Electrical Tools
Circuit Breaker Sizing Calculator
Calculate the correct circuit breaker size for your electrical load. Supports current or power input, single/three-phase, and adjustable safety factor. Based on IEC/KS standard breaker sizes.
Input
Result
Recommended Breaker
Load Current
Min. Breaker (×)
Utilization
Fill in all fields to calculate.
Standard breaker sizes per IEC/KS. Apply ×1.25 safety factor per KEC.
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