Pdf g4pc50u datasheet download people who viewed this item also viewed. Yet some authors call it a programmable ujt just because its characteristics and parameters have much. Pdf an undergraduate laboratory experiment for measuring the. As it exhibits a negative resistance region, it is used as an oscillator and triggering device. This helps explains the characteristics of a ujt, since we monitor its behavior when different voltage levels are given to it, which in turn, helps us. Njsemi unijunction transistors,alldatasheet, datasheet, datasheet search site for electronic. Nte6402programmable unijunction transistor putdescription. The unijunction transistor characteristics and applications. The ujt is consist of a light doped ntype of silicon bar, there is a heavily doped ptype of region at one side of the ntype of bar.
Although a unijunction transistor is not a thyristor, this device can trigger larger thyristors with a pulse at base b1. No licence is granted for the use of it other than for information purposes in connection with the products to which it relates. Programmable unijunction transistor puta variable threshold, low cost, fast switching speed, d5k2 515. The unijunction transistor ujt thyristors electronics. Diodes and transistors pdf 28p this note covers the following topics. A transistor is an electronic component used to switch electrical currents. If youre after an analogy to the put, think of a reversedpolarity scr with an. It is used in freerunning oscillators, synchronized or triggered oscillators, and pulse generation circuits at low to moderate frequencies hundreds of kilohertz. A zener diode and a unijunction transistor, programmable or not, are as different as night and day. Unijunction transistor applications the most common application of a unijunction transistor is as a triggering device for scr and triac but other ujt applications include sawtoothed generators, simple oscillators, phase control, and timing circuits. Basic semiconductor physics, diodes, the nonlinear diode model, load line analysis, large signal diode models, offset diode model, transistors, large signal bjt model, load line analysis, small signal model and transistor amplification. The transistors are hermetically sealed in a welded package with glasstometal seal. A unijunction transistor is composed of a bar of ntype silicon having a ptype connection in the middle.
The u ni j unction t ransistor is a threeterminal, twolayer, semiconductor device. The unijunction transistor characteristics and applications, type numbers 2n4892n494c, 2n16712n1671c, 2n2160. Unijunction transistor abbreviated as ujt, also called the doublebase diode is a 2layer, 3terminal solidstate silicon switching device. Ujt unijunction transistor tutorial power electronics a to z.
Njsemi, alldatasheet, datasheet, datasheet search site for electronic. Conventional unljljnctions general electric produces a very broad line of standard ujt s. In this case the gate terminal is c onnected to the n region but in thyristor or scr gate is connected with p region, thus the anode and cathode constitute the pn junction which controls the on and off states of put. An ntype unijunction transistor left symbol in above picture is made by implanting a small ptype emitter probe in a bar of ntype silicon. The unijunction transistorujt is a three terminal device with characteristics very different from the conventional 2 junction, bipolar transistor. A unijunction transistor consists of two pieces of silicon.
Introduction to unijunction transistor construction and. Electronics tutorial about the unijunction transistor or ujt and how unijunction transistors can be used as a trigger generator for thyristors and triacs. The programmable unijunction transistor put is an improved version of ujt. Nte6402 programmable unijunction transistor put description. Designed to enable the engineer to program unijunction characteristics such as rbb, iv, and ip by merely selecting two resistor values. Unijunction transistor is also known as doublebase diode because it is a 2layered, 3terminal solidstate switching device. For additional information, see the global shipping program terms and conditions opens in a new window or tab this amount includes applicable customs duties, taxes, brokerage and other fees. Among these three transistors, this article talks about ujt transistors working features and its construction in brief. No licence is granted for the use of it other than for information purposes in connection with the products to. Central semiconductor, unijunction transistors in a to5 case, scan, pdf.
Apr 24, 2017 a unijunction transistor ujt is a threelead electronic semiconductor device with only one junction that acts exclusively as an electrically controlled switc slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Programmable unijunction transistor or put is a close relative of the thyristor family. Unijunction transistor programmable unijunction transistor triggers designed to enable the engineer to program unijunctioi characteristics such as rbb t. The unijunction transistor characteristics and applications, type numbers 2n4892n494c, 2n16712n1671c, 2n2160, 2n24172n2422b sylvan, t. It is a pulse generator with the trigger or control signal applied at the emitter.
