LIVE Electrical CN125B 25A Type B 6kA 1P+N Miniature Circuit Breaker (MCB)
The LIVE Electrical CN125B 25A Type B Miniature Circuit Breaker (MCB) provides reliable overload and short-circuit protection for domestic and commercial electrical installations. Specifically designed for LIVE Electrical SRN Dual Busbar consumer units, this compact circuit breaker combines a 25A rated current, Type B tripping characteristic and 6kA breaking capacity in a space-saving single-module design.
Featuring a 1P+N configuration, the CN125B provides overcurrent protection for the live conductor alongside neutral switching. Its Type B tripping characteristic makes it suitable for appropriately designed electrical circuits with low inrush currents, including selected fixed electrical equipment and general-purpose applications.
Operating at a rated voltage of 240V AC and frequency of 50/60Hz, this LIVE Electrical MCB offers a practical circuit protection solution for electricians and electrical contractors working with compatible single-phase distribution systems.
Key Features
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25A Rated Current: Provides overload protection for electrical circuits designed for a 25A protective device.
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Type B Tripping Curve: Suitable for 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 one 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 suitable 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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1.2Nm Terminal Torque: Specified tightening torque for secure electrical connections.
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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 |
CN125B |
| Product Type |
Miniature Circuit Breaker (MCB) |
| Pole Configuration |
1P+N |
| Rated Current |
25A |
| 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 CN125B 25A Type B MCB is suitable for appropriately designed domestic and commercial electrical installations requiring overload and short-circuit protection. Potential applications include:
- Suitably rated radial electrical circuits.
- Fixed electrical appliances with low inrush current characteristics.
- General-purpose circuits requiring 25A Type B protection.
- Domestic and commercial electrical distribution systems.
- Compatible LIVE Electrical SRN Dual Busbar consumer units.
Selection of the correct MCB should take account of circuit design, cable current-carrying capacity, prospective fault current and required disconnection times to ensure compliance with applicable electrical installation requirements.
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