To choose the right Terasaki MCB for your application, consider the following parameters:
1. Rated Current (In)
- Choose according to the load current.
- Common ratings: 1A to 63A.
2. Number of Poles
- 1P – Single-phase circuits.
- 2P – Single-phase with neutral.
- 3P – Three-phase without neutral.
- 4P – Three-phase with neutral.
3. Breaking Capacity (Icu)
- Depends on system fault level.
- Common values: 6kA, 10kA (as per IEC 60898 or IEC 60947-2).
4. Tripping Characteristics (Curve Type)
- B Curve: Suitable for resistive loads (lighting, heating).
- C Curve: For general use – inductive and motor loads.
- D Curve: High inrush current loads (transformers, large motors).
5. Voltage Rating
- Ensure compatibility with system voltage (e.g., 230/400V AC).
6. Standards Compliance
Terasaki MCBs conform to IEC 60898 and/or IEC 60947-2.