Introduction to bc548 projectiot123 technology information. I am kinda new to this circuit making stuff, and i took a introductory subject to electrical engineering. Dont go for a transistor with a much higher ft as this may increase the risk of oscillation. Can you guys help me find out the transistors that can. Bc548 transistor pinout, equivalent, uses, features. Ideally use a ztx851, however bc337 will work reasonably well and better than 2n2222 or 2n2222a, i. It is nothing but a npn transistor the base current given by applying base emitter vo. Click here specifications bipolar transistor leaded process compatible. Hilitchi 250piece 10 values npn pnp power general purpose. That diode is there to loop back pulse current when the relay is switched off. Apr 01, 2009 my problem is i couldnt find the two transistors, npn bc548 and pnp bc559 at any of my nearby radio shacks. Jun 19, 2017 today, i am going to give an introduction to bc547.
Bc548 transistor replacement datasheet, cross reference, circuit and. If you want more explanation about these concept please watch below video. Bc548, bc548 npn general purpose transistor, buy bc548 transistor. What is the difference between bc547 and 2n2222a transistor. Bc548 cross reference electronic circuits, tv schematics, audio. Choosing transistor replacements electronics notes. 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. After comparing the spec sheets online and doing a little bit of googling, i found that pnp transistor 2n3906s characteristics and specs seem to fit pretty well with bc559 and bc548 fits fairly well with 2n3904s. Mar 16, 2018 bc548 is a npn transistor so the collector and emitter will be left open when the base pin is held at ground and will be closed when a signal is provided to base pin. Absolute maximum ratings ta 25c unless otherwise noted. Bc548 is a npn transistor so the collector and emitter will be left open when the base. So i just wanted to know can the bc148 be used as a general substitute for 2n2222 or is it just the case in this. No licenses or rights to any such third party software toolsproducts are granted to licensee by on semiconductor.
Details can be found at the bc548 transistor datasheet give at the end of this page. 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. Rating collector emitter voltage collector base voltage emitter base voltage collector current continuous total device. 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. Bc558 transistor pinout, equivalent, uses, features. The gain of the bc548a will be in the range from 110 to 220, bc548b ranges from 200 to 450, bc548c ranges from 420 to 800. Bc546 npn transistor complementary pnp, replacement. Here is an image showing the pin diagram of the this transistor. It can also be replaced with some well know transistors. Driver modules like relay driver, led driver, and switching modules. I have ordered a pcb for my circuit which includes transistor bc548 q1, sk100 q2 and a zener diode d2, but when i got the pcb it has no holes for those three components. If its just switching, then its much less important to get an exact equivalent and even something like a bc337 would probably do. Mar 11, 2008 its an npn transistor rated for 500ma, 50v and with a hfe gain between 20 and 300, typically 80 at 0. Join date sep 2008 location bengaluru, india posts 174 helped 21 21 points 2,147 level 10.
Replacement and equivalent transistor for the bc548. A transistor is normally used for amplification of current. I have seen many circuits using the 2n2222 transistor correct me if it isnt one. Buy products related to bc547 transistor products and see what customers say about bc547 transistor products on free delivery possible on eligible purchases. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the collector, base, and emitter leads. The bc548 transistor might have a current gain anywhere between 110 and 800. Bc548 is a npn transistor so the collector and emitter will be left open when the. 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. It is also used as a complement for transistors bc546 to bc550. What is the use of transistor bc548 in water level indicator. Npn complementary of bc558 is bc548 replacement and equivalent. The transistor is a bc548 npn transistor, very cheap and easy to find. Bc548 transistor pinout, equivalent, working as amplifierswitch.
So, the basic purpose of transistor is transfer of resistance. Bc548 transistor as switch transistors, switch, electronics circuit. Bc is a npn transistor so the collector and emitter will be left open reverse biased when the base pin is held at ground and will be bc548b datasheet forward biased when a signal is provided to base pin. Bc548, bc548 datasheet, bc548 npn general purpose transistor datasheet, buy bc548 transistor.
It is basically an npn bipolar junction transistor bjt. The bc548 transistor is a semiconductor that works to switch electronic signals, and in some cases amplify them. It is used in switching and amplifier applications. Hilitchi 250piece 10 values npn pnp power general purpose transistors assortment kit. Dec 11, 2017 2n2222a 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. A very good components and service by electron components the products i got from electron components are best in quality it is like that it can understand our needs i cannot expect a brushless fan for rs. 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. These transistors are utilised in audio frequency, and small signal directly coupled preamplifiers. I have use bc547 for a project water level indicator.
It can handle a collectorload current of 100 ma, and the hfe gain is 110. The bc548 is a generalpurpose npn bipolar junction transistor commonly used in european and american electronic equipment. Bc548 npn transistor complementary pnp, replacement. Then i searched for smd type equivalent of those, but their pins are too distant as compared to my pcb. Semiconductor transistor, diode, ic cross reference. So now, should i drill the holes or should i use smd equivalent. Substitute to bc148 transistor electronics forum circuits. Bc548b npn general purpose transistor pack 10 bc548b low power, small signal, general purpose npn transistor. Bc548 is a npn transistor so the collector and emitter will be left open when the base pin is held at ground and will be closed when a signal is provided to base pin.
Alternative transistors for bc558 are bc559, 2n3906, bc338, 2n4403, a1015, bc557 the pin configuration of the alternative transistors shown here may different from bc558, therefore it is recommended to always check the pin configuration before replacing in a circuit. The bc549c is an npn transistor belonging to a group of generalpurpose npn semiconductors consisting of bc547, bc548, and bc549. Feb, 2018 thanks for a2a the bc548 transistor is used in water level indicator as a sensor. Bc548 bc548a bc548b bc548c npn general purpose amplifier bc548 bc548a bc548b bc548c this device is designed for use as general purpose amplifiers and switches requiring collector currents to 300 ma. Biasing a transistor to operate as an ideal switch involves understanding transistor characteristics graphs. The word transistor is a combination of two words, transfer and resistor. Problem is, i cant find a bc148 transistor and im looking for a substitute. The pinout of the bc548 transistor is as shown in the following figure. Hilitchi 250piece 10 values npn pnp power general purpose transistors assortment kit bc327bc558. Select a replacement transistor with equivalent ft. Bc548 datasheet, equivalent, cross reference search.
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. The bc558 pnp transistor is a general purpose pnp transistor. Licensee shall ensure that it has obtained all necessary licenses and rights to use any such third party software toolsproducts which are necessary in order to utilize the content. This article focuses exclusively on biasing and if you have gaps in your knowledge, then i recommend reading the earlier pages of this multipage article. Transistors are one of the most important circuit board components, and replaced vacuum tubes in the mid20th century, allowing for the true miniaturization of electronics. Bc548 is commonly used npn transistor same like bc547. Rating collector emitter voltage collector base voltage emitter base voltage collector current continuous total device dissipation 25c derate above 25c total device dissipation 25c derate above 25c operating and storage junction. Bc 548 is a commonly used transistor that can be found easily. Bc548 transistor pinout, equivalent, working as amplifier. I decided to use ksp2222a to replace the bc548, and mpsh10 for the bf494. Substitute for 2n2222 electronics forum circuits, projects.
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