The 3P 630A thermal magnetic molded case circuit breaker is engineered to deliver uncompromising safety and operational stability for complex low-voltage power distribution systems. Utilizing a highly reliable thermal-magnetic trip unit, this device provides precise, adjustable protection against overloads and short circuits. By actively monitoring current fluctuations, it ensures that your electrical infrastructure remains secure even under the most demanding load conditions. The internal mechanism is designed to react instantly to electrical faults, isolating circuits effectively to prevent equipment damage and maintain continuous facility operation. Furthermore, the integration of advanced arc-extinguishing technology within the breaker ensures rapid fault clearance, minimizing thermal stress on the surrounding electrical components and extending the overall lifespan of the distribution network.
Beyond its core protection capabilities, this 800V to 1140V MCCB is developed with a strong focus on ergonomic design and installation efficiency. The optimized front panel layout and intuitive operating handle significantly reduce the time and labor costs associated with wiring and assembly for panel builders. The streamlined terminal configuration allows for secure and rapid connections, ensuring that integration into industrial control cabinets is both straightforward and highly efficient. This thoughtful engineering approach translates directly into accelerated project timelines and reduced overhead for assembly facilities, making it an ideal choice for large-scale electrical upgrades.
SRM3-630HU
Rated current In(A):500A 630A
Rated working voltage:800 1000/1140 1500
Poles:3
Breaking capacity:50 40 10
Rated insulation voltage Ui:1600V
Rated impulse withstand voltage Uimp:12KV
Wiring mode:
Mechanical life(Total times):5000
Electrical life(Total times):1000 700 500
Quality certificate:CCC CB CE TUV Certificate
SRM3(DC)-(HU) series AC/DC molded case circuit breaker meet the following standards.
IEC 60947-1 GB/T 14048.1 General Provisions
IEC 60947-2 GB/T 14048.2 circuit breaker
Strict adherence to these international standards ensures that the 3P 630A thermal magnetic MCCB delivers exceptional reliability across diverse industrial applications. Designed specifically for integration into industrial control cabinets and low-voltage distribution networks, this circuit breaker offers an outstanding return on investment by minimizing electrical faults and enhancing overall system longevity. The dependable construction guarantees that the unit performs consistently under heavy electrical loads, providing facility managers with peace of mind and predictable operational expenses.
In addition to technical excellence, this product is manufactured with a strong commitment to environmental compliance and sustainable development. Throughout its lifecycle, strict carbon footprint management protocols are implemented to minimize environmental impact. The construction utilizes a high proportion of recyclable materials, and the unit is delivered in eco-friendly packaging. These sustainable practices directly support procurement teams and organizations in achieving their Environmental, Social, and Governance (ESG) carbon reduction targets without compromising on electrical safety or performance.
Various characteristics and accessories of the circuit breaker shall be fixed by the manufacturer and shall not be adjusted in the use. Under the compliance with custody and use conditions, from the date of 24 months from the manufacturer delivery and in the situation of the circuit breaker intact seals, if the product is damaged or not used normally due to manufacturing quality problems, the manufacturer shall be responsible for the replacement and repair without charge.
To further safeguard your electrical infrastructure, our comprehensive lifecycle service extends beyond the standard warranty period. We provide a complete after-sales support system designed to maximize equipment uptime and mitigate the risks associated with unexpected power interruptions. This includes a readily available inventory of essential spare parts, ensuring that any required replacements can be dispatched and installed with minimal delay. Our dedicated technical support team is always prepared to assist with troubleshooting, maintenance inquiries, and operational guidance.
For facilities requiring enhanced security, extended warranty service plans are available to provide continuous protection for your investment. Regular maintenance routines, combined with our responsive repair support, ensure that the molded case circuit breaker continues to operate at peak efficiency throughout its intended lifespan. By prioritizing long-term reliability and offering structured maintenance solutions, we help facility operators maintain a safe, continuous power supply while significantly reducing the likelihood of costly operational downtime.
1. The altitude is not higher than 2,000m
2. It is resistant to damp air(three-proof type)
3. It is resistant to the influence of salt fog and oil fog(three-proof type)
4. It is resistant to the influence of mold (three-proof type)
5. In a medium without explosion risk, and the medium is not enough to corrode the metal and destroy the insulation of the gas and conductive dust.
Note:the three-prevention products should be specially customized, please indicate TH.
Industrial environments often present severe challenges to electrical components, which is why this molded case circuit breaker is engineered for exceptional resilience. The specialized three-proof customization provides critical protection against moisture, salt spray, and fungal growth, making it highly suitable for coastal facilities, chemical processing plants, and other highly corrosive environments. Even when deployed at elevations up to 2000 meters, the device maintains superior dielectric strength and stable conductive performance, preventing arc flash incidents and insulation degradation.
This robust environmental adaptability ensures that the circuit breaker remains fully operational in conditions where standard electrical components might fail. The sealed construction and treated internal components repel conductive dust and resist the corrosive effects of airborne industrial byproducts. By specifying the customized TH version, facility engineers can confidently deploy this protective device in the most demanding atmospheric conditions, ensuring that critical power distribution networks remain safe, compliant, and uninterrupted regardless of external environmental stressors.