Wholesale MCCB Company Manufacturers & Factory

High-Voltage Molded Case Circuit Breakers & Custom OEM/ODM Electrical Power Distribution Solutions

Leading the Future of Power Distribution: Acereare Electric

Founded in 2015, Acereare Electric is a powerhouse in Low Voltage distribution engineering, comprising two wholly-owned manufacturing subsidiaries: RuiRui Electric and KeRui Electric.

We are a professional original manufacturer integrating R&D, production, and sales. We specialize in Molded Case Circuit Breakers (MCCB), Air Circuit Breakers (ACB), and structural copper components. Inheriting over 20 years of craftsmanship from two generations of engineering leaders, our factory group stands as a Top-tier well-known ODM manufacturer in China, delivering solid technical expertise, product reliability, and high-performance operations.

Acereare Electric Factory Manufacturing Facility
50+
R&D Engineers
400+
Skilled Factory Personnel
250M
Annual Sales (RMB)
20+
Years of Craftsmanship

Global Procurement Dynamics & Molded Case Circuit Breaker Sourcing

In modern industrial facilities, switchgear manufacturers, and global infrastructure projects, procuring reliable low-voltage components is critical to grid reliability. Sourcing Molded Case Circuit Breakers (MCCB) requires a balance of high performance, environmental compliance, and cost-efficiency. Global commercial and industrial buyers focus on selecting components with specific electrical profiles, long electrical lifespans, and certificates that streamline global exports.

Electrical Parameter Selection Metrics

High-voltage solar PV systems, critical data centers, and heavy-duty manufacturing centers operate under demanding power requirements. To ensure system coordination, engineers must evaluate three primary parameters:

  • Rated Ultimate Short-Circuit Breaking Capacity (Icu): The maximum fault current the circuit breaker can safely clear without permanent damage to the contacts.
  • Rated Service Short-Circuit Breaking Capacity (Ics): The level of fault current the breaker can interrupt and continue operating under normal loads. Top-tier manufacturers design MCCBs where Ics = 100% Icu, ensuring maximum reliability after clear-out.
  • Rated Impulse Withstand Voltage (Uimp): The impulse voltage peak the breaker can withstand without insulation failure. Our systems support up to 8kV/12kV ratings to protect against transient lightning and switching surges.
Parameter ARM1 Series (Standard) ARXM3 Series (Performance) ARM5HU Series (High Voltage PV)
Rated Voltage (Ue) AC 400V/690V AC 400V/690V AC 800V/1000V/1140V
Rated Current (In) 16A - 1250A 63A - 125A 100A - 630A
Breaking Capacity (Icu) 35kA - 85kA 50kA - 100kA 35kA - 50kA (at high Ue)
Trip Unit Type Thermal-Magnetic Thermal-Magnetic / Electronic Specialized PV Magnetic

Macro-Industry Sourcing Challenges

Global supply networks face several challenges, including copper commodity price volatility, compliance with international standards (such as IEC/EN 60947-2), and shipping logistics. Industrial buyers need partners who can stabilize prices and offer flexible OEM/ODM contract terms. Working with direct manufacturers like Acereare Electric simplifies procurement, ensuring fast engineering response, customizable packaging, and international compliance certification.

Core Competencies

Over two decades of experience in components stamping, mold design, and assembly gives us a vertical advantage. We control raw materials to guarantee competitive pricing.

R&D Capabilities

We launch over 50 R&D projects each year, optimizing arc quenching, bimetallic thermal responsiveness, and smart electronic trip technology.

Why Choose Acereare Electric?

We deliver reliable quality and high performance through complete in-house manufacturing, R&D, and quality inspection.

01. Manufacturing Ability

One-Stop Service utilizing six core processing technologies, high-precision automated assembly lines, and over 10 active production lines.

02. Research & Design

Over 50 R&D engineers with 5+ years of experience. We provide 3D CAD modeling, component structural simulations, and custom performance design.

03. Supply & Delivery

Operating two manufacturing facilities to scale up component stamping and final assemblies. Supported by ERP and U8 logistics management.

04. Quality Assurance

Rigorous in-house laboratory testing with over 150 instruments. Backed by 20+ QC inspectors using PLM, MES, and BI tracking software.

Macro Industry & Application Solutions

Acereare Electric designs custom circuit breakers for specialized industrial environments, from high altitude to smart grids.

01 Low Temperature Environment Circuit Breaker

Low Temperature Protection

We use low-temperature resistant bimetals and specialized mechanical lubrication. Tested and verified for reliable operation at temperatures down to -40℃.

02 Salt Spray Corrosion Proof Circuit Breaker

Marine & Salt Spray Resistance

Specifically designed for docks and offshore installations. Complete units undergo a 72-hour salt spray test, and key components undergo a 48-hour test, protecting contacts against humid, salty maritime environments.

03 High Altitude Derating Application

High Altitude Application

For installations above 2000m. We adjust voltage and current ratings based on a high-altitude derating table to compensate for thinner air and reduced thermal dissipation.

04 Residential and Commercial Buildings MCCB

Residential & Buildings

Protects household appliances and HVAC systems against short-circuits and overloads. Highly compact designs simplify installation in standard distribution boards.

05 High Temperature Industrial Circuit Breaker

High Temperature Resilience

Constructed with high-temp heat-resistant housings and thermally insulated internal barriers. Tested to operate stably in constant-temperature test environments up to 55℃.

06 Intelligent Measurement Edge Computing Breaker

Intelligent Measurement & IoT

Supports edge computing, real-time power metering, and remote RS485/Modbus communication. Enables smart grid integration, remote control, and predictive maintenance diagnostics.

