How transistors work is probably the hardest concept for you to understand as a beginner. Bc107 bc108 bc109 mechanical data dimensions in mm inches general purpose small signal npn bipolar transistor 5. General purpose small signal npn bipolar transistor features silicon npn hermetically sealed to18 screening options available vcbo collector base continuous voltage bc017 bc108, bc109 vceo collector emitter continuous voltage with zero base current bc107 bc108, bc109. 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. Theyre critical as a control source in just about every modern circuit. These transistors are utilised in audio frequency, and small signal directly coupled preamplifiers.
Texas instruments transistor and diode databook 1st ed 1973 datasheets for diodes from 1n251 on and transistors from 2n117 on acrobat 7 pdf 34. They are suitable for use in driver stages, low noise input stages and signal processing circuits of television receivers. Transistor and diode data books for design engineers a useful addition to your technical library. Inside you will find reference to all of the above types of transistor, together with their equivalents all you need to know is the transistor by its manufacturers reference such as bc109 a lownoise lowpower npn device. A bc108 transistor is an npn negativepositivenegative bipolar transistor. What you wont find is the meaning of the manufacturers code so here it is.
Transistor codes surface mount, pnp, npn, choosing. The initial 2n identifies the part as a transistor and the rest of the code identifies the particular transistor. The generalpurpose range of transistors is a good substitute for basic noncritical audio applications, as these transistors are similar and. Bc109 series low power bipolar transistors page 2 080406 v1. Book depository books with free delivery worldwide. It is no good knowing you could substitute a bc109 for a bc 108 if you cant get either. Bc109 npn general purpose transistors 1997 sep 03 product specification supersedes. The next most important parameter is possible ft the effective maximum operating frequency although the transistor is of no use at that frequency. But you could look in a catalogue for a silicon npn transistor with a voltage rating greater than 25 volts and a current capacity greater than 100 milliamps and a gain greater than 100 and the pinout sequence ebc and perhaps ft greater than 100mhz. Collector emitter continuous voltage with zero base current bc107. The problem is that almost everyone is trying to teach that a transistor is a semiconductor device.
Is there a big difference between a bc108 and a bc109 fuzz. Bc109 series low power bipolar transistors page 3 080406 v1. Home t transistors bc series bc109 bc109b npn general purpose transistor. Unit vcbo collectorbase voltage open emitter bc107. Transistor equivalent circuit with diodes for multimeter test.
This is a pdf format of the well known hardware pinout book, which covers various computer, electrical and electronic item pinouts. Bc109 npn transistor complementary pnp, replacement. Bc107 bc108 bc109 low noise general purpose audio amplifiers description the bc107, bc108 and bc109 are silicon planar epitaxial npn transistors in to18 metal case. Home components hardware boards books kits futurlec the electronic components and semiconductor superstore. The bc548 and bc549 are almost identical npn transistors. The operation and use of transistors is covered by the transistor circuits page. Buy international transistor equivalents guide bernard babani publishing radio and electronics books by michaels, adrian isbn. The complementary pnptransistor to the bc109 is the bc179. Bc109 bc109 npn general purpose transistor datasheet buy. The bc109 transistor might have a current gain anywhere between 200and 800.
Get the best deals on bc109 transistor when you shop the largest online. Bc109, bc109 datasheet, bc109 npn general purpose transistor datasheet, buy bc109 transistor. I dont know if they were attempting to get in the same ballpark, i found the foxrox a bit more restrained and the hendrix a. Vrt comparison table for semiconductors from a to z. Ap npn small signal transistor sk3854 bc 109 equivalent. Bc109 datasheet, equivalent, cross reference search. Bc109c datasheet, equivalent, cross reference search. International transistor equivalents guide bernard babani.
