Vrt comparison table for semiconductors from a to z. If more than a maximum voltage rating is applied to a transistor, it can be permanently damaged. Electrical engineering news and products electronics engineering resources, articles, forums, tear down videos and technical electronics howtos. Should you find any info that can fill in any of the blanks in the matrix below. Dont go for a transistor with a much higher ft as this may increase the risk of oscillation. On means current is flowing through the transistor therefore vbe. Transistor equivalents for the substitution of modern. Wikipedia books can also be tagged by the banners of any relevant wikiprojects with classbook.
Free transistor circuits books download ebooks online. Alternatively equivalents to these transistors would help. Although the software seems a bit ugly design running on dos, but it works perfectly with the database with many components and is free, makes an interesting tool to interested in electronics, want to know when information about a particular component or find a replacement. Bipolar power transistor selection guide january 2003 table of contents product page general purpose transistors horizontal deflection output transistors product page dpak d2pak sot223 ipak to126 todarlington transistors dpak ipak to126 to220 to220f to3p to3pf switching transistors dpak d2pak to92 to126. Jun 25, 2018 smd devices are, by their very nature, too small to carry conventional semiconductor type numbers. Transistor cross reference, equivalent and specification is very important for every electronic repairer the importance of transistor cross reference, datasheet, equivalent and specification.
Transistor equivalent c945 may be insufficient information to determine an accurate replacement device. Transistors substitutionsequivalents all about circuits. Searching the right transistor for substitution is a skill, if you replace wrong specifications of transistor. World transistor equivalents data az by eca author 4. Searching the right transistor for substitution is a skill, if you replace wrong specifications of transistor i. Crossreferences are not magic, understanding of the circuit and a parametric search of the important parameters is much more reliable. Apr 05, 2008 it has been very useful for me because it doesnt provide only the nte replacements. Years ago there were books for transistor equivalents. Without knowing its usage, you have to make sure the replacement transistor meets or exceeds every spec, since you dont know which ones the circuit relies on. Wikipedia books are maintained by the wikipedia community, particularly wikiproject wikipedia books. The transistor equivalent circuit can now be evolved with the twopole formulae for the transistor fundamental circuit in fig. Nobelprisen is a set of annual international awards bestowed in several categories by swedish and norwegian institutions in recognition of academic, cultural, or scientific advances. Download book 200 transistor circuits talking electronics.
Silicon rf power transistor the mrf6406 is designed for 1. This page contains list of freely available e books, online textbooks and tutorials in transistor circuits. Transistor substitution desoldering and replacing a transistor takes very little time. Rca transistor thyristor and diode manual sc14 and a great selection of related books, art and collectibles available now at. Smd devices are, by their very nature, too small to carry conventional semiconductor type numbers. At the maximum voltage, also called a breakdown voltage bv, electrons. Johnson a great book for learning electronics in easy plain language. More time is spent figuring out which one to replace and, sometimes, what to replace it with. 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. Understanding transistor replacement, substitution and. Download ic database equivalent guide 100 thousand.
Instead, a somewhat arbitrary coding system has grown up, where the device package carries a simple two or threecharacter id code. 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. View forum posts private message view blog entries view articles full member level 5 join date jun 2005 posts 240 helped 45 45 points 4,206 level 15. 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. Look for something an npn transistor might be called an rf transistor, of course with similar or somewhat higher ft, similar or somewhat lower cob, and hfe in the same range to make it more likely it oscillates, and similar or somewhat higher pd, vceo, and ic to make sure it doesnt burn out. Most have a way to say i need a transistor like this. Book this book does not require a rating on the quality scale. Alternatively equivalent s to these transistors would help. B688 datasheet pnp silicon power transistors mospec. Finding transistor replacement can take you hours if you dont know the right method to do it. These can occasionally be found on ebay, usually advertised as germanium devices. The importance of transistor cross reference, datasheet, equivalent and specification.
