LIVE Electrical CN140B 40A Type B 6kA 1P+N Miniature Circuit Breaker (MCB)
The LIVE Electrical CN140B 40A Type B Miniature Circuit Breaker (MCB) provides reliable overload and short-circuit protection for domestic and commercial electrical installations. Featuring a 1P+N configuration, 6kA breaking capacity and compact single-module design, this circuit breaker is specifically designed for use with LIVE Electrical SRN Dual Busbar consumer units.
With a 40A rated current and Type B tripping characteristic, the CN140B is suitable for appropriately designed electrical circuits with low inrush currents. Its space-saving construction enables efficient installation within compatible distribution boards, making it a practical solution for electricians and electrical contractors requiring dependable circuit protection.
Key Features
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40A Rated Current: Provides overload protection for electrical circuits designed for a 40A protective device.
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Type B Tripping Curve: Suitable for electrical circuits with low inrush currents and appropriate load characteristics.
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6kA Breaking Capacity: Designed to interrupt short-circuit fault currents up to its rated breaking capacity of 6000A.
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1P+N Configuration: Combines single-pole overcurrent protection with neutral switching in a compact device.
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Single-Module Design: Space-efficient construction helps maximise available capacity within compatible consumer units.
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240V AC Rated Voltage: Designed for suitably rated single-phase electrical installations.
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SRN Dual Busbar Compatibility: Specifically designed for LIVE Electrical SRN Dual Busbar distribution boards.
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IP20 Protection: Provides protection against finger access to hazardous parts.
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10mm² Terminal Capacity: Accommodates conductors up to the specified maximum terminal capacity.
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Wide Operating Temperature Range: Designed for operation in ambient temperatures from -25°C to +40°C.
Technical Specifications
| Manufacturer |
LIVE Electrical |
| Product Code |
CN140B |
| Product Type |
Miniature Circuit Breaker (MCB) |
| Pole Configuration |
1P+N |
| Rated Current |
40A |
| Rated Voltage |
240V AC |
| Tripping Characteristic |
Type B |
| Rated Frequency |
50/60Hz |
| Number of Modules |
1 |
| Short-Circuit Breaking Capacity |
6kA |
| Mechanical Life |
4,000 Cycles (as supplied) |
| Degree of Protection |
IP20 |
| Maximum Terminal Capacity |
10mm² |
| Terminal Tightening Torque |
1.2Nm |
| Operating Temperature |
-25°C to +40°C |
| Compatible Distribution Boards |
LIVE Electrical SRN Dual Busbar Boards |
Applications
The LIVE Electrical CN140B 40A MCB is suitable for appropriately designed domestic and commercial electrical installations requiring Type B overcurrent protection. Potential applications include suitably rated radial circuits, fixed electrical equipment and other circuits with low inrush current characteristics. It is designed for installation within compatible LIVE Electrical SRN Dual Busbar consumer units.
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