Connector

A connector for being attached to a power-supply unit comprising a switching element, the connector comprising:

• a connecting terminal comprising an end portion connected to an output terminal in a casing of the power-supply unit;
• a housing fixed to the casing and enclosing at least a portion of the connecting terminal, including an inner housing formed from resin;
• a current sensor to detect a magnetic field generated by an electric current flowing through the connecting terminal;
• and
• a signal line for transmitting an output signal of the current sensor,
• wherein the signal line comprises an extension region with a predetermined length from one end on a side of the current sensor, and
• wherein the extension region extends in a direction orthogonal to a direction of electric current flowing through the connecting terminal.