The id printed on components can be misleading, and is sometimes a shortened version of all the info needed for an accurate crossreference. But all this is some ones idea of what a equivalent is. 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. Vrt comparison table for semiconductors from a to z edition. Cross reference universal transistor reference page 1. Dodgy ebay replacements are available but im aware that this is not necessarily the best route to go down. Everyday low prices and free delivery on eligible orders. The will of the swedish chemist, engineer and industrialist alfred nobel established the five nobel. I keep looking for equivalent transistors, and sometimes find a website that gives a list equivalent transistor.
In certain cases, the quoted collector current may be exceeded. Free transistor circuits books download ebooks online textbooks. All the substitution books i have seen have been highly unreliable. Understanding transistor cross reference, equivalent.
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. Pnp b772 transistor replacement electrical engineering. Hi, im currently repairing an amp with 2sb688a and 2sc5179 npn pnp complementary pair output transistors. Look for something an npn transistor might be called an rf transistor, of course with similar or somewhat higher ft, similar or somewhat lower cob, and hfe in the same range to make it more likely it oscillates, and similar or somewhat higher pd, vceo, and ic to make sure it doesnt burn out package is up to you whether you want to try to duplicate it or not that one to106.
Bel188 datasheet, equivalent, cross reference search. Diodes and transistors pdf 28p this note covers the following topics. Choosing transistor replacements electronics notes. Obsolete transistor equivalents all about circuits. Texas instruments transistor and diode databook 1st ed 1973 datasheets for diodes from 1n251 on and transistors from 2n117 on acrobat 7 pdf 34. 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. Original transistor type original alternative type modern substitute alternative substitute. Mullard soon switched to using the bc prefix for silicon, and ac for germanium, eliminating the confusion. 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. B688 datasheet pnp silicon power transistors mospec, 2sb688 datasheet, b688 pdf, b688 pinout, b688 equivalent, data, circuit, output, b688 schematic.
Transistor equivalents for the substitution of modern transistors in elderly projects. Bel188 transistor datasheet pdf, bel188 equivalent. International transistor equivalents guide bernard babani. Mullards first silicon transistors were the oc201 to oc207, pnp alloy types using the standard so2 metaloverglass construction such as the oc201 shown. A substitute transistor must have the same polarity, either pnp or npn, as the original.
Allieds handbook of transistor fundamentals author. If you install the wrong polarity, the sandwich wont work. The data sheet is very important for every engineers and technicians because it can help them to find the nearest replacement for the components that they are. Looking for equivalent transistor electrical engineering. It has been very useful for me because it doesnt provide only the nte replacements. 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. Pls i need transistor equivalent of ztx300 and 2n3705. Simple circuit stereo audio amplifier with ic lm386. Tube ac 188 or rohre ac188 id33703, transistor, wires and poweroutput shown. Understanding transistor replacement, substitution and information is very important for a electronic repairer. The original transistor might need special ordering, or be discontinued and unavailable. All electronic repairers should know how to read the transistor cross reference equivalent book if they want to succeed in electronic repairs. Select a replacement transistor with equivalent ft. Check our section of free e books and guides on transistor circuits now.
Design and application of transistor switching circuits. Mar 10, 2009 all the substitution books i have seen have been highly unreliable. Calculating the operating dc or quiescent point of a common emitter amplifier if we have a working circuit. Ac188 datasheet, equivalent, cross reference search. The links at left may help you to research your own replacement transistors. Buy international transistor equivalents guide bernard babani publishing radio and electronics books by michaels, adrian isbn. Bel 188 bel ioon bel ioop pn 2221 pn 2221 a pn 2222 pn 2222a 3904 pn 2906 pn 2906a pn 2907 pn 2907a pn 3906 bf 959 bf 420 bf 422 bf 391 bf 392 bf 393 bf 421 bf 423 vceo volts 15 50 50 50 30 50 40 40 60 40 60 40 300 200 300 300 vcbo volts 300 200 300 300 vebo volts at bias m. If you are seeking a transistor transfer resistor with a high piv peak inverse voltage for use in highvoltage work. Aug 25, 2011 crossreferences are not magic, understanding of the circuit and a parametric search of the important parameters is much more reliable. Tags datasheet, download, electronic software, ic, transistor post navigation. 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.
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