High power supplies play a vital role in many aspects of solar photovoltaic cell manufacturing. Functional failures in high-power electronic devices are often caused by inadequate cooling performance. Traditionally, a blowing-type fan is adopted in the forced convection design. In this paper, a suction-type fan with fins is proposed in combination with a heat sink to improve the cooling effect. The effects of different base plate temperature, fin spacing and fan size are also investigated. The base plate temperature, determined by the cooling channel, has a significant effect on forced convection. The results show that increasing the fin spacing facilitates air circulation but results in a slight temperature rise. Under the same P-Q curve, smaller fans achieve higher velocities but result in worse air circulation and higher temperatures over time. The proposed suction-type fan equipped with a heat sink offers a valuable reference for cooling design in high-power electronic modules.