⚡ MCB / MCCB / ACB Selection Calculator

Breaker Rating · Curve · Breaking Capacity

Load Current (A)

Load Type Motor Lighting Heater / Resistive

Phase Type Single Phase Three Phase

Short Circuit Level (kA) (Optional)

Please enter a valid load current.

📐 Formulas & Selection Logic

• Design Current = Load Current × 125%
• Breaker Rating ≥ Design Current
• Breaker Type based on current range
• Tripping Curve based on load nature

🛠 Practical Notes

• Final breaker selection must comply with local electrical codes (IEC / NEC).
• Motor starting current may require higher curve or breaker rating.
• Always verify manufacturer datasheets before installation.

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