Chint NM8S-400S-3P-400A 400A 3 pole electronic moulded case circuit breaker with adjustable electronic trip unit for industrial and commercial low voltage power distribution.
£869.07
The Chint NM8S-400S-3P-400A is a reliable electronic moulded case circuit breaker (MCCB) designed to provide dependable overload and short-circuit protection for low voltage power distribution systems. Built for industrial and commercial applications, it offers accurate fault protection and adjustable settings for improved coordination within electrical installations.
As part of the Chint NM8S Series, this breaker uses an adjustable electronic trip unit, allowing protection settings to be tailored to suit the application. This makes it suitable for switchboards, distribution panels, feeder circuits and machinery supplies where reliable circuit protection and operational continuity are essential.
With a 400A rated current, 3-pole configuration and 50kA breaking capacity, the NM8S-400S-3P-400A is well suited to three-phase electrical systems in manufacturing facilities, commercial buildings, infrastructure projects and industrial control environments.
The Chint NM8S-400S-3P-400A helps protect electrical installations by automatically disconnecting circuits during overload and short-circuit fault conditions. Its electronic release allows engineers to adjust protection settings, supporting better selectivity and coordination across low voltage distribution networks.
Its compact MCCB format and high breaking capacity make it suitable for use in industrial panels, commercial distribution boards and feeder circuits where reliable protection and safe isolation are required.
| Current | 400 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | Chint |
| Series | NM8S Electronic MCCB |
| Model | NM8S-400S-3P-400A |
| Product type | Electronic moulded case circuit breaker |
| Rated current | 400A |
| Frame size | 400S |
| Number of poles | 3 Pole |
| Trip unit | Adjustable electronic release |
| Rated operational voltage | Up to 690V AC |
| Rated insulation voltage | 800V |
| Rated impulse withstand voltage | 8kV |
| Breaking capacity | 50kA |
| Frequency | 50 / 60Hz |
| Mounting type | Fixed installation |
| Protection functions | Overload and short-circuit protection |
| Standard | IEC/EN 60947-2 |
It is used to provide overload and short-circuit protection for three-phase low voltage industrial and commercial power distribution systems.
The NM8S-400S-3P-400A has a 400A rated current.
This model has a 3-pole configuration, making it suitable for three-phase electrical distribution systems.
It uses an adjustable electronic trip unit, allowing protection settings to be adapted for improved system coordination.
It is commonly installed in industrial switchboards, commercial distribution panels, feeder circuits and machinery control systems.
Chint NM8S electronic MCCBs are trusted by panel builders, electrical contractors and engineers for reliable circuit protection, adjustable electronic protection settings and dependable performance in demanding low voltage installations.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...