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.

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OK I found it.

2SA NTE Equivalent NTE12 TRANSISTOR PNP SILICON – Wholesale Electronics

This can work for different values of the resistors R2, R3, R7, R8. The circuit basically consists of 3 sections: 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.

By Ohm’s law, the maximum R7 value is therefore 3. Thanks for the feed back. Content is read only for historical purposes.

Looking for Germanium Transistor for Rovio

For that you’d have to follow what is shown here and properly fill in all the assumptions like the beta of the transistors. The LED D1 is used as an example of a load. That means a total of at least 1. That shorts the base of Q1 to ground, turning it off.


When Q1 is off, Q2 is off, which then does not try to turn on Q1. What is the difference between the circuits? Also from what I’ve read, Ge transistors are prone to eairly demise. This pulls the bottom end of R2 low, which turns on Q2.

2SA Datasheet PDF –

Once you understand what each part does, you’ll be able to find acceptable values for them yourself. Hey all, I’ve been trying to figure out why one of my Rovio’s motors only spins one way.

The purpose of R8 is to make sure Q4 is off when not being explicitly driven. Email Required, but never shown. Suppose I wanted to feed this dahasheet 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. Hope this helps you out. Here is the datasheet URL for this transistor. But then you’re near the edge of what this PNP can do. The base of Q1 needs 2.

For Q4 I think it depends on the load, how much current the load needs. I thank you for having responded to my question. The RoboCommunity Webiste no longer accepts new users.

Post as a guest Name. That large current isn’t datasheer needed. Looking for Germanium Transistor for Rovio. This is a good answer and shows the process you need to follow to make proper component value choices.


That results in Since R3 only needs to react “instantly” on a human time 2sa11273, there is no need to make R3 small. I’m not a fan of the 5. Since you haven’t specified speed, there is no way to say whether 5.

(PDF) 2SA1273 Datasheet download

It’s still difficult for me to understand, but I will learn. The main job of Q1 is to turn on Q4, so it can power the load. Picked up a dozen 2ssa1273 in case from a guy on ebay. Each transistor being on keeps the other on. Now you have to go back and update the min required current sink value for Q1, and ripple thru all the downstream calculations from that as shown above.

Sign up or log in Sign up using Google. 2sa273 read that for the most part silicon tranistors are drop in replacements. Let’s say now B-E is mV. R8 is only to turn off Q4 when it is not being actively driven on. That’s the main current that Q1 needs to be able to sink when on.