20 amp 3 pole Miniature Circuit Breaker

20 amp 3 pole miniature circuit breaker (MCB) is used to electrical circuits from overloads and short circuits. This C20 mini circuit breaker with C curve trip characteristic allows for the protection of all 3 conductors in a 3 phase system, providing circuit protection.

3 Pole MCB Breaker Information

• Rated Current: 20 amp
• Rated Voltage: 230/400V AC, 50Hz
• Number of poles: 3 pole
• 6 kA rated short-circuit breaking capacity
• Compliant with IEC standard
• C curve trip characteristic
• With overload protection and short circuit protection function

Technical Data

3 Pole MCB Breaker Dimensions (Unit: mm)

Details

Tips: How to choose a miniature circuit breaker for the motor?

When selecting a miniature circuit breaker (MCB) for a motor, consider the following key factors:

• Current Rating: Choose a mini MCB breaker with a current rating that matches the motor's full-load current. It's important to select a micro circuit breaker that can handle the motor's startup current, which can be significantly higher than the running current.
• Motor Type and Inrush Current: Motors, especially induction motors, have a high inrush current during startup. Choose a mini MCB with a C curve (for moderate inrush currents) or D curve (for motors with high inrush currents) to avoid unnecessary tripping during startup.
• Breaking Capacity: Ensure the MCB's short-circuit breaking capacity is sufficient to handle potential fault currents without damage.
• Voltage Rating: Make sure the MCB’s voltage rating matches or exceeds the motor’s operating voltage (typically 230V for single-phase or 400V for three-phase motors).
• Overload Protection: The MCB circuit breaker should provide overload protection based on the motor's characteristics to prevent damage from prolonged excessive current.