The Hager NDN340A is a 40A, triple pole (TP), Type D miniature circuit breaker (MCB) designed for commercial and industrial electrical distribution systems.
It is specifically engineered to handle high inrush currents, making it suitable for circuits with motors, transformers, and other inductive loads.
Technical Specifications
The device features the following specifications:
Current Rating: 40 Amps.
Trip Curve: Type D, which trips at 10 to 20 times the full load current to prevent nuisance tripping during high-inrush starts.
Breaking Capacity: 10kA (BS EN 60898) and up to 15kA (IEC 60947-2).
Voltage Rating: 400V AC.
Dimensions: Width of 52.5mm (3 modules), Height of 83mm, and Depth of 70mm.
Connection Capacity: Supports up to 25mm² flexible conductors and 35mm² rigid conductors.
Mounting: Standard DIN rail mounting.
| Type | MCB |
| Trip Type | Type D |
| Short Circuit Rating | 10 kA |
| Pole Configuration | TP |
| Current Rating | 40 A |
| Brand | Hager |