In this case the 7812 is used as just the voltage reference for the 2n3055 pass transistor. The 2n3055 is a silicon npn transistor in a to3 type case designed for general purpose switching and amplifier applications. Alright so i am making a flyback transformer driver, however, in the schematic it asks for a 2n3055 transistor. I show how to test a 2n3055 power transistor using a digital multi meter. Vce limits of the transistor that must be observed for reliable operation. Complementary silicon power transistors aredesigned for. Procure from the market or fabricate the heatsink plate as per the specifications.
While rated at 5 amps collector current they can provide the needed current gain and voltage isolation for the pnp mj2955. Mj2955 are complementary silicon power transistors manufactured by the epitaxial base process, mounted. Power dissipation 25c dc current gain hfe 4 a vce sat 1. The 2n3055 is a npn epitaxialbase planar transistor that normally comes encapsulated in a metal jedec to3 package. What elements in china make this possible there is a lot of metal in a to3 case. It is intended for power switching circuits, series and shunt regulators, output stages and high fidelity amplifiers. The installation of the 2n3055 would involve the following steps. Due to this feature, the transistor is commonly used for amplification of audio or other low power signals. Given that the heatsinks are typically made of metal, you want a large portion of the transistor s case to be in physical contact with the heatsink but not in electrical contact see diagram to the right. When an electric field is applied, the electrons move in the direction opposite. An excellent choice for a predrivers for both the 2n3055 and mj2955 are the tip120 and tip125 complementary darlington power transistors.
Silicon highpower npn transistor designed for use in power switching. It is designed for general use in a variety of electronics. The 2n3055 transistor has a power dissipation of 115w. Apply and spread some heatsink paste over the lead side flat surface of 2n3055. It also has decent switching characteristics transition frequency is 100mhz hence can amplify lowlevel signals. Like any other transistor 2n3055 has three pins namely emitter, base and collector. Internal schematic diagram october1995 absolute maximum ratings symbol. Replacement and equivalent transistor for the 2n3055. Mar 20, 2018 sl100 is a general purpose low power transistor. Some transistor cases, such as with the 2n3055, act as the transistor s collector. Semiconductor transistor, diode, ic cross reference. Mar, 2020 the 2n3055 transistor is a diamondshaped electronic device designed to control the movement of energy in larger operating systems. This transistor operates at 50 amperes a, 60 volts v, and 115 watts w. Theory of transistors and other semiconductor devices 1.
It can be used for the various application like switching circuits, amplifying circuits, and manufacturing of the logic gates etc. This circuit is boost on final transistor power amplifier 2n3055 mj2955, this modif in final stage amplifier by adding more 2n3055 and mj2955 about adding 8 set transistor. The historicallysignificant 2n3055 was designed by herb meisels engineering group with rca. Many of these, typically one or two per atom in the metal, are free to move about throughout the metal. Complementary power transistors stmicroelectronics. Transistors absorb volts and transform them into watts of energy. Control the flow of electricity in your electronic equipment. Motorola reserves the right to make changes without further notice to any products herein. Dec 21, 2017 the 2n5551 is an npn amplifier transistor with an amplification factor hfe of 80 when the collector current is 10ma. The 1967 rca transistor manual, sc, did not mention any measure of high frequency. Motorola semiconductor technical data npn silicon power transistor 1 kv switchmode series, value. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does motorola assume any liability arising out of the application or use of any product or circuit.
Aug 05, 2016 i show how to test a 2n3055 power transistor using a digital multi meter. The basic application range include power switching, high fidelity amplification, shunt regulation, and forming the output stages of various power circuits. Utc 2n3055 silicon npn transistor silicon npn transistors the utc 2n3055 is a silicon npn transistor in to3 metal case. Jan 24, 20 for the best answers, search on this site mosfets are a type of transistor but they dont function like a bijunction transistor, like the 2n3055. The complementary pnp transistor to the 2n3055 is the mj2955. Sep 26, 2018 2n3055 datasheet pdf 15 a, 60 v npn bipolar power transistor, 2n3055 pdf, 2n3055 pinout, substitute, equivalent, data, circuit, output. The exact performance characteristics depend on the manufacturer and. The 2n3054 and 2n3055 were derived from the 2n1486 and 2n1490 after package redesigns by milt grimes.
Electronic manufacturer, part no, datasheet, electronics description. In some side notes the person said that instead they used a 2n6673 npn power transistor. Because the 2n3055 is a bipolar junction transistor, its three terminals are called the base, the collector and the emitter. Mospec semiconductor, 2n3055, power transistors15a,50v,115w. Drill holes as per the dimensions of the transistor leads and fixing holes, as shown in the diagram.
If you see the pass transistor as an emitter follower amplifier where the load is not shown, you see that the output voltage will be just the 7812 voltage minus a vbe drop. A datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors. It must be a strange world in china when they can purposely put a 1 amp transistor into a to3 case and sell it as a 2n3055 15 amp transistor and make a profit. Conduction in metals metals are filled with electrons. It is intended for power switching circuits, series and shunt.
The device is designed for general purpose switching and amplifier applications. The 2n3055 transistor, like all transistors, is essentially an electronic switch. Npn silicon rf transistor for lowdistortion broadband output amplifier stages in antenna and. A voltage applied through a resistor to the base can control the current flowing from the collector to the emitter. Motorola, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. I was wondering, would just any power transistor work. Page 2 of 4 electrical characteristics t ambient25.
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