Current transducer with integrated primary conductor bar

An electrical current transducer comprising a primary conductor bar for carrying the current to be measured, a magnetic core having a magnetic circuit gap, a magnetic field sensor having a magnetic field detector positioned in the magnetic circuit gap, and an insulting housing surrounding the magnetic core and the magnetic field sensor, wherein the primary conductor bar comprising connection terminal ends extending outside of the insulating housing configured for connection terminal ends extending outside of the insulating housing configured for connection to an external primary conductor, the primary conductor bar further comprises a core passage section which includes a fuse portion configured for interruption of the primary conductor if a predefined electrical current is exceeded, the core passage section having a reduced width (W1) in comparison to the connection terminal ends extending outside of the insulating housing thereby providing indents within which at least a portion of the magnetic core is positioned such that a central passage of the magnetic core has a width (W3) less than a width (W2) of the connection terminal ends of the primary conductor bar.