A circuit component comprising a circuit board and a terminal for mounting the circuit board on a second circuit board. A length of the circuit board is 10 mm-80 mm, a difference in a coefficient of thermal expansion between the circuit board and the second circuit board is 0.2×10−5/° C. or greater. The terminal is made of an elastic material, and comprised of a first connection section, a second connection section and an elastic section disposed between the first and second connection sections, and the terminal separates the circuit board from the second circuit board by 0.3 mm-5 mm. In the circuit components of the present invention, deterioration in the conduction between the circuit board and the second circuit board due to heat cycles can be prevented. Thus, a circuit component having stable operating characteristics for a long period of time is obtained.