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OnBuy.com£8.05Visit shop Crabtree 61/B10 6 Amp Miniature Circuit Breaker Mcb Starbreaker 6Ka Type B 5017399034726
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This guide is for electricians and homeowners needing a reliable circuit breaker for standard electrical circuits. The Crabtree 61/B10 Starbreaker MCB offers robust protection against overcurrents and short circuits with its Type B tripping characteristic, suitable for residential and light commercial applications. A key consideration is its plug-in design, which requires a compatible busbar system.
| Series | Starbreaker |
|---|---|
| Model Part Number | 61/B10 |
| Brand | Crabtree |
Type B indicates the MCB's tripping characteristic. It will trip between 3 to 5 times its rated current (10A), making it suitable for circuits with low inrush currents, like lighting and socket outlets.
It is best suited for standard appliances and circuits with low inrush current. Appliances with high startup currents (e.g., large motors, some heating elements) may require a Type C or Type D MCB.
The plug-in design allows for quicker and simpler installation into compatible distribution boards, as it connects directly to the busbar system without the need for screw terminals for the main connection.
Your distribution board must have a busbar system specifically designed to accept plug-in type Miniature Circuit Breakers with a spade connector on the bottom. Consult your distribution board's manual or a qualified electrician.
The breaking capacity is 6kA (6,000 Amps), meaning it can safely interrupt fault currents up to this level.
You can replace an old MCB if it has the same electrical rating (10 Amp), Type (B), and physical form factor (plug-in) and is compatible with your distribution board's busbar system. Always ensure the power is isolated before replacement.
This may indicate a persistent overload or a fault on the circuit. Check for appliances drawing excessive current. If the issue persists, a professional electrician should inspect the circuit and the MCB.
Ensure the MCB is correctly seated on the busbar. If it is properly installed and still won't latch, there might be an internal fault with the MCB or damage to the busbar. Isolate power and consult an electrician.
A slightly warm MCB may be normal under load, but if it is excessively hot, this indicates a poor connection or an overload. Immediately switch off the circuit and have it inspected by a qualified electrician.
Setup: This MCB is designed for direct plug-in installation onto a compatible busbar within a distribution board or consumer unit. Ensure the power supply to the distribution board is isolated and locked off before attempting any installation. Align the spade connector on the bottom of the MCB with the corresponding slot on the busbar and push firmly until it is securely seated. Connect the line conductor to the terminal on the MCB. The neutral and earth conductors should be connected to their respective busbars.
Compatibility: Crucially, this is a plug-in type MCB. It requires a distribution board or consumer unit that features a compatible busbar system designed to accept this specific plug-in mechanism. It is not compatible with MCBs that require screw-in connections or busbars with different slot configurations.
Care: Like all circuit protection devices, the Crabtree Starbreaker MCB requires minimal user care. Ensure the consumer unit is kept clean and free from dust and moisture. Periodically, during routine electrical inspections, visually check the MCB for any signs of damage or overheating. Regular professional inspection of the entire electrical installation is recommended.
