CHINT NB2-40ZT Smart Miniature Circuit Breaker is a smart 1P MCB designed for final power distribution, remote monitoring and smart circuit protection. It combines conventional thermal-magnetic protection with communication and electrical measurement functions, making it suitable for intelligent distribution boards, smart homes, commercial buildings and light industrial control systems.
1. Product overview
The NB2-40ZT belongs to the CHINT NB2 Smart Series and is built for intelligent low-voltage protection. Compared with a conventional MCB, it adds communication, electrical parameter monitoring and configurable overvoltage / undervoltage protection, helping users achieve smarter circuit management without changing the standard DIN rail installation method.
2. Main features
- Smart 1P miniature circuit breaker for digital distribution systems
- Rated current options: 6A, 10A, 16A, 20A, 25A, 32A and 40A
- Type C tripping curve for mixed residential and commercial load protection
- Rated breaking capacity: 6kA
- Rated voltage: AC230V
- Communication protocol: Modbus-RTU via RS485
- Supports remote supervision and integration with smart management platforms
- Electrical parameter measurement for current, voltage and power
- Overvoltage, undervoltage, over-frequency, under-frequency and open-phase protection markings shown in catalogue
- Standard DIN rail mounting for easy retrofit and panel integration
3. Technical specifications
| Item | Specification |
|---|---|
| Series | NB2-40ZT |
| Product type | Smart Miniature Circuit Breaker |
| Rated current | 6A / 10A / 16A / 20A / 25A / 32A / 40A |
| Rated voltage | AC230V |
| Poles | 1P |
| Tripping curve | Type C |
| Mechanical life | 10,000 operations |
| Electrical life | 6,000 operations |
| Rated breaking capacity | 6kA |
| Rated insulation voltage | 690V |
| Rated impulse withstand voltage | 4kV |
| Frequency | 50Hz |
| Communication | Modbus-RTU, RS485 A/B |
| Protection degree | IP20 |
| Standard | DIN rail installation, smart MCB application |
4. Smart protection functions
- Overvoltage protection (OVP)
- Undervoltage protection (UVP)
- Over-frequency protection (OFP)
- Under-frequency protection (UFP)
- Open-phase protection (OPP)
- Remote monitoring and communication-ready smart circuit management
5. Typical applications
- Smart home distribution boards
- Commercial and office distribution panels
- Energy monitoring systems
- Remote electrical control projects
- Intelligent final power distribution systems
6. Available models
According to the catalogue, the NB2-40ZT 1P Type C series includes 6A, 10A, 16A, 20A, 25A, 32A and 40A options, all with 6kA breaking capacity and AC230V rating.
7. Ordering support
If you need help selecting the suitable NB2-40ZT current rating or integrating this smart MCB into your monitoring system, send us your current requirement, control method and communication needs. We can recommend the right model for your application.
8. Original catalogue pages
The following original catalogue pages are attached below for technical verification, dimensional reference and model selection.