Bc107 datasheet, equivalent, cross reference search. Irf520p to220 nchannel power mosfet rf final and en369dr companion part. Everyday low prices and free delivery on eligible orders. One part that you should add to the circuit is a 1n400x series 1n40011n4007 rectifier across the relay coil. I recently had within a few weeks of each other both a dunlop hendrix fuzz face mini, with bc108cs and a foxrox hot silicon with bc109s. Second book of transistor equivalents bernards and babani press radio books.
Bc107 equivalent transistors equivalent transistor bc108 bc108 equivalent bc177 equivalent bc107 equivalent bc178. Problem is, i cant find a bc148 transistor and im looking for a substitute. Bc109, npn, to18, 200ma, 20v, 200, 300mw, audio low noise, low power. 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. Transistor equivalents for the substitution of modern. I just entered transistor without quotes in the search box at the top level, then clicked on transistors bjt single,797 items and it took me to the transistor search page above. Semiconductor transistor, diode, ic cross reference.
Bc109 cross reference electronic circuits, tv schematics. Rs components bc109 transistor buy, price, datasheet. Ill guess you want to use this transistor in a noncritical circuit. They both have an absolute maximum collector rating of 100 ma, and power dissipation of 500 mw. For transistors operating as switches the maximum collector current i c max.
And instead of just telling you what it does, they explain that it consists of ndoped and pdoped materials. Transistor specifications explained electronics notes. Codes beginning with b or a, for example bc108, bc478 the first letter b is for silicon, a is for germanium rarely used now. The rest of the code identifies the particular transistor. The bc549c is an npn transistor belonging to a group of generalpurpose npn semiconductors consisting of bc547, bc548, and bc549. 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. Micro electronics datasheet for bc1079, bc1679, bc2379, bc3179 pdf. Original transistor type original alternative type modern substitute alternative substitute. Bc107 bc108bc109 low noise general purpose audio amplifiers description the bc107, bc108 and bc109 are silicon planar epitaxial npn transistors in to18 metal case. Suitable for applications requiring low noise and good hfe linearity, eg. Buy bc109 silicon npn transistor rs293549 by rs components.
Both transistors have a maximum collectoremitter rating of 30 v, and collectorbase rating of 30 v. In this tutorial well introduce you to the basics of the most common transistor around. The gain of the bc109bwill be in the range from 200to 450, bc109cranges from 420to 800. Bc107 was aimed at switching, bc109 was aimed at low noise amplification, and the distinction lives on in the bc54x series and their bc84x surface mount replacements 2n series probably contains a satisfactory equivalent but im not so familiar with american transistor series. The bc107, bc108 and bc109 are generalpurpose low power silicon npn bipolar junction transistors found very often in equipment and electronics books articles from europe, australia and many other countries from the 1960s. Without it, induced voltages from the coil when the transistor turns off will eventually destroy the transistor. Initially in metal to18 packages, the range expanded over time to. Most projects will specify a particular transistor, but if necessary you can usually substitute an equivalent transistor from the wide range available. The transistor should present a high resistance between the collector and emitter with the base left open circuit as there are two back to back diodes. Bc109, bc109 npn general purpose transistor, buy bc109 transistor. That is good practice when controlling a dc relay with any semiconductor.
Free transistor circuits books download ebooks online. It goes further and it offers exactly what you were talking in this topic, real replacements like the 80s and 90s replacements crossreference books. Likewise, if the original was a bc147, then check the circuit carefully to see what voltage the transistor might be subjected to, and replace with a bc107 or bc547 if in doubt. Bc107 bc108 bc109 low power bipolar transistors page 1 300505 v1. So, if the original transistor was a bc149, its best to use a bc109 or bc549 as a replacement although in practice, the difference in noise might be negligible. They were created by philips and mullard in 1963 and introduced in april 1966. Matching transistor pairs are available with 5% and 10% matching on hfe or hfe. There are many different transistor specifications defining aspects of a. The smd version of the bc109 is available as the mmbth10sot23. It has been very useful for me because it doesnt provide only the nte replacements.
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