bat43w 我有1盘，挺好用，指标比较接近。
features
low forward voltage drop
fast switching time
surface mount package ideally suited for automatic insertion
marking: s8
maximum ratings and electrical characteristics, single diode @ta=25℃
peak repetitive peak reverse voltage
working peak
dc blocking voltage
vr:30 v
rms reverse voltage vr(rms) 21 v
forward continuous current ifm 200 ma
repetitive peak forward current @t<1.0s ifrm 500 ma
peak forward surge current @<10ms ifsm 4.0 a
power dissipation pd 200 mw
thermal resistance junction to ambient rθja 500 ℃/w
storage temperature tstg -55~+125 ℃
reverse recovery time ( trr): 5 ns
