Work out the circuit breaker rating and curve type your load needs — enter your load in kW or amps, and we'll estimate the right MCB size and flag which ones we already have in stock.
The "curve" determines how quickly the breaker trips under overload versus short-circuit conditions — matching it to your load type prevents nuisance tripping or under-protection.
Most sensitive curve. Best for resistive loads with low inrush: lighting circuits, socket outlets, heaters, domestic distribution boards.
Order on requestThe general-purpose curve. Handles moderate inrush from small motors, fluorescent/LED banks, and mixed commercial or industrial circuits.
✓ In stock — C10, C16, C25, C32, C63Least sensitive curve. Needed for high inrush loads: large motors, transformers, welding equipment, X-ray and similar heavy machinery.
Order on request