This overview compares the miniature circuit breaker Miniature Circuit Breaker CNC NV821457 1-Pole 32A C-Curve 6kA with similar alternatives from the same brand: CNC NV821440 1-Pole 25A C-Curve 6kA, CNC NV821464 1-Pole 40A C-Curve 6kA, CNC NV821556 3-Pole 32A C-Curve 6kA, CNC NV821426 1-Pole 16 Amps C Characteristic 6kA Breaking Capacity, and CNC NV821624 4P 32A Class C 6kA. All featured products belong to the modular circuit protection category, sharing a 6kA breaking capacity, C tripping curve, and a common purpose of safeguarding residential and commercial electrical installations. The main differences lie in their rated current and pole counts, which determine their suitability for specific load types and electrical network configurations.
⚙️ The specifications comparison below covers key parameters such as the number of poles, rated current, tripping characteristic, breaking capacity, and the practical application of each model within power distribution systems.
| Parameter | CNC NV821457 (32A, 1P) | CNC NV821440 (25A, 1P) | CNC NV821464 (40A, 1P) | CNC NV821556 (32A, 3P) | CNC NV821426 (16A, 1P) | CNC NV821624 (32A, 4P) | Practical Conclusion |
|---|
| Number of Poles | 1-Pole | 1-Pole | 1-Pole | 3-Pole | 1-Pole | 4-Pole | Determines the number of protected phase lines (1P for single-phase circuits, 3P and 4P for three-phase networks). |
| Rated Current | 32 A | 25 A | 40 A | 32 A | 16 A | 32 A | Current rating must be strictly matched to cable cross-section and total connected appliance power. |
| Tripping Curve | C-Curve | C-Curve | C-Curve | C-Curve | C-Curve | C-Curve | The universal C-curve suits most residential and commercial loads with moderate inrush currents. |
| Breaking Capacity | 6 kA | 6 kA | 6 kA | 6 kA | 6 kA | 6 kA | Ensures safe interruption of short-circuit currents in standard distribution panel environments. |
◎ The suitability and use cases comparison below helps determine which model best matches specific electrical tasks and load requirements.
| Use Case | Recommended Product | Why |
|---|
| Protecting standard single-phase general-purpose socket lines up to 32A | CNC NV821457 1-Pole 32A C-Curve 6kA | Provides the optimal current rating for heavy-duty household lines and socket groups. |
| Protecting lighting lines or lower-power groups up to 16A | CNC NV821426 1-Pole 16 Amps C Characteristic 6kA Breaking Capacity | The 16A rating perfectly matches standard cable cross-sections used for lighting fixtures. |
| Protecting lines with medium energy consumption up to 25A | CNC NV821440 1-Pole 25A C-Curve 6kA | Suitable for individual heavier single-phase appliances requiring a dedicated moderate rating. |
| Protecting lines with elevated current loads up to 40A | CNC NV821464 1-Pole 40A C-Curve 6kA | Designed for higher current demands in single-phase circuits with appropriately sized cabling. |
| Protecting three-phase consumers or 32A three-phase distribution | CNC NV821556 3-Pole 32A C-Curve 6kA | The three-pole configuration allows simultaneous protection of three phases in distribution panels. |
| Protecting three-phase networks requiring neutral switching at 32A | CNC NV821624 4P 32A Class C 6kA | The four-pole module provides simultaneous disconnection of three phases and the neutral conductor. |
The CNC NV821457 1-Pole 32A C-Curve 6kA circuit breaker is an excellent choice for protecting single-phase electrical circuits with loads up to 32 amperes, filling the gap between 16A, 25A, and 40A models. It is recommended when your estimated single-phase line load exceeds the capacity of standard 16A or 25A breakers but does not require upgrading to three-pole or four-pole versions.
