Highreliability discrete products and engineering services since 1977 2n2646, 2n2647 silicon unijunction transistor rev. In addition, these devices are much faster switches. Digitron semiconductors, 2n2647, silicon unijunction transistor. N channel junction field effect transistors, depletion mode type a designed for audio and switching.
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. Programmable unijunction transistor programmable unijunction transistor triggers designed to enable the engineer to program unijunction characteristics such as rbb, iv, and ip by merely selecting two resistor values. I cant tell for sure if the spice code is accurate or not, since the only circuit i have handy is the test circuit from the philips datasheet and have no results to compare. Unijunction transistor 2n2646 of 2n2646 transistor 2n2647 2n2646. The original unijunction transistor, or ujt, is a simple device that is essentially a bar of ntype semiconductor material into which ptype material has been diffused somewhere along its length, fixing the device parameter the intrinsic standoff ratio. Philips, alldatasheet, datasheet, datasheet search site for electronic. The 2n2646 is the most commonly used version of ujt. I semiconductors encourages customers to verify that datasheets are current. Silicon pn unijuction transistor, 2n2646 datasheet, 2n2646 circuit, 2n2646 data sheet. With completion of capacitor discharge the ujt will again return to normal off state and will stay in that state until the capacitor discharges again.
Free and are rohs compliant maximum ratings note 1 rating symbol. Unit datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors. The 2n2646 is intended for general purpose industrial applications where. Aug 12, 2019 2n2647 datasheet pdf shop magnetic and reed switches. Together with lacysprovided link and the philips datasheet, i created the 2n2646 component. May 17, 2019 2n2647 datasheet pdf highreliability discrete products and engineering services since 2n, 2n silicon unijunction transistor. Buy your 2n2647 from an authorized multicomp pro distributor. Solid state mfg has been datashet leading supplier of semiconductors to the battery charger, plating, welding, oil field, locomotive, and rail transport industries for over 40 years. The resistance of rb1, the saturation resistance is lowest at the valley point.
Diagram details datasheet, cross reference, circuit and application notes in pdf format. Comset semiconductors 2n2646, and, 2n2647 datasheet pdf. Silicon planar unijunction transistors have a structure resulting in lower saturation voltage, peakpoint. Highreliability discrete products and engineering services since 1977. Aug 28, 2019 2n2647 datasheet pdf highreliability discrete products and engineering services since 2n, 2n silicon unijunction transistor. Ujt2n2646 pin diagram details datasheets context search. Philips silicon unijunction transistor,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. The central semiconductor 2n2646 and 2n2647 devices are silicon pn unijunction transistors designed for general purpose industrial applications. Unijunction transistor, to18 online from elcodis, view and download 2n2646 pdf datasheet, transistors unijunction ujt specifications. Introduction to unijunction transistor construction and.
Getting to know the ujt, april 1970 popular electronics rfcafe. Buy 2n2647 multicomp pro unijunction ujt transistor, 2 a, 1 a, 10 ma, to18, 3 pin, 125 c at element14. The data sheet for a 2n2646 unijunction transistor gives the intrinsic. Original unijunction transistor or ujt is a simple device in which a bar of ntype semiconductor material into which ptype material is diffused.
Buy 2n2647 multicomp pro unijunction ujt transistor, 2 a, 1 a, 10 ma, to18, 3 pin, 125 c at farnell. Although a unijunction transistor is not a thyristor, this device can trigger larger thyristors with a pulse at base b1. Spice model 2n2646 ni community national instruments. I recently came across someone asking for the same component. The 2n2647 is a silicon pn unijunction transistor designed for use in pulse and timing circuits, sensing circuits as well thyristor trigger circuits. Boca, alldatasheet, datasheet, datasheet search site for electronic components.
Solid state mfg has been a leading supplier of semiconductors to the battery charger, plating, welding, oil field, locomotive, and rail transport industries for over 40 years. The device is popular as a triggering device and is not suited for driving power loads. The basic ujt and its variations are essentially latching switches whose operation is similar to the fourlayer diode, the most significant difference being that the ujts switching voltage can be easily varied by the circuit designer. The unijunction transistor ujt thyristors electronics. The 2n2646 is designed for use in pulse and timing circuits, sensing circuits and thyristor trigger circuits. To92 ujt 2n4870 ujt 2n2646 oscillators of ujt 2n2646 ujt transistor ujt. Complementary silicon plastic power transistors these devices are designed for use in general. Download 2n2647 datasheet from boca semiconductor corporation. In fact, the relaxation oscillator was one of the most popular uses of the ujt. Download 2n2647 datasheet from central semiconductor. Electronics tutorial about the unijunction transistor or ujt and how unijunction. Ujt 2n2646 specification 2n2646 ujt scr 2n2646 put 2n2646 2n2647 scr firing inverter circuit 2n2646 ujt 2n2646 ratings ujt 2n2646 range text. Jun 26, 2019 2n2647 datasheet pdf highreliability discrete products and engineering services since 2n, 2n silicon unijunction transistor. In addition, thesedevices are much faster switches.
Unijunction transistor and ujt relaxation oscillator. The unijunction transistor ujt workforce libretexts. Silicon unijunction transistor, 2n2646 datasheet, 2n2646 circuit, 2n2646 data sheet. The 2n2646 is a silicon unijunction transistor with 30v emitter to base voltage. The unijunction transistor, abbreviated ujt, is a threeterminal, singlejunction device.