In electrical control systems, contactors are essential components used to control the on-off of circuits and electrical equipment. However, not all contactors are the same—Modular Contactor and normal (traditional) contactors differ significantly in design, performance, and application scenarios. Understanding these differences is crucial for selecting the right device for specific electrical projects. Zhejiang C&J Electrical co., ltd. (referred to as C&J Electrical) specializes in high-quality electrical control devices, and its BMC7 series Modular Contactor stands out with compact design, wide adaptability, and reliable performance, becoming the preferred choice for residential and light commercial electrical control systems.
Key Differences Between Modular Contactor and Normal Contactor
The main differences are size, installation method, and application. Modular contactors are compact, DIN rail-mounted devices designed for residential and light commercial use, while traditional contactors are larger, more robust units built for heavy industrial applications. Beyond these core differences, the two types of contactors also vary in load capacity, structural design, and integration capability, which determine their respective scope of application.
Traditional contactors are designed for high-load, harsh industrial environments, with large volumes, strong structural robustness, and high rated current (often exceeding 100A), suitable for controlling large motors, industrial pumps, and heavy-duty electrical equipment. In contrast, Modular Contactor adopts a miniaturized, modular design, which is small in size, light in weight, and suitable for DIN rail installation. It has moderate load capacity and is mainly used for light-load control scenarios such as residential and commercial buildings.
Core Overview of Modular Contactor
Modular Contactor is a miniaturized, standardized electrical control device designed based on the modular concept. It is an important part of the DIN rail electrical product series, featuring compact structure, easy installation, and strong integration. Unlike traditional contactors that focus on heavy-load control, modular contactors are mainly used to control low-inductance loads and small motor loads, providing stable on-off control and protection for circuits.
Compliant with international standards, Modular Contactor is designed for convenience and practicality. Its modular structure allows it to be easily integrated with other DIN rail devices (such as circuit breakers, RCDs) in distribution panels, reducing installation space and improving the tidiness and maintainability of electrical systems. C&J Electrical’s BMC7 series Modular Contactor is an AC/DC universal type product, which further expands its application scope and meets the diverse needs of different scenarios.
Core Functions of Modular Contactor
C&J Electrical’s BMC7 series Modular Contactor integrates multiple core functions, providing stable and reliable control for light-load electrical systems. Its main functions include:
- Circuit on-off control: Precisely controls the on-off of low-inductance loads (such as lighting, heating, ventilation equipment) and small motor loads (such as household pumps, small fans), ensuring stable operation of equipment.
- AC/DC universal control: Supports both AC and DC control, adapting to different power supply environments and expanding the scope of application.
- High endurance performance: Excellent mechanical and electrical endurance, capable of withstanding long-term frequent switching operations, ensuring long service life.
- Safety protection: Complies with SELV (Safety Extra Low Voltage) requirements, with high insulation performance and impulse withstand voltage, effectively preventing electrical hazards such as leakage and short circuit.
- Easy integration: DIN rail-mounted design, compatible with other modular electrical devices, facilitating the assembly and maintenance of distribution panels.
- Harsh environment adaptation: Wide operating and storage temperature ranges, strong resistance to humidity and extreme temperatures, suitable for various complex indoor environments.
Application Scenarios of Modular Contactor
With the advantages of compact size, easy installation, and wide adaptability, Modular Contactor is mainly used in residential, light commercial, and small industrial scenarios that require light-load control. The main application fields are as follows:
- Residential buildings: Used in household distribution boxes to control lighting systems, air conditioners, water heaters, ventilation fans, and small household pumps, providing convenient and stable circuit control.
- Light commercial buildings: Shopping malls, office buildings, hotels, and convenience stores, controlling lighting, central air conditioning terminals, exhaust fans, and small commercial equipment (such as vending machines), improving energy efficiency and management convenience.
- Small industrial workshops: Controlling small motors, ventilation equipment, and heating devices in small workshops, adapting to the limited installation space of small-scale production lines.
- Public facilities: Corridors, stairwells, and public toilets in schools, hospitals, and communities, controlling public lighting and ventilation systems, realizing energy-saving and intelligent control.
- Intelligent buildings: Integrated into intelligent control systems, matching with sensors and controllers to realize automatic control of lighting, ventilation, and air conditioning, improving the intelligence level of buildings.
