The Niglon MCB6B1-6 6A Type B Miniature Circuit Breaker is a single-pole protective device designed to provide overload and short-circuit protection for suitable electrical circuits.
Featuring a 6 Amp current rating, Type B tripping characteristic and 6kA breaking capacity, this compact MCB is suitable for a range of domestic and light commercial electrical installations, including appropriately designed lighting circuits.
Manufactured to BS EN 60898-1, the MCB6B1-6 features a standard single-module width, DIN rail mounting, bi-directional operation and terminals accepting conductors up to 25mm².
6A Type B Circuit Protection
The Niglon MCB6B1-6 provides a rated current of 6A with a Type B tripping characteristic.
Type B miniature circuit breakers are commonly selected for circuits with relatively low starting currents, such as suitably designed domestic lighting and other low-current electrical circuits.
The MCB automatically disconnects the circuit when an overload or sufficiently high fault current causes it to trip, helping protect the connected wiring and electrical installation.
Type B Tripping Characteristic
The Type B characteristic is designed to respond to instantaneous fault currents typically between 3 and 5 times the rated current, making it suitable for many conventional circuits without high inrush currents.
The correct MCB rating and tripping characteristic must be selected according to the cable, connected load, prospective fault current and installation requirements.
6kA Short-Circuit Breaking Capacity
The MCB6B1-6 has a 6kA (6000A) rated short-circuit breaking capacity in accordance with BS EN 60898-1.
This rating specifies the breaker's ability to safely interrupt a short-circuit fault within its approved operating conditions.
The available fault current at the installation must be assessed to ensure that the selected protective device has an appropriate breaking capacity.
Single Pole DIN Rail Mounting
The Niglon MCB6B1-6 is a single-pole miniature circuit breaker designed for mounting onto a compatible standard DIN rail.
Its compact, single-module construction occupies approximately 18mm of DIN rail space, making it suitable for installation in compatible consumer units and distribution equipment.
The device features a manually operated switching lever that allows the circuit to be switched on or off and reset following a trip, once the cause of the fault has been identified and corrected.
Bi-Directional Operation
Niglon specifies this range of Type B MCBs as bi-directional, allowing current to flow in either direction through the device within its approved ratings and installation requirements.
This provides flexibility for suitable electrical distribution arrangements, subject to the manufacturer's instructions and the design of the complete installation.
25mm² Maximum Cable Capacity
The MCB6B1-6 features screw terminal connections with a manufacturer-specified maximum cable capacity of 25mm².
Niglon specifies a 2.5Nm terminal tightening torque to help provide secure electrical connections when installed with suitable conductors.
The conductor size, termination method and compatibility with the consumer unit must be checked as part of the installation.
BS EN 60898-1 Compliant
The Niglon MCB6B1-6 is manufactured in accordance with BS EN 60898-1, the standard for miniature circuit breakers used for overcurrent protection in household and similar installations.
Niglon lists Semko certification, CE marking and UKCA marking for this MCB range.
Key Features
- Manufacturer: Niglon
- Part Number: MCB6B1-6
- 6 Amp rated current
- Type B tripping characteristic
- 6kA short-circuit breaking capacity
- Single-pole protection
- 230V AC rated voltage
- Bi-directional operation
- DIN rail mounting
- Single-module width
- Maximum cable capacity of 25mm²
- 2.5Nm terminal tightening torque
- BS EN 60898-1 compliant
- Semko, CE and UKCA certification/marking
- Suitable for appropriately designed domestic and light commercial circuits
Technical Specifications
| Manufacturer | Niglon |
| Manufacturer Part Number | MCB6B1-6 |
| HEM Model / SKU | NIG6MCB |
| Product Type | Miniature Circuit Breaker (MCB) |
| Rated Current | 6A |
| Tripping Characteristic | Type B |
| Breaking Capacity | 6kA (6000A) |
| Rated Voltage | 230V AC |
| Number of Poles | 1 Pole |
| Bi-Directional | Yes |
| Mounting Type | DIN Rail |
| Module Width | Single Module (Approx. 18mm) |
| Maximum Cable Capacity | 25mm² |
| Terminal Tightening Torque | 2.5Nm |
| Dimensions (Older Datasheet) | 18mm W x 83mm H x 66mm D |
| Standard | BS EN 60898-1 |
| Certification / Marking | Semko, CE, UKCA |
Dimensions are from an earlier model-specific Niglon datasheet; the current range drawing shows slightly different dimensions. Confirm physical fit and consumer-unit compatibility before installation. An MCB provides overcurrent protection and does not replace an RCD or RCBO where residual-current protection is required.
Why Choose the Niglon MCB6B1-6?
The Niglon MCB6B1-6 6A Type B Miniature Circuit Breaker combines dependable overcurrent protection with compact DIN rail mounting and straightforward installation.
Its 6kA breaking capacity, bi-directional rating and compliance with BS EN 60898-1 make it a practical choice for appropriately designed circuits in compatible consumer units and distribution equipment.
With a single-module design, 25mm² maximum terminal capacity and 2.5Nm tightening torque, the MCB6B1-6 offers a professional circuit protection solution for suitably qualified electrical installers.
Any orders below £75 subject to £6.00 carriage
- Stock: 18
- Model: NIG6MCB
- SKU: NIG6MCB
- MPN: MCB6B 106
