2SA1273 DATASHEET PDF

2SA Datasheet PDF Download – Silicon PNP Transistor Epitaxial Planar Type(PCT PROCESS), 2SA data sheet. 2SA datasheet, 2SA circuit, 2SA data sheet: KEC – Silicon PNP Transistor Epitaxial Planar Type(PCT PROCESS),alldatasheet, datasheet. datasheet search, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes and other semiconductors.

Author: Doubar Shaktijora
Country: South Africa
Language: English (Spanish)
Genre: Health and Food
Published (Last): 4 August 2004
Pages: 34
PDF File Size: 8.27 Mb
ePub File Size: 1.17 Mb
ISBN: 347-9-94611-203-4
Downloads: 4871
Price: Free* [*Free Regsitration Required]
Uploader: Mara

I can’t find a relacement or equivilent. Jax edited the first few lines “removed that is”.

Let’s say now B-E is mV. Here is the datasheet URL for this transistor. First, let’s see how much current Q1 needs to sink when on. By using our site, you acknowledge that you have read and understand our Cookie Policy dataaheet, Privacy Policyand our Terms of Service.

2SA1273 PDF – PNP Transistor – KEC

When SW1 is pressed for a little while, Q1 is turned on. That ratasheet high for a minimum guaranteed gain, but I’ll take your numbers datasheeet face value. You haven’t provided a datasheet for the 2SA, so we’ll arbitrarily assume they can be counted on to have a gain of at least Olin Lathrop k 30 Sign up using Facebook. Post as a guest Name. When Q1 is off, Q2 is off, which then does not try to turn on Q1. You can get them from Newark at this link: By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

  CASTLEVANIA THE BELMONT LEGACY PDF

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and dtaasheet policyand that your continued use of the website is subject to these policies.

【2SA1273 KEC】Electronic Components In Stock Suppliers in 2018【Price】【Datasheet PDF】USA

Note how the suggested by OP resistor values aren’t that well chosen. Thanks for the feed back. I’m not a fan of the 5. Try to find one and pull it 2aa1273 of the circuit and check the pin lay out and measure it’s B to C and B to E. Sunday, 30 May Let’s therefore work backwards requiring Q1 to sink 2.

Picked up a dozen just in case from a guy on ebay. R8 is only to turn off Q4 when it is not being actively driven on.

I thank you for having responded to my question. The main job of Q1 is to turn on Q4, so it can power the load.

【2SA KEC】Electronic Components In Stock Suppliers in 【Price】【цена】【Datasheet PDF】USA

With R4 of 5. Soldered it in and voila, works perfectly. Suppose I wanted to feed this circuit from a battery then I want the currents to be as low as possible, for that I would completely re-calculate all resistor values to get the optimum values.

I would therefore use 3. That’s the main current that Q1 needs to be able to sink when on.

  LON MILO DUQUETTE ENOCHIAN VISION MAGICK PDF

2SA Datasheet(PDF) – KEC(Korea Electronics)

What is the difference between the circuits? Instead of just poking at random values and asking what difference they make, stop and actually think about the circuit.

Q1 and Q2 are arranged with positive feedback so that they have two stable operating points. Sign up using Email and Password. Something in the 2. Hey all, I’ve been trying to figure out why one of my Rovio’s motors only spins dagasheet way. For Q4 I think it depends on the load, how much current the load needs. Looking for Germanium Transistor for Rovio. That shorts the base of Q1 to ground, turning it off. This can work for different values of the resistors R2, R3, R7, R8.

That pulls the top end of R4 which, which turns on Q1.

Home Questions Tags Users Unanswered. Q2, Q4 is 2SA I’d round down to the next common value of 2. But then you’re near the edge of what this PNP can do. Figure another mV for Q4 when saturated, leaving 2.

I’ve read that for the most part silicon tranistors are drop in replacements. Added You now say that you want to support a final load current of mA, and that the gain of Q4 is