irf3205, FET, the gate of the power MOSFET pin junction type field identifying FET equivalent base of the transistor, the source and drain correspond to the transistor emitter and collector in the field effect tube pole. The multimeter R × 1k file, along with the two leads were used to measure positive and negative resistance between two pins each. When positive and negative resistance between two pins of a MOS transistor is equal 7n60, when both the number of KΩ MOS tube 6n60, then the two pins for the drain D and source S (interchangeable), and the remaining one tube foot is the gate G. For four pin junction FET, the other pole is shielded pole (use ground). g40n60, FET, power MOSFET, IGBT MOSFET transistor with the main difference in the electrical characteristics are the following: SMD FET FET 1: FET is a voltage-controlled device MOS tube 10n60, tube conductive depending on the level of the gate voltage. Transistor is a current control device, the conductive case of the tube depends on the size of the base current. 2: FET drain-source voltage characteristic static gate voltage UGS for parametric transistor output characteristic curve to the base current Ib as the reference variable. 3: the relationship between the current IDS and the gate of FET between UGS determined by the transconductance Gm, the relationship between transistor current Ic and Ib by the amplification factor β decision. In other words, the ability to zoom with Gm measure FET amplification capability of the transistor with β measure. 4: Input impedance is large tube MOS FET, the input current is very small; small transistor input impedance, input current is larger when the conductive. 5: General FET power is small, large power transistor. MOS tube 7n60_ are fertile Electronics (certified) _MOS tube provided by the Dongguan City is fertile Electronic Technology Co., Dongguan City is Wal-Electronic Technology Co., Ltd. (www.dgmydz.com) is Dongguan, FET leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Wal-electronics leader in the positive with the staff warmly welcome all inquiries negotiations to create a positive future Wal-electron better.