3-Pole C-Curve MCB for AC/DC Branch Protection
The Siemens 5SJ4305-7HG42 is a 3-pole miniature circuit breaker from the SENTRON 5SJ4 series, featuring a C tripping characteristic and a rated current of 0.5 A at AC and DC voltages up to 60 V DC. This makes it suitable for protecting lighting, control transformers, and moderate inrush loads in industrial panels.
Mounting and Panel Fit
Occupying 3 modular width units (54 mm) with a depth of 70 mm and height of 121 mm, this MCB mounts on a standard DIN rail in any position. The IP20 (connected conductors) and IP40 (handle range) protection class allows installation in enclosures with IP40 front panels. Terminals are combined top and bottom; tightening torque is 3.5 Nm for Cu conductors at 60/75 °C.
Sourcing and Lifecycle
The 5SJ4305-7HG42 is halogen-free and silicon-free, a standard spec for environments sensitive to outgassing. Suitable for mechanical engineering and general industry use.