The RJF0605JPV is a power switch MOSFET that can control ON/OFF between drain and source by applying voltage to the gate. The gate of the power MOSFET has a built-in overheat cutoff circuit, which protects against abnormal ambient temperature rises, overpower, and overcurrent. It has the function of protecting the power MOSFET by gate cutoff operation against the heat generated by the MOSFET.