Initially in metal to18 packages, the range expanded over time to include other package types, higher voltage ratings, and a better selection of gain h fe and h fe groupings, as well as. Texas instruments transistor and diode databook 1st ed 1973 datasheets for diodes from 1n251 on and transistors from 2n117 on acrobat 7 pdf 34. I saw it back in 1979 and then it was based on the bc107 transistor. Bc107 bc108 series low power bipolar transistors page 3 200406 v1. Semiconductor devices are coded as b stands for silicon transistor c for audio frequency range 107 simple home experiment use first character material a. This is one of those ageold circuits that most people will remember seeing in books and magazines and remember making it.
Bc107 bc108 bc109 low power bipolar transistors to18 features. I got some in a local shop when i asked for bc238cs, which were used in the kosmos sets for children. Of course, after 40 plus years of life, most electrolytic capacitors are suspect and the carboncomposition resistors have drifted high and sometimes become very noisy. Transistor 107 has its base electrode biased positively with respect to the base electrode of transistor. Initially in metal to18 packages, the range expanded over time to include other package. Bc107b bc107 curves equivalent transistor bc107 transistor bc107 datasheet transistor bc107 transistor bc107b bc107 applications bc107 connections characteristic curve bc107. The operation and use of transistors is covered by the transistor circuits page. The transistor is still available in market due to its legacy but you will find better modern. Testing with a multimeter use a multimeter or a simple tester battery, resistor and led to check each pair of leads for conduction. A bc107 was an old ordinary little transistor in a metal case. Bc107 transistors datasheet pdf bipolar transistors. Semiconductor transistor, diode, ic cross reference.
Unit vcbo collectorbase voltage open emitter bc107. Bc107, npn, to18, 100ma, 45v, 110, 300mw, audio, low power, bc182 bc547. The bc107, bc108 and bc109 are generalpurpose low power silicon npn bipolar junction transistors found very often in equipment and electronics booksarticles from. In this case, the first letter, b, stands for silicon.
Usually in a 6 pin to18 or to5, they were designed to be closely thermally and parameter matched. Yesterday i bought a 2n3904 transistor that costed only rs. I have used 2n3904 little transistors to replace bc547 in circuits for many years. Theyre not so popular as they once were, but you may find something thats a very near equivalent to the 547. Bc107 bc108 low noise general purpose audio amplifiers description the bc107 and bc108 are silicon planar epitaxial npn transistors in to18 metal case. Sot54 spt, e1 bc337a smallsignal transistors bc368 bc368. Bc147 was an extremely popular npn transistor originally released in the mid 1070s bt philips semiconductor for audio applications. C transistor is used as a audio frequency amplifier the numerals 107 indicate the type npnpnp a. Jan 19, 2014 bc107 bc108 bc109 transistor data sheet 1.
The bc107 is a low signal npn which is known for its low noise operations making it famously used in signal processing circuits and television receivers. Test each pair of leads both ways six tests in total. It is likely to be an excellent substitute for a bc107 in most cases. I also think bc106 doesnt exist, and its probably a bc107, which was a standard small signal transistor back in the seventies.
The bc107 is a small single npn transistor available in to18 metal can package. Transistor codes surface mount, pnp, npn, choosing. Comset, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. The bc107 is a general purpose transistor that will work quite happily up to 100mhz ft. Home components hardware boards books kits futurlec the electronic components and semiconductor superstore. Description collectoremitter voltage collectorbase voltage emitterbase voltage collector current continuous power dissipation 25c derate above 25c power dissipation 25c derate. 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. Bc107 bc108bc109 january 1989 low noise general purpose audio amplifiers the bc107, bc108 and bc109 are silicon planar epitaxial npn transistors in to18 metalcase. Low power bipolar transistors bc107 bc108 series page 240412 v1. They are suitable for use in driver stages, low noise input stages and signal processing circuits of television receivers.
So an ac107 is a germanium transistor and a bc107 is a silicon transistor. Bc107 equivalent transistors datasheet, cross reference, circuit and application notes in pdf format. May 15, 2017 a bc107 was an old ordinary little transistor in a metal case. Bc107 datasheet, equivalent, cross reference search. One of my interests is restoring vintage transistor radios.
Apr 05, 2008 it has been very useful for me because it doesnt provide only the nte replacements. It goes further and it offers exactly what you were talking in this topic, real replacements like the 80s and 90s replacements crossreference books. It has been very useful for me because it doesnt provide only the nte replacements. The bc107, bc108 and bc109 are generalpurpose low power silicon npn bipolar junction. Bc107bc108 series low power bipolar transistors page 2 200406 v1. Micro electronics datasheet for bc1079, bc1679, bc2379,bc3179 pdf.
