ASFETs for hot-swap and soft-start Nexperia has brought out 80V and 100V ASFETs with enhanced SOA performance, targeting hot-swap & soft-start applications in 5G telecom systems & 48 V server environments and industrial equipment needing e-fuse and battery protection. ASFETs are a new breed of MOSFET optimized for use in particular design scenarios. By focusing on specific parameters critical to an application, sometimes at the expense of others that are less important in the same design, new levels of performance can be achieved. The ASFETs use a combination of Nexperia’s latest silicon technology and copper-clip package construction to significantly strengthen the Safe Operating Area (SOA) and minimize PCB area.