Patent ID: 6960980

Claim:
A circuit component for connection with an electrical circuit, comprising: an insulating member made of an insulating material; a shunt resistor including a shunt resistance portion and a plurality of main electrode portions arranged on both sides of the shunt resistance portion, said shunt resistance portion and said plurality of main electrode portions being formed from one sheet-like resistive material having first and second side surfaces, said first side surfaces being fixedly attached to said insulating member; plates fixedly attached to said second side surfaces of said main electrode portions, each of said plates being lower in volume electric resistivity and higher in thermal conductivity than said sheet-like resistive material; at least one plate electrode provided on each of said plates and electrically connected with said electrical circuit; detection electrodes provided on said plates near said shunt resistance portion and for detecting a voltage generated in said shunt resistance portion, wherein a load current flowing through said shunt resistor is detected; and constricted portions provided on said plates and formed so as to define recessed portions that extend from an outer edge of said plates to said constricted portions, wherein said constricted portions are provided between said plate electrode and said shunt resistance portion such that the load current supplied by said plate electrode flows into said constricted portion in a concentrated manner and flows out of said constricted portions so as to diffuse on said plate.