1 power switching transistor 2metal sealing 3 19.5gram per ... The product structure: Silicon bipolar NPN power switching transistor,silicon NPN extension flat type, metal hermetic sealing2 ... widely used in switch circuit, amplifier circuit, etc.Para namesymbolsDK150ADK150BDK150CDK150DDK150EDK150FDK150JDK150Hunitcollector-base voltage (IE=0)VCBO300350400450500550600700Vcollector-emitter voltage ( ...