Three phase circuit breaker

The correct choice is based on three key factors: the system’s rated current (for example 63A or 160A), the number of poles (3P), and the breaking capacity during a fault (Breaking Capacity) measured in kA (kilampere capacity). In our selection, you’ll find MCCB models with different ratings such as 63A, 250A, 400A, and 630A, with breaking capacities up to 50kA. Choose based on the current and fault severity your system may face, and make sure the frame matches and that you have a properly installed 3P breaker to ensure reliable protection for your electrical circuits.

Breaking capacity reflects how well the breaker can safely interrupt a high fault current without failing. This protects wires and equipment from damage caused by excessive current. In the available range, you can find breakers with breaking capacities such as 25kA, 35kA, and 50kA. Choosing a higher breaking capacity makes the system safer during major fault conditions—especially in industrial facilities or homes with heavy loads. Think about the closest possible fault level you may encounter, then choose starting from there to ensure effective, compatible protection for a three-phase system.

A home user may need an MCCB with lower ratings like 63A or 100A to protect wiring installed in residential spaces. Small facilities or workshops will benefit from models rated 125A–160A with breaking capacities of 35kA, while larger applications may require 250A to 630A with breaking capacities up to 50kA for high-level protection. Choose according to your actual use, wire size, and system load to ensure reliable protection for equipment and safe electrical distribution.

Installation and wiring should always be carried out by a qualified electrician to ensure safety and optimal performance. All MCCB parts in our list typically come with plastic packaging and include a one-year warranty from the seller. Check the DIN Rail mounting type, the breaker dimensions, and the type of 3-pole load before installation. Following the manufacturer’s instructions and technical documentation ensures system readiness, stable performance long-term, and reduces the risk of electrical faults.

You’ll find a wide range of three-pole MCCB breakers with current ratings from 16A to 630A, along with different breaking capacities up to 50kA. Options include models from trusted brands that suit the needs of homes, offices, and small projects. The key differences are the frame, size, and load-handling capability—allowing you to select the most suitable breaker for your electrical distribution plan. Base your choice on expected current, wire size, and the protection system required for effective, stable protection.

The main difference is that MCCB handles higher currents and larger breaking capacities than MCB. It’s designed for three-pole distributions or systems with heavier loads. MCB is more suitable for home or office use with lighter loads, as it supports shorter interruption times and provides quick short-circuit protection. When choosing, review the maximum expected current in your system, the mounting type, and the protection type required to ensure safe, reliable operation for your electrical plan.