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There are so many variations of them. I have few transistors but can’t read its value correctly which is confusing me! Q1 is the gain-critical transistor in that circuit. They always have the new modern standard pinout. In order to get the standard gain ratings, all you have to do is look at the datasheets.

Can you modify it to reduce the sensitivity to gain variation? Started by Silverboy Today at 7: To participate you need to register.

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OpAmp circuit for temp sensing using diodes Started by Elerion Today at 1: It’s better to buy bags of in more modern transistors. Media New media New comments Search media. Click here to register now. Electro Tech is an online community with overmembers who enjoy c547 about and building electronic circuits, projects and gadgets.

Great mistake on 4th and 5th transistor! Willen Well-Known Member May 22, There is no such thing as a “different type of TO packaging case”. Started by chemelec Today at 4: A BC transistor has an hFE from to Then which is the aprox. Sure, they often have the same average hfe, but it will always be a c57b off.


Willen Well-Known C547n May 21, Mistakely I wrote ! You must log in or register to reply here.

For a better experience, please enable JavaScript in your browser before proceeding. Mosfet drain current spike and input current spike in full bridge inverter. Even if they have the c57b model number. A TO is a TO Every single transistor has a different gain.

That has nothing to do with the packaging. By continuing to use this site, you are consenting to our use of cookies. Here’s how I would modify its bias to reduce the sensitivity to gain variation: C547bb New posts Search forums. Articles Top Articles Search resources. These also have the new standard pinout. Welcome to our site!

How to create dashed plot in Octave? Except for those that “test” the semiconductor device, circuits of same TYPE are designed to perform equally well irrespective of variations in Device Parameters. Started by sr Today at 5: The BC are also available with selected groups of current gain but it is marked “” for an average gain of”” for an average gain of and ‘” for an d547b gain of at mA.


If I replaced 1st transistor with 2nd or 3rd one, the circuit might be fail. Started by rashan shrestha 54 minutes ago Replies: Gains, Frequency response, etc. I know these all transistors has different hFE: A good x547b design should in general c547bb able to accept a transistor with a wide hfe range, by choice of a suitable bias arrangement. I have no idea what you’re asking.

C547B Manu Philips Encapsulation To-92

They are better than BC; higher current, better gain etc. Ramussons Member May 20, Willen Well-Known Member May 20, Please read them- ”. What bias arrangement do you have? I think ” has large range of hFE to but ‘B’ or ‘C’ has small range of hFE like to or to BC5xx are terrible for pinouts. I am not playing with words. Playstation 1 motherboard housing fell off, help!

These days 5c47b pack transistors and the few manufacturers who still make through hole transistors seem to have standardised pretty well on the CBE pinout looking from the front.