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Tertiary circuit breakers from 6 kA
Tertiary circuit breakers, also known as miniature circuit breakers (MCBs) or final distribution circuit breakers, are designed for overcurrent and short-circuit protection in low-voltage electrical installations. These devices typically feature a rated short-circuit breaking capacity of 6 kA according to IEC 60898-1 standards, with rated curren...
Tertiary circuit breakers, also known as miniature circuit breakers (MCBs) or final distribution circuit breakers, are designed for overcurrent and short-circuit protection in low-voltage electrical installations. These devices typically feature a rated short-circuit breaking capacity of 6 kA according to IEC 60898-1 standards, with rated currents ranging from 0.5 A to 63 A. They are available in single-pole (1P), double-pole (2P), triple-pole (3P), and four-pole (4P) configurations, with voltage ratings up to 400 V AC. The trip curves (B, C, D) define their instantaneous tripping characteristics, making them suitable for different load types such as resistive, inductive, or motor loads. These circuit breakers are modular devices with a width of 17.5 mm per pole, designed for DIN rail mounting in distribution boards. They incorporate thermal-magnetic trip mechanisms for reliable protection against overloads and short circuits.
Tertiary circuit breakers are primarily installed in final distribution boards, consumer units, and sub-distribution panels in residential, commercial, and light industrial buildings. They protect lighting circuits, socket outlets, HVAC systems, and small motor loads. In industrial settings, they are used in control panels and automation cabinets for protecting auxiliary circuits, control transformers, and PLC power supplies. Their compact design allows for high-density installation in limited spaces, making them ideal for modular electrical systems.
Key subcategories include single-pole MCBs (e.g., code S05-1P-6kA), double-pole MCBs (S05-2P-6kA), triple-pole MCBs (S05-3P-6kA), and four-pole MCBs (S05-4P-6kA). The article code typically follows the pattern: S05-[number of poles]-6kA-[rated current], where rated current values range from 0.5 A to 63 A. Common rated currents include 6 A, 10 A, 16 A, 20 A, 25 A, 32 A, and 40 A. These circuit breakers are available with different trip curves: B-curve for resistive loads, C-curve for general loads, and D-curve for motor and transformer loads.
Our platform offers real-time pricing and express worldwide shipping for all tertiary circuit breaker models. Each product includes detailed technical documentation with breaking capacity curves, I²t characteristics, and dimensional drawings. Our team of specialized electrical engineers provides personalized technical support for selecting the appropriate trip curve and rated current based on your specific load requirements and installation conditions. We ensure fast delivery to any global destination, minimizing downtime in your projects.
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