The terminals are designated as anode, anode gate, and cathode. Hence, we will start this tutorial with a brief introduction to signals. The unique characteristic feature of this device is such that when it is triggered, the emitter current increases until it is restricted by an emitter power supply. Its has a four layered construction just like the thyristors and have three terminals named anodea, cathodek and gateg again like the thyristors. Free strategy and soldering details, please download the on semiconductor soldering and mounting techniques. Unijunction transistor american microsemiconductor. It has only one junction so it is called as a unijunction device. Unijunction transistor has different characteristics from ordinary bipolar transistor. Unijunction transistor charactertistics curve this unijunction transistor characteristics curve helps explain how a unijunction transistor behaves when differing levels of voltages are fed to it. As current rises through a unijunction transistor, voltage falls, reaches a minimum, then rises again. The simplest of all ujt circuits is the relaxation oscillator producing nonsinusoidal waveforms. An undergraduate laboratory experiment for measuring the energy gap in semiconductors.
These devices may also be used in special thyristor. This device has been characterized as a programmable unijunction transistor put. The functioning of any circuit can be studies by the signal it produces. Our company has achieved widespread recognition in. But put is a four layer pnpn device it also known as small version of thyristors as shown in figure 12. Jul 03, 2019 2n2160 datasheet pdf admin july 3, 2019 no comments 2n datasheet, 2n circuit, 2n data sheet. Its operation is similar to the ujt hence it is always considered with ujt, its trigger voltage vp can be programmed or decided by the designer via external. Discrete semiconductor products transistors programmable unijunction are in stock at digikey. This data sheet and its contents the information belong to the members of the premier farnell group of companies the group or are licensed to it.
The terminals are emittere, baseoneb1 and basetwob2. Mar 20, 2020 2n2160 datasheet pdf 2n datasheet, 2n circuit, 2n data sheet. Ujt is a threeterminal, singlejunction, twolayered device, and it is similar to a thyristor compare to a transistors. The nte6402 is a 3terminal silicon planer passivated pnp device available in the standard plasticlow cost to98 and to92 type packages. Unijunction transistor the unijunction transistorujt is a three terminal device with characteristics very different from the conventional 2 junction, bipolar transistor. New jersey semiconduct 2n, unijunction transistors. These devices may also be used in special thyristor application. A unijunction transistor ujt is a threelead electronic semiconductor device with only one. Pdf an undergraduate laboratory experiment for measuring. I know i can substitute a 2n6028 put that will do the job but i need to know the values of the programming resistors to make the substitution work.
Download pspice for free and get all the cadence pspice models. The circuit calls for a 2n4891 unijunction transistor which is now obsolete and very expensive. A unijunction transistor ujt is a threelead electronic semiconductor device with only one junction that acts exclusively as an electrically controlled switch. With only one pn junction, the device is really a form of diode. The 2n2646 model is the most commonly used version of the ujt.
As it exhibits a negative resistance region, it is used as an oscillator. Pulse circuits 2 a signal not only carries information but it also represents the condition of the circuit. How to use a unijunction transistor know about life. Put programmable unijunction transistor construction of put. Programmable unijunction transistor programmable zener. Unijunction transistors, 2n2160 datasheet, 2n2160 circuit, 2n2160 data sheet. Since the device has one pn junction and three leads, it is commonly called a unijunction transistor. Unijunction transistor and ujt relaxation oscillator. Substituting a 2n6028 for a 2n4891 unijunction transistor. If youre after an analogy to the put, think of a reversedpolarity scr with an extremely sensitive gate. Jun 25, 20 the circuit calls for a 2n4891 unijunction transistor which is now obsolete and very expensive. Put programmable unijunction transistor construction of put the construction of put programmable uni junction transistor is similar to that of scr, it has four layer of semiconductor material pnpn or npnp structure, with three junction j1 j2 and j3, terminal which is connected to the ptype material is called anode and the terminal which is. The device hasa unique characteristic that when it is triggered, its emitter current increases re generatively due to negative resistance characteristic until it is restricted by emitter power supply. Nte6402 datasheet12 pages nte programmable unijunction.
The construction of put programmable uni junction transistor is similar to that of scr, it has four layer of semiconductor material pnpn or npnp structure, with three junction j1 j2 and j3, terminal which is connected to the ptype material is called anode and the terminal which. The nte6402 is a 3terminal silicon planer passivated pnp device available in the standard plastic low cost to98 and to92 type packages. Application includes thyristortrigger, oscillator, pulse and timing circuits. The terminals are designated as anode, anode gate, andcathode. Designed to enable the engineer to program unijunction characteristics such as rbb. Apr 23, 2020 2n2160 datasheet pdf politics 2n datasheet, 2n circuit, 2n data sheet. A unijunction transistor ujt is a threelead electronic semiconductor device with only one junction that acts exclusively as an electrically controlled switc slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Programmable ujt, put construction, working and theory.
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