1SMA5939BT3G ON丝印839B 稳压二极管 39V DO-214AC/SMA 1N5939
1N5939B_R2_00001《SILICON ZENER DIODE》
1N5939C 1N5938C 1N5940C 1N5941C 1N5942C 1N5943C 1N5952C 正品