- Household electrical equipment: Used as a control component in household appliances, controlling the on-off of internal circuits of small motors and electrical loads, ensuring the safe and stable operation of appliances.
C&J Electrical’s BMC7 Series Modular Contactor: Core Advantages & Specifications
C&J Electrical’s BMC7 series Modular Contactor is an AC/DC universal type high-performance product, designed in accordance with international standards, integrating compactness, reliability, and versatility. It is suitable for various light-load control scenarios and provides reliable support for residential and light commercial electrical systems. Its core advantages, product overview, and technical parameters are as follows:
Product Overview & Core Advantages
- Wide application scope: Suitable for AC 50Hz/60Hz circuits, rated working voltage up to 400V, rated current up to 63A, controlling low-inductance loads of household appliances and small motor loads (with corresponding power reduction).
- International standard compliance: Designed according to IEC/EN61095, IEC60947-4-1 standards, mainly used in buildings for switching and controlling lighting, heating, ventilation, and pumps.
- Easy integration: As part of the complete DIN rail product range, it can be easily integrated into dedicated distribution panels, reducing installation space and improving system tidiness.
- AC/DC universal: Supports both AC and DC control, adapting to different power supply environments and meeting diverse application needs.
- High safety performance: Complies with SELV requirements, with high insulation voltage and impulse withstand voltage; protection grade up to IP40 (in modular enclosure), effectively preventing electrical hazards.
- Durable and reliable: Excellent mechanical endurance (1,000,000 cycles) and electrical endurance (100,000 cycles), capable of withstanding frequent switching operations, long service life.
- Customizable services: Supports OEM brand customization, multiple specifications available, wide application scenarios, and high safety performance, meeting personalized customer needs.
Main Technical Parameters
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Parameter
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Details
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|---|---|
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Voltage Rating (Ue)
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250VAC/400VAC
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Frequency
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50/60Hz
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Mechanical Endurance (O-C)
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1,000,000 cycles
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Electrical Endurance
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100,000 cycles
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Maximum Daily Switching Operations
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100
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Insulation Voltage (Ui)
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500V AC
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Pollution Degree
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2
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Rated Impulse Withstand Voltage (Uimp)
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2.5kV (4kV for 12/24/48VAC versions)
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Protection Degree (IEC 60529)
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IP20 (Device only) / IP40 (Device in modular enclosure)
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Operating Temperature
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-5℃~+60℃
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Storage Temperature
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-40℃~+70℃
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Tropicalization (IEC 60068.1)
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Treatment 2 (relative humidity 95% at 55℃)
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Safety Compliance
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ELSV compliance for 12/24/48VAC versions; Conforms to SELV requirements
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Why Choose C&J Electrical’s BMC7 Series Modular Contactor?
In the field of Modular Contactor, the BMC7 series product from C&J Electrical has obvious competitive advantages, becoming the preferred choice for customers pursuing compactness, reliability, and versatility:
- Versatile and adaptable: AC/DC universal control, wide voltage and current range, suitable for various light-load control scenarios, meeting diverse application needs.
- International standard quality: Complies with IEC/EN61095, IEC60947-4-1 standards, strict quality control, stable and reliable performance, safe to use.
- Easy to install and integrate: DIN rail-mounted design, compact size, easy integration with other modular devices, reducing installation and maintenance costs.
- Durable and long-lasting: Excellent mechanical and electrical endurance, strong resistance to harsh environments, long service life, reducing replacement costs.
- High safety performance: SELV compliance, high insulation and impulse withstand voltage, multiple protection levels, effectively avoiding electrical hazards.
- Flexible customization: Supports OEM brand customization, multiple specifications available, adapting to the personalized needs of different customers and markets.
- Professional support: C&J Electrical has a professional technical team that can provide customers with tailored Modular Contactor solutions and comprehensive after-sales services, solving customers’ worries.
Get in Touch
If you have any questions about the BMC7 series Modular Contactor, such as product specifications, technical details, customization needs, or bulk orders, please feel free to contact C&J Electrical. Our professional team will provide you with high-quality electrical control solutions and reliable services to ensure the safe and stable operation of your electrical system.
Post time: Feb-02-2026