Hager MCB 50A Single Pole Type D Curve NDN150A

Hager NDN150A: 50A 1 Pole D Curve Miniature Circuit Breaker (MCB) with 10kA/15kA short-circuit breaking capacity for demanding load applications.

Safety & Reliability

This mini circuit breaker protects circuits against both overload current and short circuits, with a trip-free mechanism that guarantees the contacts open even if the toggle is held. The D curve tripping characteristic suits loads with high inrush currents, such as motors and transformers, without nuisance tripping.

Clear Isolation & Control

A green "OFF" indicator on the toggle shows the isolation state at a glance, so electricians and site staff can confirm a circuit is safely dead before working on it. Simple toggle operation gives reliable manual control alongside automatic protection.

Installation & Compliance

Single module width (1 x 17.5mm) keeps consumer units and distribution boards compact. Terminals accept up to 25mm² flexible or 35mm² rigid conductors, giving installers flexibility on cable size without needing adaptors. This Hager miniature circuit breaker is tested to BS EN 60898-2 (10kA) and BS EN 60947-2 (15kA), so it meets recognised UK wiring regulations for both domestic and industrial-grade installations.

Built for Harsh Environments

Rated for continuous operation down to -25°C, this MCB electrical component is suited to unheated plant rooms, outbuildings, and exposed enclosures. A 6kV impulse withstand voltage and 500V insulation voltage rating give it a wide safety margin against transient surges.

Key Features of the Hager NDN150A Miniature Circuit Breaker Include:

• Protects Against Overload Current & Short Circuits
• Trip-Free Mechanism For Guaranteed Isolation
• Green "OFF" Toggle Indicator For Clear Isolation Status
• D Curve Characteristic Suited To High Inrush Loads
• Compact Single Module (1 Way) Design Saves Panel Space
• Rated Current: 50A
• Rated Voltage: 400V AC, 50Hz
• Breaking Capacity: 10kA (BS EN 60898-2) / 15kA (BS EN 60947-2)
• Rated Insulation Voltage (Ui): 500V
• Rated Impulse Withstand Voltage (Uimp): 6kV
• Over Voltage Category: III, Pollution Degree: 2
• Operating Temperature: Down To -25°C
• Ingress Protection: IP20
• Connection Capacity: 25mm² Flexible / 35mm² Rigid Conductor
• Complies 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.