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ABB S403M Miniature Circuit Breaker, 4-Pole, 20A, Type D, 12V ac AC, 400 V dc DC, 10 kA Breaking Capacity
Engineered for industrial use, the ABB S403M Miniature Circuit Breaker, 4-Pole, 20A, Type D, 12V ac AC, 400 V dc DC, 10 kA Breaking Capacity delivers consistent and dependable operation suited to control systems, electrical protection, and automation applications.

ABB S403M Miniature Circuit Breaker, 4-Pole, 20A, Type D, 12V ac AC, 400 V dc DC, 10 kA Breaking Capacity
Engineered for industrial use, the ABB S403M Miniature Circuit Breaker, 4-Pole, 20A, Type D, 12V ac AC, 400 V dc DC, 10 kA Breaking Capacity delivers consistent and dependable operation suited to control systems, electrical protection, and automation applications.

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Product Description
The ABB S403M Miniature Circuit Breaker, 4-Pole, 20A, Type D, 12V ac AC, 400 V dc DC, 10 kA Breaking Capacity is a high-performance industrial component engineered to deliver dependable operation across demanding environments.
The product incorporates durable materials and precision components that contribute to a long operational service life. Its design ensures straightforward installation and integration into existing systems, reducing commissioning time and labor costs. Compliance with recognized international standards ensures compatibility with global industrial infrastructure and regulatory requirements.
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.
The product conforms to applicable IEC and international standards governing industrial electrical components. Its electrical and mechanical ratings ensure compatibility with the voltage levels, current capacities, and environmental conditions typical of industrial installations. The design supports both panel-mount and field installation configurations, providing flexibility for various project requirements.
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.
Sourced and supplied by Z&F Corporation, this product is backed by expert technical support and a commitment to industrial quality standards. It represents a proven specification for industrial applications where reliability, safety, and performance consistency are required. For more information about this product, technical specifications, or to request a quotation, contact Z&F Corporation's industrial procurement and supply team.
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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