Description
The S203-C63 miniature circuit breaker from ABB’s System pro M compact S200 series offers robust and dependable three-phase circuit protection. With its dual tripping mechanisms—a delayed thermal trip for overload protection and an electromechanical trip for short-circuit faults—it ensures fast and reliable fault interruption. Featuring a Type C tripping curve, this MCB is ideal for applications with moderate inrush currents such as HVAC, lighting, or motor systems. The 3-pole modular configuration provides complete phase isolation and fits easily onto standard DIN rails. Optional bottom-fitting auxiliary contacts help save up to 50% space, making it a versatile solution for modern electrical systems. For fully integrated setups, it can be combined with our industrial panel fabrication solutions.
Key Specifications – Miniature Circuit Breaker S203-C63
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Model: S203-C63 
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Rated Current: 63 A 
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Tripping Characteristic: Type C 
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Rated Voltage: 230/400 V AC 
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Breaking Capacity: 6 kA 
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Poles: 3P (Three-Pole) 
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Tripping Mechanisms: - 
Thermal: Overload protection 
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Electromechanical: Short-circuit protection 
 
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Standards Compliance: IEC/EN 60898-1, IEC/EN 60947-2, UL1077 
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Mounting: DIN-rail modular system 
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Configurations: 1P, 1P+N, 2P, 3P, 3P+N, 4P 
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Operating Temperature: -25°C to +55°C 
Highlights
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Dual tripping mechanism ensures precise fault protection 
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Type C curve suitable for circuits with moderate inrush currents 
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Compact 3-pole design provides complete phase isolation 
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Modular, current-limiting design optimizes panel space 
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Compatible with auxiliary and signaling contact modules 
Typical Uses
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Industrial and commercial distribution panels 
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HVAC, lighting, and small machinery protection 
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Automation and control systems 
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Sub-distribution and heavy-load circuits 
Installation & Support
The S203-C63 is designed for quick and easy DIN-rail installation.
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Supports auxiliary and signaling accessories 
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Delivered with complete wiring and installation documentation 
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Backed by ABB’s technical service and global support network 
 
					 
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