Part identity and key ratings
The 5SJ4340-7HG42: Rated for 400 V AC (also 60 V DC maximum), the breaker covers typical three-phase loads up to the specified breaking limits. The C-curve trips between 5x and 10x rated current, suited for moderate inrush from motors and transformers.
Mounting and enclosure details
Occupies 3 modular width units (54 mm) and fits any standard mounting rail. Overall dimensions are 54 mm wide, 70 mm deep, and 121 mm high. Installation depth matches the 70 mm depth, so panel clearance is straightforward. Mounting position is any orientation. Combined terminals (screw/clamp) at both top and bottom; tunnel terminals not present. The breaker is sealable, halogen-free, and silicon-free, meeting clean-environment requirements for electronics or food processing.
Lifecycle and sourcing
Rated for mechanical engineering/industry; vibration resistance 50 m/s² (25–150 Hz) and 60 m/s² at 35 Hz.