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Chint NBH8-40-B32 MCB – 1P+N – B Curve – 32A – 4.5kA
Chint NBH8-40-B32 32A B curve 1P+N miniature circuit breaker designed for overload and short-circuit protection in low voltage electrical distribution systems.
£7.50
Why Choose the Chint NBH8-40-B32 Miniature Circuit Breaker?
The Chint NBH8-40-B32 is a compact and dependable 32 A miniature circuit breaker (MCB) designed to protect low voltage electrical circuits against overload and short-circuit faults. As part of the Chint NBH8-40 series, it provides reliable circuit protection for residential, commercial and light industrial distribution systems.
This MCB features a B curve tripping characteristic, making it suitable for circuits with low inrush current such as lighting, resistive loads and general power distribution. Its 1P+N configuration combines live pole protection with neutral switching in a compact modular design, helping save valuable space inside distribution boards and control panels.
With a rated current of 32 A and a 230/240 V AC operating voltage, the NBH8-40-B32 is ideal for final circuit protection where safe switching, isolation and dependable fault protection are required. The device is designed for 35 mm DIN rail mounting, allowing quick installation in professional electrical enclosures.
Key Advantages
- Compact 32 A miniature circuit breaker for final circuit protection.
- B curve tripping characteristic for low inrush current circuits.
- 1P+N configuration for live protection and neutral switching.
- Protects circuits against overload and short-circuit faults.
- Suitable for 230/240 V AC low voltage distribution systems.
- DIN rail mounting for fast installation in consumer units and control panels.
Key Features
- Chint NBH8-40 miniature circuit breaker series.
- 32 A rated current.
- B curve trip characteristic.
- 1P+N pole configuration.
- 230/240 V AC rated operational voltage.
- Designed for overload and short-circuit protection.
- Suitable for isolation and circuit switching.
- Compact modular design for distribution boards.
Reliable Protection for Low Voltage Circuits
Miniature circuit breakers such as the Chint NBH8-40-B32 automatically disconnect the circuit when excessive current is detected. This helps protect cables, electrical equipment and connected loads from damage caused by overloads or short circuits.
The B curve trip profile is commonly used for circuits where the expected inrush current is relatively low. This makes the NBH8-40-B32 suitable for general distribution, lighting circuits, resistive loads and similar electrical installations requiring dependable protection in a compact DIN rail format.
Typical Applications
- Residential consumer units and final distribution boards.
- Commercial electrical distribution panels.
- Lighting circuits and resistive load circuits.
- Small power and auxiliary distribution circuits.
- Control panels and panel board installations.
- Low voltage circuit isolation and switching applications.
Technical Specifications
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| Phase | Single Phase | |
|---|---|---|
| Current | 32 A | |
| Poles | 1-pole + N | |
| Device Type | MCB | |
| Trip Curve | B curve | |
| Breaking Capacity | 4.5 kA | |
| Manufacturer | Chint | |
| Series | NBH8-40 | |
| Model | NBH8-40-B32 | |
| Product type | Miniature circuit breaker | |
| Rated current | 32 A | |
| Trip curve | B curve | |
| Number of poles | 1P+N | |
| Rated operational voltage | 230/240 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated insulation voltage | 500 V | |
| Rated impulse withstand voltage | 4 kV | |
| Breaking capacity | 4.5 kA or 6 kA depending on version | |
| Standard | IEC/EN 60898-1 | |
| Energy limiting class | Class 3 | |
| Protection degree | IP20 | |
| Mechanical life | 20,000 operations | |
| Electrical life | 10,000 operations | |
| Mounting type | 35 mm DIN rail | |
| Terminal connection | Cable or pin-type busbar | |
| Operating temperature | -5°C to +40°C | |
| Dimensions (W × H × D) | approx. 44 × 86 × 60.7 mm |
Frequently Asked Questions
What is the Chint NBH8-40-B32 used for?
The Chint NBH8-40-B32 is used to protect low voltage electrical circuits against overloads and short circuits in residential, commercial and light industrial distribution systems.
What current rating does this MCB have?
This miniature circuit breaker has a rated current of 32 A.
What does B curve mean on the NBH8-40-B32?
The B curve trip characteristic is designed for circuits with low inrush current, such as lighting circuits, resistive loads and general distribution circuits.
What pole configuration does this circuit breaker use?
The NBH8-40-B32 uses a 1P+N configuration, providing live pole protection with neutral switching in a compact DIN rail device.
Where is this MCB typically installed?
It is typically installed on a 35 mm DIN rail inside consumer units, distribution boards or electrical control panels.
Trusted by Electrical Installers Worldwide
Chint NBH8 miniature circuit breakers are widely used by electrical installers, panel builders and maintenance engineers to deliver compact, dependable circuit protection for low voltage distribution applications.
