The ES3A-E3/9AT: The ES3A-/9AT is a Vishay standard recovery rectifier rated for 50 V reverse and 3 A average forward current, packaged in a DO-214AB (SMC) surface-mount case. Its 30 ns reverse recovery time (trr) places it in the fast-recovery class, suited for switching power supplies and freewheeling diodes where the recovery charge must be kept low to limit ringing and switching loss.
Forward voltage and thermal budget
Maximum forward voltage is 900 mV at 3 A, 25°C junction. The -55°C to 150°C junction range covers cold-start and high-ambient environments, but the leakage current at 50 V reverse is 10 µA at 25°C — expect it to rise with temperature, so derate the reverse voltage if the junction runs above 125°C.