



Crabtree 61/B50 Starbreaker 1 Module Single Pole B Curve/Type B Miniature Circuit Breaker MCB 50A 6kA
61/B50
Starbreaker 1 Module Single Pole B Curve MCB – Reliable 50A Circuit Protection
The Starbreaker Single Pole Miniature Circuit Breaker (MCB) provides essential overcurrent protection for residential and commercial installations. Designed with a B Curve tripping characteristic, it ensures fast response to short circuits and overloads while maintaining stability for low inrush current circuits.
- Rated Current: 50A – Ideal for protecting small lighting and socket circuits.
- B Curve Tripping Characteristic: Trips between 3-5 times the rated current, suitable for general-purpose applications.
- Breaking Capacity: 6kA – Ensures reliable short-circuit protection in domestic and light commercial environments.
- Single Pole Configuration: Protects individual circuits while maintaining system integrity.
- Compact 1-Module Design: Saves space in distribution boards for efficient installation.
- DIN Rail Mounted: Easily integrates into Starbreaker consumer units and compatible enclosures.
- Standards Compliant: Manufactured to BS EN 60898 for assured safety and performance.
Technical Specification
- Current Rating: 50A
- Tripping Curve: B Curve
- Breaking Capacity: 6kA
- Voltage Rating: 230/400V AC
- Pole Configuration: Single Pole
- Module Size: 1
- Mounting: DIN Rail
- Standards Compliance: BS EN 60898
✅ Ensure safe and efficient circuit protection with the Starbreaker 50A B Curve MCB!

Ean Code | 5017399116439 |
Range | Starbreaker |
Trip Type | B Curve |
Short Circuit Rating | 6kA |
Product | MCB |
Type | Single Pole |
Ingress Protection | IP20 |
Voltage | 230|400 V |
Pole Configuration | Single Pole (1P) |
Current Rating | 50A |
Standards | BS EN 60898 BS 7671 EN 50274/60529 |
Number Of Poles | Single Pole (1P) |
Number Of Modules | 1 |
Delivery Options:
- PRIORITY DELIVERY – Next Working Day (All items in stock and ordered before 3 pm) - £7.08 inc-VAT. (£5.90 ex-VAT)
- STANDARD DELIVERY – 2–3 Working Days From Despatch (subject to stock availability) - £4.99 inc-VAT. (£4.16 ex-VAT)
- Orders Over £100 (before VAT): We offer free standard shipping on all orders shipped to UK mainland addresses
- Orders under £100 (before VAT): Our standard delivery fee to UK mainland addresses is £5.90 ex-VAT (£7.08 inc-VAT)
*Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £12 ex-VAT for all orders (Prices subject to change).
Items requiring specialist shipping:
- Orders containing Solar Panels, Batteries and/or Inverters: Up to 50 qty will be dispatched on a pallet and incur a £120 ex-VAT delivery charge**.
**Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £180 ex-VAT (Prices subject to change).
Contact us if you have any further questions.