Vceo40v complementary to utc 2n3904 ordering information ordering number pin assignment package packing lead free halogen free 1 2 3 2n3906gab3r sot89 b c e tape reel 2n3906lt92b 2n3906gt92b to92. So you never rely on the current gain of your transistor being a specific value the most you do it rely on it being at least some value. If you measure the collector current through the collectorload resistor for a variety of base currents i. The spice parameters used in the simulation result in a value for these leakage currents that is too large. Discuss transistor models list and define the r parameters describe the rparameter transistor model determine r9e using a formula compare ac beta and dc beta list and define the h parameters r. The 2n3904 is an npn transistor that can only switch onethird the current of the 2n2222 but has otherwise similar characteristics. On special request, this transistor is also manufactured in the pin configuration to18. Free lead finish maximum ratings rating symbol value unit collector.
A 2n3904 transistors beta max value is 150 and min value is 100. Here is the measured relationship for the above 2n3904. Pricing and availability on millions of electronic components from digikey. General purpose transistorsnpn silicon, 2n3904 datasheet, 2n3904 circuit, 2n3904 data sheet.
I have couldnt attach the graph but i am giving these values and the value of beta according to it ib ic beta ic ib 1. The 2n3904 is common generalpurpose lowpower npn transistor used amplifying or switching applications. This is the current gain for a transistor expressed as an h parameter hybrid parameter. The minimum beta for a 2n3904 transistor at 1ma and with a vce of 1. Onsemi, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. It is typically used for lowcurrent, medium voltage, and moderate speed purposes. Features1 bvceo 40v ic 1ma2 complements the umt3906 sst3906 mmst3906 datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors. The values of beta vary from about 20 for high current power transistors to well over for high frequency low power type bipolar transistors. The value of beta for most standard npn transistors can be found in the manufactures data sheets but generally range between 50 200. The 2n3904 exhibits its forward gain beta peak at a lower current than the 2n2222, and is useful in amplifier applications with reduced i c, e. Transistor, npn, to92 online from elcodis, view and download 2n3904 pdf datasheet, transistors bjt single specifications. You should know that spice models are created by curve fitting so the beta value you see may not be the.
Onsemi, alldatasheet, datasheet, datasheet search site for electronic components and. The 2n3904 exhibits its forward gain beta peak at a lower current. The transistor npn important 2n3904 specifications from. Apr 29, 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. Symbol parameter conditions value unit rthja thermal resistance from junction to ambient note 1 250 kw symbol parameter conditions min. The collector to emitter voltage for the beta spec is much higher than it is for a saturated transistor.
Npn general purpose amplifier continued baseemitter saturation voltage vs collector current. Features1 bvceo 40v ic 1ma2 complements the umt3906. The transistor npn important 2n3904 specifications from the. The letter f indicates that it is a forward transfer characteristic, and the letter e indicates it is for a common emitter configuration. Npn transistor tutorial the bipolar npn transistor.
Hi, if you double click on the transistor and select the edit model button, the beta parameter is bf. Multisim tutorial using bipolar transistor circuit. Even the defining parameter the current gain or h fe is not particularly constant and depends on i b. Umt3904 sst3904 mmst3904 2n3904transistorsnpn general purpose transistorumt3904 sst3904 mmst3904 2n3904. Even assuming you were correct and that the output of the opamp was 3. Free packages are available maximum ratings rating symbol value unit collector. New model in lab 1 model parameters for the 2n3904 transistor were determined. Measure the current gain of a 2n3904 transistor using the constant current source circuit from design exercise 61. We will need to use real component when simulating a circuit with a part we use in the physical lab, e. 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. I have got a transistor which has got the following output characteristics. What is the ideal resistance for a 2n3904 base resistor value. It is a 200 ma, 40 v, 625 mw transistor with a transition frequency of 300 mhz, with a minimal beta, or current gain, of 100 at a collector current of 10 ma.
The transistor npn a current amplifier makes small currents bigger the 2n3904 transistor. Pinning pin description 1 emitter 2 base 3 collector, connected to case fig. So one bc107 may have a beta value of 110, while another one may have a beta value of 450, but they are both bc107 npn transistors. It is the factor by which current is amplified in the circuit. This is the basic notation for the forward current gain of a transistor. However, if it is not given, it can be calculated if the currents. Unfollow 2n3904 npn transistor to stop getting updates on your ebay feed. If you measure the collector current through the collectorload resistor for a variety of. Beta, the mathematical relationship between these parameters. However, if it is not given, it can be calculated if the currents, ib the base current and either ie the emitter current or ic the collector current are known. The characteristic curves focus on the output of the transistor, but we can also consider the behavior of the input. How can i find the value of beta of a transistor all. Npn switching transistor 2n3904 thermal characteristics note 1.
When figuring out dc current gain, the beta value is part of the formula. 2n3904, 2n3904 datasheet, 2n3904 npn general purpose transistor datasheet, buy 2n3904 transistor. This transistor is also available in the sot23 case. I want to, and have also managed to use a 2n3904 as a switchbutton, where i use a digital pin connected to the base of the 2n3904 to push the button which is between the emitter and ground. Bc547 is a npn transistor hence the collector and emitter will be left open.
So, if the base current, ib, going into a transistor is 30. Transistors of the same type and part number will have large variations in their beta value. As complementary type, the pnp transistor 2n3906 is recommended. The 2n3904 is used very frequently in hobby electronics projects, including homemade ham radios, codepractice oscillators, analog amplification, and interfacing device for. Beta, the mathematical relationship between these parameters and therefore the current gain of the transistor can be given as.
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