Product Specifications
| Parameter | Specification | Unit |
|---|---|---|
| Product Model | NXB-63 | - |
| Product Type | Miniature Circuit Breaker (MCB) | - |
| Standard | GB/T 10963.1, IEC 60898-1 | - |
| Certification | CCC, CE | - |
| Main Function | Overload protection, Short-circuit protection | - |
| Rated Current (In) | 1, 2, 3, 4, 6, 10, 16, 20, 25, 32, 40, 50, 63 | A |
| Rated Operating Voltage (Ue) | 230V (1P, 1P+N, 2P); 400V (2P, 3P, 3P+N, 4P) | V |
| Rated Insulation Voltage (Ui) | 500 | V |
| Rated Frequency | 50 | Hz |
| Tripping Curve | B, C, D | - |
| Pole Number | 1P, 1P+N, 2P, 3P, 3P+N, 4P | - |
| Mechanical Endurance | 20000 | Operations |
| Electrical Endurance | 10000 | Operations |
| Rated Short-Circuit Breaking Capacity (Icn) | 6000 / 10000 (2P/230V) | A |
| Service Short-Circuit Breaking Capacity (Ics) | 6000 / 7500 (2P/230V) | A |
| Rated Impulse Withstand Voltage (Uimp) | 4 | kV |
Maximum Power Loss Per Pole
| Rated Current (In) | Maximum Power Loss | Unit |
|---|---|---|
| In ≤ 10A | 3 | W |
| 10A < In ≤ 16A | 3.5 | W |
| 16A < In ≤ 25A | 4.5 | W |
| 25A < In ≤ 32A | 6 | W |
| 32A < In ≤ 40A | 7.5 | W |
| 40A < In ≤ 50A | 9 | W |
| 50A < In ≤ 63A | 13 | W |
1p
2p
3p
4p
Product Overview
The NXB-63 series Miniature Circuit Breaker (MCB) is a low-voltage protection device designed for terminal distribution systems. It provides reliable protection against overload and short circuits in electrical circuits. The product complies with **GB/T 10963.1 and IEC 60898-1 international standards** and has obtained **CCC and CE certifications**. It is suitable for residential buildings, commercial facilities, industrial distribution systems, and control applications. The NXB-63 series offers multiple rated current options from **1A to 63A**, supports **B, C, and D tripping characteristics**, and provides various pole configurations including **1P, 1P+N, 2P, 3P, 3P+N, and 4P** to meet different low-voltage electrical distribution requirements. With high mechanical and electrical endurance, the circuit breaker provides reliable protection performance. The rated short-circuit breaking capacity can reach up to **10kA**, improving the safety and stability of low-voltage power distribution systems.
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