Hager MCB 63A Triple Pole Type D Curve NDN363A

Hager NDN363A: 63A 3 Pole D Curve Miniature Circuit Breaker (MCB) with 10kA breaking capacity and a compact 3-module width for consumer units and distribution boards.

Safety & Reliability

This Hager mini circuit breaker protects circuits against both overload current and short circuit faults, with a trip-free mechanism that prevents the toggle being held closed during a fault condition. The D curve tripping characteristic makes it suited to circuits with high inrush currents, such as motors and transformers, reducing nuisance tripping on start-up. Isolation status is shown clearly by the green "OFF" position on the toggle, so electricians can confirm a circuit is safely isolated at a glance.

Installation & Compliance

Rated to BS EN 60898-2 (10kA) and BS EN 60947-2 (15kA at 400V, 30kA at 230V), this hager miniature circuit breaker gives installers a documented breaking capacity for both domestic and light industrial distribution boards. Terminals accept up to 25mm² flexible or 35mm² rigid conductor, covering a wide range of cable sizes without needing adaptors. A rated insulation voltage of 500V and impulse withstand of 6kV support installations in pollution degree 2, overvoltage category III environments.

Compact, Space-Saving Design

At just 3 modules wide with a 70mm recess depth, this mcb electrical device fits standard DIN rail enclosures without eating into valuable board space, useful when retrofitting additional circuits into an existing consumer unit. The IP20 enclosure rating gives basic protection against accidental contact with live parts once installed behind a cover.

Control & Isolation

Beyond fault protection, the NDN363A also functions as a manual isolator and control switch for the circuit it protects, letting contractors isolate three-phase loads safely during maintenance or testing without removing the breaker from the board.

Key Features of the Hager NDN363A Miniature Circuit Breaker Include:

• Protects Against Overload And Short Circuit Faults Via A Trip-Free Mechanism
• D Curve Characteristic Suited To High Inrush Loads Such As Motors & Transformers
• Doubles As A Manual Isolator & Control Switch For Maintenance Work
• Clear Green "Off" Toggle Position Confirms Safe Isolation At A Glance
• Rated Current: 63A
• Poles: 3 Pole (Triple Pole Protection)
• Module Width: 3 Modules
• Recess Depth: 70mm
• Rated Voltage: 400V AC, 50Hz
• Breaking Capacity: 10kA (Bs En 60898-2) / 15kA At 400V & 30kA At 230V (Bs En 60947-2)
• Rated Insulation Voltage: 500V; Impulse Withstand: 6kV
• Ingress Protection: IP20
• Connection Capacity: 25mm² Flexible / 35mm² Rigid Conductor
• Ambient Operating Temperature: -25°C
• Compliant With Bs En 60898-2 & Bs En 60947-2

If you need some help, would like to take advantage of our Price Promise or have a large order to place, give our team of professionals a call on 0203 994 5470, drop us an email at sales@electricpoint.com or use our Contact Form.