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ABB S400M S403M Miniature Circuit Breaker, 4-Pole, 50A, Type C, 440V ac AC, 12 V dc DC, 15 kA Breaking Capacity
Purpose-built for industrial applications, the ABB S400M S403M Miniature Circuit Breaker, 4-Pole, 50A, Type C, 440V ac AC, 12 V dc DC, 15 kA Breaking Capacity is a reliable component suitable for installation in control panels, switchgear, and industrial automation systems.

ABB S400M S403M Miniature Circuit Breaker, 4-Pole, 50A, Type C, 440V ac AC, 12 V dc DC, 15 kA Breaking Capacity
Purpose-built for industrial applications, the ABB S400M S403M Miniature Circuit Breaker, 4-Pole, 50A, Type C, 440V ac AC, 12 V dc DC, 15 kA Breaking Capacity is a reliable component suitable for installation in control panels, switchgear, and industrial automation systems.

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Product Description
Engineered for durability and performance, the ABB S400M S403M Miniature Circuit Breaker, 4-Pole, 50A, Type C, 440V ac AC, 12 V dc DC, 15 kA Breaking Capacity is a trusted industrial component suited for a wide range of operational environments.
This product features rugged construction designed to withstand the mechanical stresses and environmental challenges typical of industrial installations. Its compact design allows for efficient space utilization in control panels, distribution boards, and automation enclosures. The unit provides reliable protection and operational control under continuous-duty conditions, reducing maintenance requirements and unplanned downtime.
The product is widely used in industrial process control applications, including manufacturing automation, power generation, and heavy industry. It supports reliable operation in oil and gas facilities, refineries, chemical processing plants, and utility infrastructure. Its suitability across multiple industry verticals makes it a versatile choice for procurement teams responsible for multi-site industrial operations.
Manufactured to international quality standards, the product undergoes rigorous testing to verify performance under rated conditions. Its rated electrical characteristics ensure compatibility with standard industrial supply voltages and control circuit configurations. The physical design accommodates standard mounting arrangements, simplifying integration into existing infrastructure.
The ability to source a reliable, standards-compliant component through a reputable distributor contributes directly to project quality and schedule certainty. For engineering contractors and EPC firms, consistent component specifications reduce procurement risk and support repeatable system performance across multiple project sites. The product's design also simplifies spare parts inventory management, as its standardized specifications allow for straightforward substitution and compatibility verification. These practical considerations make it a preferred specification for industrial projects where component reliability directly impacts operational outcomes.
For procurement teams, facilities engineers, and project developers working in demanding industrial sectors, this product represents a dependable, well-specified component choice. Its combination of proven performance, build quality, and standards compliance makes it suitable for critical applications where reliability is paramount. Z&F Corporation supplies this product as part of its comprehensive range of industrial electrical and automation solutions, ensuring availability and expert technical support for clients across multiple sectors.
Frequently Asked Questions
The trip curve — how many times the rated current has to flow before it trips instantly. Type B trips at 3–5×, Type C at 5–10×, and Type D at 10–20×, so the right choice depends on the inrush current of what's connected.
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