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nm8-125s-3p-40a chint 40a 3p adjustable thermal mccb
Chint NM8-125S-3P-40A moulded case circuit breaker with 40A rated current, 3-pole configuration, adjustable thermal magnetic trip unit and 50kA breaking capacity for low-voltage electrical distribution.
£86.53
Why Choose the Chint NM8-125S-3P-40A MCCB?
The Chint NM8-125S-3P-40A is a high-performance moulded case circuit breaker (MCCB) engineered to provide reliable protection against overloads and short circuits in low-voltage electrical distribution systems. As part of the proven Chint NM8 series, it delivers dependable performance for commercial, industrial and OEM applications where robust circuit protection is essential.
Equipped with an adjustable thermal magnetic trip unit, the NM8-125S-3P-40A combines thermal overload protection with instantaneous magnetic short circuit protection. The adjustable overload setting allows the breaker to be matched to cable capacities and connected equipment, improving protection coordination whilst maintaining installation flexibility.
With a 40 A rated current, 3-pole configuration and 50 kA breaking capacity, the NM8-125S-3P-40A is ideally suited to three-phase distribution boards, machinery, motor control centres and industrial switchboards requiring dependable MCCB protection.
Key Advantages
- Reliable moulded case circuit breaker for low-voltage protection.
- 40 A rated current for commercial and industrial electrical systems.
- 3-pole configuration for three-phase power distribution.
- 50 kA short circuit breaking capacity.
- Adjustable thermal magnetic trip unit for flexible protection.
- Provides dependable overload and short circuit protection.
- Compact design suitable for switchboards and control panels.
Key Features
- Chint NM8 series MCCB.
- 40 A rated current.
- 3-pole construction.
- 50 kA breaking capacity.
- Adjustable thermal magnetic protection.
- Suitable for AC 50 / 60 Hz systems.
- Designed for low-voltage electrical distribution.
- Panel and switchboard mounting.
Reliable MCCB Protection for Electrical Distribution
The Chint NM8-125S-3P-40A provides dependable protection for electrical circuits by disconnecting the supply during overload and short circuit conditions. This helps safeguard cables, switchgear and connected equipment whilst supporting the safe operation of industrial and commercial installations.
Its compact frame, adjustable protection characteristics and high interrupting capacity make it suitable for panel builders, electrical contractors and maintenance engineers working across a wide range of low-voltage distribution systems.
Typical Applications
- Three-phase distribution boards.
- Industrial control panels.
- Motor control centres.
- Commercial electrical installations.
- Manufacturing and production facilities.
- OEM machinery and automation equipment.
Technical Specifications
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| Mounting Type | Fixed | |
|---|---|---|
| Application | Power distribution | |
| Current | 40 A | |
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | MCCB | |
| Breaking Capacity | 50 kA | |
| Trip Unit | Thermal-magnetic | |
| Manufacturer | Chint | |
| Series | NM8 | |
| Model | NM8-125S-3P-40A | |
| Product type | Moulded Case Circuit Breaker (MCCB) | |
| Rated current | 40 A | |
| Number of poles | 3 Pole | |
| Trip unit | Adjustable thermal magnetic | |
| Breaking capacity | 50 kA | |
| Rated operational voltage | Up to 690 V AC | |
| Rated insulation voltage | 800 V | |
| Rated impulse withstand voltage | 8 kV | |
| Frequency | 50 / 60 Hz | |
| Protection functions | Overload and short circuit protection | |
| Mounting type | Panel / switchboard mounting | |
| Standard | IEC/EN 60947-2 | |
| Barcode | 6940092415143 |
Frequently Asked Questions
What is the Chint NM8-125S-3P-40A used for?
It protects three-phase low-voltage electrical circuits against overloads and short circuits in commercial and industrial applications.
What is the rated current of this MCCB?
The NM8-125S-3P-40A has a 40 A rated current.
How many poles does this breaker have?
This breaker has a 3-pole configuration for three-phase electrical systems.
What breaking capacity does this MCCB provide?
The NM8-125S-3P-40A provides a 50 kA short circuit breaking capacity.
What type of trip unit does this breaker use?
It features an adjustable thermal magnetic trip unit providing overload and instantaneous short circuit protection.
Trusted by Electrical Professionals Worldwide
Chint NM8 moulded case circuit breakers are trusted by electrical engineers, panel builders and contractors to deliver reliable low-voltage protection across commercial and industrial installations.
