International Rectifier has launched two automotive-qualified MOSFETs. The two devices, the AUIRF1324WL and AUIRF3004WL automotive- qualified MOSFETs are each housed in a WideLead TO-262 package that is claimed to reduce lead resistance by 50% compared to traditional TO-262 packages. They are designed for generic heavy load or high power through-hole applications requiring low Rds(on), electric power steering and battery switches used in internal combustion engine cars, and micro and full-hybrid vehicles. The standard TO-262 through-hole packages, source and drain leads can add up to 1mΩ resistance, in addition to the Rds(on). The through-hole package reduces lead resistance to less than half a mΩ, reducing conduction losses and heating in the leads to deliver 30% more current carrying capability than a traditional TO-262 package for a given operating temperature. The lead temperature was 30% cooler than the standard TO-262 at DC currents of 40A and 39% cooler at 60A. According to the company, other packaging enhancements allow the WideLead to deliver 20% lower Rds(on) compared with the same MOSFET in a standard TO-262 package. The AUIRF1324WL exhibits 1.3 Rds (on) at 10VGS (mΩ) and the AUIRF3004WL is 1.4 Rds (on) maximum at 10vGS (mΩ). Both devices are qualified to AEC-Q101.
