650 V CoolMOS™ CFD7A – the automotive traction and DC-DC MOSFET
The CFD7A series targets hard-switching topologies in automotive environments: traction inverters, on-board chargers, DC-DC converters, and high-voltage PFC stages. The 650 V rating gives headroom for 400 V nominal bus systems under load dump and transient overvoltage conditions.
Rds(on) is specified at 99 mOhm maximum at 12.5 A, Vgs=10 V — this is the conduction-loss anchor for thermal design. Paired with a total gate charge of 53 nC at Vgs=10 V, the part balances low conduction loss against moderate switching loss; it is not the lowest-Qg device in the 650 V class, but the CFD7A body diode is optimised for fast reverse recovery, reducing hard-switching turn-on loss in bridge legs. Input capacitance Ciss is 2513 pF at Vds=400 V, which sets the gate-driver current requirement.
The PG-TO220-3 package provides a low thermal resistance path through the exposed metal tab — the PCB heatsink pad and mounting torque directly affect RthJC.