive leakage protection functionality. It can reliably break overload and short-circuit currents at a 125A current rating and simultaneously detect and cut off leakage faults that may cause electric shock or electrical fires. Its four-pole synchronous breaking design ensures complete isolation of the three phases and neutral line, making it suitable for main or branch circuits in industrial workshops, commercial buildings, and new energy charging stations where strict safety protection requirements are in place.

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Electronic Intelligent Circuit Breaker 250A 3P

The Electronic Intelligent Circuit Breaker 250A 3P is a medium-sized three-phase protection device with an electronic trip unit. It can provide reliable overload and short-circuit protection for the circuit, support parameter setting, and can be optionally equipped with a communication module for condition monitoring. This product is applicable to the three-phase main circuits of industrial power distribution, commercial facilities and new energy systems.

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Electronic Intelligent Circuit Breaker 125A 3P

The Electronic Intelligent Circuit Breaker 125A 3P is a high-performance molded case circuit breaker that integrates precise protection, status monitoring and remote control. It adopts an advanced electronic trip unit, which can precisely set and protect current and time parameters. It also has an internal communication module that can upload operation data in real time and receive remote instructions, meeting the core requirements of intelligent power distribution networks for data transparency, control automation and efficient operation and maintenance.What are the differences between electronic intelligent circuit breakers and ordinary circuit breakers? The Electronic Intelligent Circuit Breaker 125A 3P can not only reliably break in case of overload or short circuit, but also issue circuit fault warnings through its built-in high-precision sensors and electronic tripping unit.

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Universal Circuit Breaker Drawer Type 2000A 3P

The Universal Circuit Breaker Drawer Type 2000A 3P is a high-performance protection unit electrical device designed for the main distribution circuits of industrial and large-scale infrastructure. Its advantages lie in the adoption of an advanced drawer-type structure, which not only provides powerful breaking and protection functions but also enables easy and quick replacement and daily maintenance. The product is equipped with built-in safety features such as indication and interlocking. It is suitable for critical applications such as data centers, large factories, and power systems where continuous power supply and convenient operation and maintenance are highly demanded. It is an ideal choice for ensuring the reliable operation and efficient maintenance of core power systems.

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1250A 3P MCCB with Electric Operator

The difference of the 1250A 3P MCCB with Electric Operator product from other molded case circuit breakers lies in the built-in electric operation cabinet. This product not only offers circuit overload and short-circuit protection, but also provides electronic control opening and closing as well as automatic reclosing. It is the primary choice for main incoming line or key feeder protection in modern intelligent power distribution systems, data centers, large industrial plants and new energy power generation systems.

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Molded Case Circuit Breaker 125A 1P

The molded case circuit breaker 125A 1P is a high-breaking capacity circuit breaker designed to protect single-phase high-current circuits. The product's exterior adopts a sturdy plastic shell structure, which can precisely break overload and short-circuit currents of 125A and below, effectively protecting the safety of circuits and equipment. The product is easy to install and suitable for single-phase main circuit or three-phase branch protection in industrial equipment, new energy systems and building power distribution. It is especially suitable for harsh electrical environments that require high reliability and strong breaking capacity.

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Small leakage circuit breaker 63A 1P+N

The Small leakage circuit breaker 63A 1P+N is a core protection switch used in single-phase high-current circuits. It integrates functions such as overload, short circuit and leakage protection within a single pole width, and can simultaneously cut off the phase line and the neutral line in case of a fault to ensure complete isolation. The product structure conforms to standardized dimensions, which can save space in the distribution box. It is especially suitable for the main switch at the entrance of residences and shops or the dedicated line protection of high-power single-phase equipment (such as electric heating units). This product provides a cost-effective safety solution.

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