PURPOSE: A field coil assembly is provided to simply perform an assembling process by securely fixing a diode to a bobbin and to prevent a temperature fuse from being separated. CONSTITUTION: A field coil assembly(A) comprises a bobbin(100) and a diode(300). The bobbin has a coil drawing unit(101). The diode is accepted in a receiving part(200) formed in the bobbin and has a tangent line part connected to the drawn coil. A receiving groove(220) for the tangent line part is formed in the receiving part. A terminal fixing groove(230) is formed in the receiving part.
