00338nam a2200133Ia 450000100040000000500170000400800410002102000150006208200160007710000210009324500230011426000180013765000490015581820261006003500.0120911s9999    xx            000 0 und d  a0534923607  a621.317 FIS  aFisher Marvin J.  aPower electronics   aPws-Kent Pub.  aPower electronics  2. Semiconductor switches