When a transistor is used as a switch tfansistor is operated in the saturation and cutoff region as explained above. Allieds handbook of transistor fundamentals author. C547b datasheet npn transistor, circuit, pinout, schematic, equivalent, replacement, data, sheet, manual and application notes. With the printed side facing you the center leg is the base, the right leg is the emitter and the left leg is the collector. Lead free finishrohs compliant psuffix designates compliant. Transistor circuits books this section contains free e books and guides on transistor circuits, some of the resources in this section can be viewed online and some of them can be downloaded. The apidictor was designed in the early 1950s and contained three types of transistor, each of which could be of two specified types, but none of these are in general supply as of the early 2000s. Bc546, ab bc547, abc bc548, abc npn general purpose transistor collector 1 to92 2 base 1 2 3 3 emitter maximum ratings t 25c unless otherwise noted a rating symbol bc546 bc547 bc548 unit collectoremitter voltage veco 65 45 30 vdc collectorbase voltage v 80 50 30 vdc cbo emitterbase voltage vebo 6 6 6 vdc collector current. Npn general purpose transistors, especially suited for use in driver stages of audio. Select a replacement transistor with equivalent ft. A2, august 2002 bc546547548549550 npn epitaxial silicon transistor absolute maximum ratings ta25c unless otherwise noted electrical characteristics ta25c unless otherwise noted hfe classification symbol parameter value units. Mar 10, 2009 all the substitution books i have seen have been highly unreliable. Bipolar transistor, npn, 45v, to92transistor polarity. Bc546, a b bc547, ab c bc548, abc npn general purpose transistor collector 1 to92 2 base 1 2 3 3 emitter maximum ratings t 25c unless otherwise noted a rating symbol bc546 bc547 bc548 unit collectoremitter voltage veco 65 45 30 vdc collectorbase voltage v 80 50 30 vdc cbo emitterbase voltage vebo 6 6 6.
It depends on exactly what the function of the transistor is, but heaps of transistors will substitute for it in a great many situations. Transistors substitutionsequivalents all about circuits. Bc547, bc547 datasheet, bc547 npn general purpose transistor datasheet, buy bc547 transistor. All the substitution books i have seen have been highly unreliable. The original transistor might need special ordering, or be discontinued and unavailable. I keep looking for equivalent transistors, and sometimes find a website that gives a list equivalent transistor. Bc547 is a npn transistor hence the collector and emitter will be left open reverse biased when the base pin is held at ground and will be closed forward biased when a signal is provided to base pin. Texas instruments transistor and diode databook 1st ed 1973 datasheets for diodes from 1n251 on and transistors from 2n117 on acrobat 7 pdf 34. C547c datasheet 45 v, 100 ma npn transistor nxp, bc547c datasheet, c547c pdf, c547c pinout, c547c manual, c547c schematic, c547c equivalent, c547c data. Ul flammability classification rating 94v0 and msl rating 1 marking. I have across this circuit across a lot of forums and was just wondering if i could replace bc547 q1 in the circuit with the commonly used 2n2222 npn transistor. Willen wellknown member may 21, i am not playing with words. Crossreferences are not magic, understanding of the circuit and a parametric search of the important parameters is much more reliable.
Most projects will specify a particular transistor, but if necessary you can usually substitute. The article presents a comprehensive discussion regarding these tiny electronic devices in a very lucid style, explaining bc547 datasheet, their operating principle and how to implement bc547 and the associated parts into. Bc547 is a npn transistor hence the collector and emitter will be left open reverse biased when the base pin is held at ground and will be closed forward biased when a signal is provided to. Pretty good assortment of miscellaneous common transistors, though it would be nice to have the inclusion of some jfets and mosfets bs170, j201, 2n5457, etc. It is notably often the first type of bipolar transistor hobbyists encounter and is often featured in designs in hobby electronics magazines where a generalpurpose transistor is required.
How to make simple electronic circuits using transistor. Free transistor equivalent book transistor bipolar junction. You are far better off understanding the specifications, particular those of particular interest to your application, and using a book or table of specs to find a proper substitute, or posting on sites like aac for help choosing. Everyday low prices and free delivery on eligible orders. Alternatively equivalents to these transistors would help. Bc547 datasheet pdf 45 v, 100 ma, npn transistor nxp. Directions for determining the thermal resistance rths for cooling fins can be found on page 11. Apr 05, 2008 it has been very useful for me because it doesnt provide only the nte replacements. Choosing transistor replacements electronics notes. I calculated the bias point of the preamp transistor with a good hfe of 505, a low hfe of 109 and a high hfe of 807. This section contains free e books and guides on transistor circuits, some of the resources in this section can be viewed online and some of them can be downloaded. Buy international transistor equivalents guide bernard babani publishing radio and electronics books by michaels, adrian isbn.
This is a pdf format of the well known hardware pinout book, which covers various computer, electrical and electronic item pinouts. C547b datasheet, c547b pdf, c547b data sheet, datasheet, data sheet, pdf. International transistor equivalents guide bernard babani. This is identical in every respect to the npn type, except that it is a pnp type.
It has been very useful for me because it doesnt provide only the nte replacements. It is necessary to ensure that the replacement transistor will be able to operate at the relevant frequencies, so a similar or slightly higher ft is advisable. Bc546b, bc547a, b, c, bc548b, c amplifier transistors. Bc 547 npn transistor 45v 100ma hfe 150 specifications.
