MBR0520LT1G B2 MBR0520LT1G TEL:88834448 MBR0520LT1G 肖特基二极管 MBR0520LT1G(B2F) MBR0520LT1G/MBR0520L MBR0520LT1G0SCT-ND MBR0520LT1H MBR0520L-T1-LF MBR0520LT3 MBR0520LT3G