Jan 02, 2020 · One of the various parameters of the 2N3904 transistor is known as the beta, or current gain, which is the ratio of the collector current to the base current. For a current gain of 100, a change of 0.001 ampere (A) in base current results in a change of 0.1 A on the collector. This suggests how the 2N3904 transistor can become an amplifier.
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2N3904 fT 250 300 − − MHz Output Capacitance (VCB = 5.0 Vdc, IE = 0, f = 1.0 MHz) Cobo − 4.0 pF Input Capacitance (VEB = 0.5 Vdc, IC = 0, f = 1.0 MHz) Cibo − 8.0 pF Input Impedance (IC = 1.0 mAdc, VCE = 10 Vdc, f = 1.0 kHz) 2N3903 2N3904 hie 1.0 1.0 8.0 10 k Voltage Feedback Ratio (IC = 1.0 mAdc, VCE = 10 Vdc, f = 1.0 kHz) 2N3903 2N3904 hre 0.1 0.5 5.0 8.0 X 10−4
Data Sheet (current) [683 KB ] ST MICRO [69 KB ] ... TRANSISTOR, 2N3904, NPN GENERAL PURPOSE, SMALL SIGNAL, 40V, TO-92 For more about Transistors, click here. 2N3904 General Purpose Transistors NPN TO-92 Page 1 12/05/08 V1.1 High Speed Switching Features: • NPN silicon planar switching transistors. • Fast switching devices exhibiting short turn-off and low saturation voltage characteristics.
www.vishay.com Since the 2N3904 is an NPN transistor, that means the base needs positive biasing (appropriate voltage levels and resistance) to turn on the collector emitter junction for proper current flow. Use of a load resistor (R1 above) is also important so there is not too much current being driven through the LED and transistor.
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2N3904 Signal Transistor. Catalog №: 2762016. $2.00 Sold-out Online. Request notification Find a store. Tweet. Maximum Power Dissipation: 350 mW. Maximum Collector ... 2N3904 General Purpose Transistors NPN TO-92 Page 1 31/05/05 V1.0 High Speed Switching Features: • NPN Silicon Planar Switching Transistors. • Fast switching devices exhibiting short turn-off and low saturation voltage characteristics.
Compare pricing for ON Semiconductor 2N3904G across 16 distributors and discover alternative parts, CAD models, technical specifications, datasheets, and more on Octopart. (For the above measured 2N3904, the Early voltage ranges from 100 to 150 V. That is the extrapolated characteristic curves do not intersect at a point.) The actual relationship between the collector current (I C) and the controlling base current (I B) and collector-emitter voltage drop (V CE) is some complicated function which we can denote: The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications. It is designed for low current and power, medium voltage, and can operate at moderately high speeds.
Although this works fine, I'm a bit concerned about what I've read on the data sheet for the 2N3904. It states that the Base-Emitter Saturation Voltage has the following specs: Ic = 10mA Ib = 1.0mA Ic = 50mA Ib = 5.0mA. I'm having a hard time understanding what that means exactly. Oxford University Press USA publishes scholarly works in all academic disciplines, bibles, music, children's books, business books, dictionaries, reference books, journals, text books and more. 2N3904 fT 250 300 − − MHz Output Capacitance (VCB = 5.0 Vdc, IE = 0, f = 1.0 MHz) Cobo − 4.0 pF Input Capacitance (VEB = 0.5 Vdc, IC = 0, f = 1.0 MHz) Cibo − 8.0 pF Input Impedance (IC = 1.0 mAdc, VCE = 10 Vdc, f = 1.0 kHz) 2N3903 2N3904 hie 1.0 1.0 8.0 10 k Voltage Feedback Ratio (IC = 1.0 mAdc, VCE = 10 Vdc, f = 1.0 kHz) 2N3903 2N3904 hre 0.1 0.5 5.0 8.0 X 10−4
On the test board, with 2N3904 transistor, VM1 show ~12V and ~6V when SW is pushed (as expected). When trying to go to SMD components, I am using MMBT3904, but it seem to behave differently: Showing about 6V indifferently of the state of SW1.Additionally, the collector voltage seem to contaminate the base voltage. Exact shipping can be calculated on the view cart page (no login required).. Products that weigh more than 0.5 KG may cost more than what's shown below (for example, test equipment, machines, heavy bench gear).