Apr 02, 2019 bc547 datasheet pdf 45 v, 100 ma, npn transistor nxp, bc547 datasheet, bc547 pdf, bc547 pinout, substitute, bc547 equivalent, data, bc547 circuit. Smallsignal transistors replacement list bc86816 bc868, bc86825 equivalent type bc876 bc878 bc880 bc878 equivalent type bc877 bc879 bcf29 bc857 bcf30 bc857b bcf33 bc847b bcf81 bc847c bcp5110 bcp5310 bcp5210 bcp5310 bcp52 bcp53 bcp5410 bcp5510 bcp6810 bcp68, bcp6825 bcp6816 bcp68, bcp6825. Free transistor circuits books download ebooks online. I have a small circuit which controls the speed of a dc motor as per the ambient temperature. Semiconductor transistor, diode, ic cross reference. Book this book does not require a rating on the quality scale. Building virtually any electronic circuit from these small signal transistors and their complementary pairs may be feasible. Bc547 bc547a bc547b bc547c npn general purpose amplifier.
Transistor substitution desoldering and replacing a transistor takes very little time. The transistor with low hfe might not work well in that circuit so a bc547b or bc547c should be used. Ic cross reference cross reference ci stk cross reference ci tda cross reference ci sharp cross reference hitachi audio ic cross reference and circuit applications smd cross reference and equivalent we make every effort to ensure that the material on this site is accurate, however we do not warrant or represent that the information is free. Wikipedia books can also be tagged by the banners of any relevant wikiprojects with classbook. Bc847 bc547 series 45 v, 100 ma npn generalpurpose transistors rev. Sure, they often have the same average hfe, but it will always be a little off. Aug 20, 2019 great mistake on 4th and 5th transistor. Bc547 has a gain value of 110 to 800, this value determines the amplification capacity of the transistor. Jun 01, 2016 c547c datasheet 45 v, 100 ma npn transistor nxp, bc547c datasheet, c547c pdf, c547c pinout, c547c manual, c547c schematic, c547c equivalent, c547c data. So called equivalent parts, or nte replacements, may not work at all in some cases, because they were worse in some spec, or the circuit was designed with the assumptions that the part had a fairly low bandwidth. The pnp equivalent is the complimentary transistor, which is the bc557. Transistor equivalent circuits and models learning objectives general dc equivalent circuit ac equivalent circuit equivalent circuit of a cb amplifier effect of source resistance r s on voltage gain equivalent circuit of a ce amplifier equivalent circuit of a cc amplifier smallsignal lowfrequency model or representation. Transistor codes surface mount, pnp, npn, choosing.
Bc549xbk general purpose siepitaxial planar transistors npn npn siepitaxial planartransistoren fur universellen einsatz version 20091203 0. Alternatively equivalent s to these transistors would help. Free packages are available maximum ratings rating symbol value unit collector emitter voltage bc546 bc547 bc548 vceo 65 45 30 vdc collector base voltage bc546 bc547 bc548 vcbo 80 50 30 vdc emitter base voltage vebo 6. Join date oct 2004 location west coast posts 7,942 helped 2331 2331 points 74,061 level 66. Transistor bc547 is probably the most elementary of the available electronic active components and yet becomes the basic, vital building block in most electronic circuits. It goes further and it offers exactly what you were talking in this topic, real replacements like the 80s and 90s replacements crossreference books. Suppose you want to test the basic operation of this device by switching a. Bc547 cross reference electronic circuits, tv schematics.
Bc547 datasheet pdf 45 v, 100 ma, npn transistor nxp, bc547 datasheet, bc547 pdf, bc547 pinout, substitute, bc547 equivalent, data, bc547 circuit. Bc547b datasheet, equivalent, cross reference search. Bc548 transistor the bc548 is a generalpurpose npn bipolar junction transistor commonly used in european and american electronic equipment. For miscellaneous breadboarding, this collection seems to have the part i need about 70% of the time, which is nice. Bc547 datasheet, equivalent, cross reference search. More time is spent figuring out which one to replace and, sometimes, what to replace it with. Since the distribution of heat in the transistor crystal is not uniform and depends on voltage and. If a mica insulation is used, the thermal resistance of the mica washer must be added, which amounts to about 0. Design and application of transistor switching circuits.
The complimentary transistor is very useful for symmetrical pushpull amplifier circuits. As prathamesh satardekar has said, 2n2222 is as good as any. Jan 03, 2017 in bc547, you will find that it has three legs. C1815 cross reference electronic circuits, tv schematics. Cross reference universal transistor reference page 1.
Original transistor type original alternative type modern substitute alternative substitute. Wikipedia books are maintained by the wikipedia community, particularly wikiproject wikipedia books. Npn general purpose transistors, especially suited for use in. Bc546b, bc547a, b, c, bc548b, c amplifier transistors npn silicon features pb. Most projects will specify a particular transistor, but if necessary you can usually substitute an equivalent transistor from the wide range available. The initial 2n identifies the part as a transistor and the rest of the code identifies the particular transistor. Knowing how to substitute an alternate transistor type can speed up your. This is a wikipedia book, a collection of articles which can be downloaded electronically or ordered in print.
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