200 V, 4 A fast-recovery diode in SMC — what the 30 ns trr buys you
The STTH4R02SY is a standard fast-recovery diode from STMicroelectronics, rated for 200 V DC reverse and 4 A average forward current, housed in an SMC surface-mount package. Its 30 ns reverse recovery time (trr) places it in the fast-recovery class — the datasheet classifies it as Fast Recovery =< 500ns, > 200mA (Io). This trr is the key parameter for switching applications where stored charge during reverse recovery must be minimised to reduce switching losses and EMI.
175°C junction — rated for the under-hood thermal budget
The Q Automotive series designation means this diode is characterised and qualified for the thermal cycling and high-ambient conditions found in engine compartments, transmission controllers, and other under-hood modules.
For a production run, this diode can be specified without worrying about a mid-lifecycle redesign.