The baseemitter be junction should behave like a diode and conduct one way only. This data sheet and its contents the information belong to the members of the premier farnell group of companies the group or are licensed to it. These transistors are age old and have been used in low. Transistor and diode data books for design engineers a useful addition to.
The complete specifications would be present in its datasheet. Bc107 bc108 bc109 mechanical data dimensions in mm inches general purpose small signal npn bipolar transistor 5. A bc547 has the same chip but in a modern epoxy case and its allowed thermal power is double the bc107. Bc108 datasheet, equivalent, cross reference search. Bc107 equivalent transistors equivalent transistor bc108 bc108. However the af239s is a uhf device designed for use in tv uhf tuners and has a low gain min hfe 10 compared with the af11x types min hfe 50 and my experience is that it wont work properly if at all in most radio circuits. The designations were used first by mullard, now philips electronics. Most projects will specify a particular transistor, but if necessary you can usually substitute. The bc107 is a general purpose transistor that will work quite happily up. Oct 14, 2009 the second letter c was for a three terminal device i. Last week i bought a transistor bc107 for putting it into use in my common emitter class a audio amplifier.
Aug 27, 2010 post the link my guess is the description is from someone that isnt a native english speaker a remote control is distinguished from a local control the local controls are physically located on the tv and must be operated in close proximity of the tv, i. Bc107 bc107 npn general purpose transistor datasheet buy. Transistor equivalent circuit with diodes for multimeter test. All central 6 stmicroelectronics 5 cdil 4 comset 4 siemens 3 semelab 3 philips 2 microelectronics 1 njsemi 1. Bc109 npn general purpose transistors 1997 sep 03 product specification supersedes. Bc107 bc108bc109 low noise general purpose audio amplifiers description the bc107, bc108 and bc109 are silicon planar epitaxial npn transistors in to18 metal case. I have a small circuit which controls the speed of a dc motor as per the ambient temperature. Bc107 cross reference electronic circuits, tv schematics.
Bc107, bc107 datasheet, bc107 npn general purpose transistor datasheet, buy bc107 transistor. Bc107, bc107 npn general purpose transistor, buy bc107 transistor. The name bc107 has to be decoded as below b silicon transistor. Micro electronics datasheet for bc1079, bc1679, bc2379, bc3179 pdf. They were created by philips and mullard in 1963 and introduced in april 1966. 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. Keywords, bc107, datasheet, pdf, siemens group, npn, sisicon, transistor.
The bc107, bc108 and bc109 are generalpurpose low power silicon npn bipolar junction transistors found very often in equipment and electronics books articles from. Low noise general purpose audio amplifiers, bc107 datasheet, bc107 circuit, bc107 data sheet. These transistors are utilised in audio frequency, and small signal directly coupled preamplifiers. Another point to watch is that equivalent books list the af239s as a replacement for the af11x range. Set a digital multimeter to diode test and an analogue multimeter to a low resistance range. The gain of the amplifier is governed by emitter resistance of bc212 23k and 20 to 100ohms resistance. The second letter c was for a three terminal device i. Tube bc 107 or rohre bc107 id34570, transistor, wires and audio frequency shown. The initial 2n identifies the part as a transistor and the rest of the code identifies the particular transistor. This three transistor radio circuit utilises bc547b silicon transistors. Most projects will specify a particular transistor, but if necessary you can usually substitute an equivalent transistor from the wide range available. But the reliability and failure modes of vintage transistors is interesting, and is the subject of this article.
Bc107 equivalent electronics forum circuits, projects. 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. Bc107 is the thermal compensation as well quisent current stabiliser for out put transistor 2n3055s say around 50ma. Its max vceo is 45v, its max current is only 100ma and its hfe is from 125 to 500 at 2ma. Matching transistor pairs are available with 5% and 10% matching on hfe or hfe. The generalpurpose range of transistors is a good substitute for basic noncritical audio applications, as these transistors are similar and equivalents to each other. Bc, equivalent, stock, pinout, distributor, price, schematic, inventory, databook. The bc549c is an npn transistor belonging to a group of generalpurpose npn semiconductors consisting of bc547, bc548, and bc549. What are the specifications of bc107 or bc108 transistors. As viewed in the topright image, going from left to right, the pinout is as follows. Multicomp bc107 transistor, bipolar, npn, 45v, 100ma, to. They are suitable for use in driver stages, low noise input stages and signal processing circuits of television reveivers.