Technical Analysis: ARW1 Intelligent Air Circuit Breakers (ACB)

For primary power distribution boards and high-capacity switchgear panels, the ARW1 Series Intelligent Air Circuit Breaker is designed to protect low-voltage distribution systems. Operating at 50Hz, with rated voltages up to 690V and currents from 400A to 6300A, the ARW1 ACB provides reliable protection and high short-circuit withstand capabilities (Icw).

Selective Coordination and Microprocessor Trip Units

The ARW1 ACB features electronic trip units that allow precise protection settings, supporting selective coordination between upstream breakers and downstream MCCBs. This prevents cascading trips, isolating faults to the affected sub-circuit and keeping the rest of the facility powered.

Its open communication interface supports Modbus-RTU, Profibus, and DeviceNet protocols, enabling four key functions for automation and control centers:

  • Telemetry (Remote Sensing): Real-time tracking of current, voltage, active power, and frequency.
  • Tele-adjustment (Remote Parameter Setting): Adjust trip curves, delay times, and protection thresholds remotely.
  • Tele-control (Remote Switching): Remotely open or close the air circuit breaker via motor operators.
  • Tele-signaling (Remote Status Indication): Real-time status reporting on contact position, trip alarms, and fault types.

Contact Erosion and Arc Quenching Technology

Interrupting high currents produces intense electrical arcs that can wear down contacts. Our ARW1 and ARM5 series feature arc-chutes designed to split and cool arcs. Standard copper contact carriers are faced with silver alloy inserts, providing high electrical conductivity and resistance to contact welding during fault conditions.

Technical Specifications

Standard Compliance: IEC/EN 60947-2, GB/T 14048.2

Poles: 3 Poles / 4 Poles

Drawout/Fixed Type: Available in drawer type (with slide-out base) or space-saving fixed type configurations.

Operating Life: 20,000 mechanical operations and 5,000 electrical operations at rated load.

International Compliance & Quality Certificates

Acereare Electric products are rigorously tested to meet global electrical safety, quality, and environmental regulations.

Electrical Safety Certificate 1
Electrical Safety Certificate 2
Electrical Safety Certificate 3
Electrical Safety Certificate 4
Electrical Safety Certificate 5
Electrical Safety Certificate 6
Electrical Safety Certificate 7
Electrical Safety Certificate 8
Electrical Safety Certificate 9
Electrical Safety Certificate 10

Our One-Stop Sourcing Workflow

We provide a streamlined supply chain from design to delivery, keeping you informed at every production stage.

1

Customer Consultation

Review engineering and voltage specifications to select the right components.

2

Technical Support

R&D engineers design and customize electrical drawings.

3

Plan Signing

Approve production drawings, finalize contract details, and secure production schedules.

4

Production & QC

In-house parts manufacturing and final assembly, backed by strict inspection and lab testing.

5

Delivery

Manage export customs documentation and arrange sea or air shipment.

Custom OEM & ODM Services

We leverage our components factories and automated assembly lines to provide flexible manufacturing services for global brands.

Brand Service

Build and scale your brand recognition with customized brand and marking services.

  • Custom laser logo etching on circuit breaker enclosures.
  • High-grade raw materials ensure reliable long-term operations.
  • Quick turnaround for custom prototypes and evaluation samples.
  • Proprietary structural enclosure designs to differentiate your brand.

OEM Service

Leverage our engineering expertise and manufacturing capacity to build your products.

  • Custom tool development and mold modification services.
  • Custom electronic trip thresholds and timing characteristics.
  • Assistance with local certification testing (CE, CB, CCC, UL).
  • Round-the-clock technical support for international teams.

ODM Service

Launch complete product ranges using our verified, pre-certified circuit breaker designs.

  • Authorized private-label branding and custom design.
  • Custom multi-lingual manuals and color-box packaging.
  • Custom marketing materials and technical datasheets.
  • Low minimum order quantities (MOQ) for starting campaigns.

Frequently Asked Questions & Support

Get answers to common technical, manufacturing, and shipping questions.

What is the difference between MCCB (Molded Case Circuit Breaker) and ACB (Air Circuit Breaker)?
MCCBs are typically used for downstream load protection, with rated currents up to 1600A. They feature a molded plastic housing and use thermal-magnetic or electronic trip units. ACBs are designed as main incoming circuit breakers in low-voltage networks. They handle currents up to 6300A and have high short-circuit withstand capabilities (Icw) to support selective coordination.
How does high altitude affect Molded Case Circuit Breakers?
At altitudes above 2000 meters, thinner air reduces thermal cooling and dielectric insulation. This slows heat dissipation and makes extinguishing electrical arcs more difficult. To compensate, circuit breakers must be derated by reducing their rated operational voltage (Ue) and rated continuous current (In).
What is the distinction between Icu (Ultimate) and Ics (Service) breaking capacities?
Icu is the maximum short-circuit current a breaker can safely interrupt, though it may require inspection or replacement afterward. Ics is the level of fault current the breaker can interrupt and still remain operational. For critical applications, look for breakers where Ics is 100% of Icu.
Do you support specialized high-voltage circuit breakers for solar PV installations?
Yes. Our ARM5HU and specialized PV series are designed for solar applications, supporting DC operating voltages up to 1500VDC and AC voltages up to 1140VAC/800VAC. These units are built to protect central and string inverters, battery energy storage systems (BESS), and solar distribution panels.
How does your factory manage quality control for raw materials?
We manufacture key copper contacts, stamped components, and molded plastic parts in-house. Incoming raw materials are inspected using spectrometers and hardness testers. Production is tracked via ERP, MES, and PLM software to ensure material consistency and batch traceability.