A Hager 3-pole miniature circuit breaker rated for 100 A is designed for three-phase circuit protection. These breakers safeguard against overload and short-circuit conditions by interrupting current when it exceeds the set rating.
Typical Specifications (for common Hager 3P-100A models):
Poles: 3P (three live conductors)
Rated Current: 100 A
Rated Voltage: 415 V AC (three-phase)
Break Curve: Typically B-curve, C-curve, or D-curve depending on application (B for lighting/normal loads, C for general loads, D for high inrush).
Breaking Capacity: Often 10 kA or 15 kA depending on version and standards (IEC 60898-1/IEC 60947-2).
Mounting: DIN-rail (standard 35 mm)
Installation: Recessed or flush in distribution panels
IP Rating: IP20 (indoor use)
Modules Width: ~9 modular units wide
Typical Curve Types:
B-curve: Standard domestic/lighting circuits
C-curve: General circuits & mixed loads (motors, etc.)
D-curve: High inrush loads
Application: Protects three-phase branch circuits from overload and short-circuit.
This class of breaker (e.g., HMF390T for 10 kA or HMC390T for 15 kA) is suitable for residential, commercial, and light industrial three-phase applications where a 100 A rating is needed.
The HAGER mjn510a is a higher-spec industrial breaker assembly often used in heavy-duty panels and switchgear where a robust 100 A protection device is required in a more industrial setting — ideal for larger loads or harsher electrical environments.
100 A rating makes this breaker suitable as a main or branch-circuit breaker in three-phase panels.
Choose the appropriate trip curve (B, C, or D) based on your load type — C-curve is most common for general use.
Breaking capacity (e.g., 10 kA vs 15 kA) should match or exceed your system’s fault current potential.
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