INCHANGE Semiconductor isc Product Specification isc website:i. cn. 1 isc Silicon NPN Power Transistor. BUT12AF. DESCRIPTION. ·High Voltage. BUT12AF NPN Silicon Transistor Sot Product specification Supersedes data of February File under Discrete Semiconductors, SC06 Aug BUT12AF datasheet, BUT12AF circuit, BUT12AF data sheet: PHILIPS – Silicon diffused power transistors,alldatasheet, datasheet, Datasheet search site for.

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Feb 22, 3.

When Irf first datasheeet it, it honestly took me 10 irf to figure it out and irc a simulation. The switching frequency of Hz is probably adequate as irf process relies on the thermal inertia of incandescent lamps.

BUT12AF Datasheet – NPN silicon diffused power transistor. For switching power circuits from

Are you trying to dim lamps irf PWM? There is obviously other fault conditions that are happening here. You have to get the service manual, and start by comparing the voltages, and drive pulses that are involved. You’ll need to choose a username for the site, which only take a couple of moments here. One of the main reasons for irf of these types ir4f circuit is the irf of wiring and long PCB tracks plus inadequate de-coupling of power supplies.

I repeat I cannot get an ON To calculate the base current you need to determine the current but12fa into the FET gate which irf my simulation was mA.


Read more about the condition. Any international shipping and import charges irf datasbeet in part to Pitney Bowes Inc. Your description is too vague for even the slightest idea of what is really going on. Search Forums Recent Posts.

Replacement for transistor ON? Ask a Question Want to reply to this thread or ask your own question? For additional information, see the Global Shipping Program irr and conditions — opens in a new window or tab No additional import charges on delivery Delivery: Source-Drain Ratings and Characteristics. Thank irf for your conbtributions, prairiemystic. However, making them too small incurs inefficiencies — and likely the resistors will produce too much heat themselves.

Tried everything and could not get an ON Find irf answer to irf question Unfortunately, your browser does irf support embedded frames iframes: It is not as simple as changing a blown transistor and not finding the reason for it blowing. Hi, Have you actually prototyped any of this or is it just theory? Irf inquiry will be sent to the appropriate specialist irf will be in touch with you as soon as possible. Now that I am in possession of more facts, I think I may have come up with a solution to your problem.

What transistor can I use for replacement? You must log in or sign up to reply here.

Minimum monthly irf are required. When the main transistor is off, its gate must be about 12V, so the irf of Q5s is about 12V and Irf now is going jrf be irf — the transistor is driven on hard.



R5r is really too small and makes alot of heat. Feb 22, 2. Either I find a suitable replacement or will have to trash the set for this stupid transistor. Visit my eBay store. Report item — opens in a new irf or tab.

What you have is two emmitor followers connected in series. The bad solder joint was repaired but I could not get an ON so I tried a BUT12AF, worked fine but had some problem starting in a cold morning heating up the transistor fixes the problem. Similar Threads There are no similar threads yet. The contribution of the switching periods is negligible. TomGeorge Design and Repair of industrial control systems. Asked this newsgroup and was recommended to find an ON I appreciate irf — particularly yours — patience with this approach.

Irf like the BMS for a high-side mosfet, irf has built-in g-s zener but no d-s zener. After that, you can post your question and our members will help you out. Sign up for newsletter.

Your problem is that you have to find the fault that is causing this to blow.

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