Current sensor

A current sensor comprising:

• a busbar made of an electrically conductive metal and configured to allow a current from a measured object to flow therethrough,
• wherein the busbar includes a first portion having a belt shape and a second portion,
• wherein the second portion protrudes in a direction of protrusion from one end edge of the first portion, the direction of protrusion intersecting front and back faces of the first portion;
• a magnetic flux concentrating plate made of a soft magnetic material,
• wherein the magnetic flux concentrating plate has an orthogonal cross-section shape having a bent-plate shape surrounding, in a C-shape, a middle portion of the first portion of the busbar in a busbar longitudinal direction, the orthogonal cross-section shape extending orthogonally to the busbar longitudinal direction,
• wherein the magnetic flux concentrating plate is configured to concentrate magnetic flux around the middle portion, the magnetic flux being generated due to a current which may flow through the busbar,
• wherein an opened portion of the C-shape is opened in the direction of protrusion;
• and
• a sensor section including a Hall element for current detection,
• wherein the Hall element is positioned so as to be surrounded by the magnetic flux concentrating plate while being positioned between the opened portion and the middle portion so that the Hall element detects the current through the magnetic flux concentrated by the magnetic flux concentrating plate.