Choosing a transistor

[The Master]

That makes sense.

So can you get the same component (with the same number) from more than one company then? I thought each company had their own numbering system even if they make components that do the exact same thing

[rmteo]

It varies from manufacturer to manufacturer. The Fairchild one is rated at 1.2A. This one from On Semiconductor is rated at 500mA:
http://www.onsemi.com/pub_link/Collateral/MPSA13-D.PDF

[Luciano]

Hi,

"Tru Semi" is Rapid Electronics which is not a semiconductor maker.
Try the URL www.trusemi.com and you will be linked to Rapid Electronics.

Is the quality OK?
Can Rapid Electronics test the quality of these products?
Does Rapid Electronics know the real makers of these semiconductors?

* * *

Is that a commercial project or just for your personal use?

Best regards,

Luciano

[The Master]

I found something similar when i went to the truopto site. All the datasheets linked to the rapid site.

I was hoping to sell these lights if they work well. The ones im making at the moment are just test versions and will only be for personal use as will the next few versions untill im confident they are working properly

I know rapid cant test the quality of all their products but they do tend to sell good quality components. If anyone complained about anything im sure they would investigate it straight away. I suppose the only real way is to buy a few and test them. Before selling any of these lights i will leave some turned on for a week or 2 constantly. Some doing PWM and some with all 4 colors on full brigthness. Might even leave some running in extreme conditions like hot/cold/wet etc

[Luciano]

Hi,

The only problem I can see is that your LED modules will
have to produce the same light intensity. This is going to be
important when the LED modules are mounted close to each
other and therefore you can compare the intensity of the light.
The quality of the used LEDs and components will make the difference.
Life duration of high efficiency LEDs is an important consideration.

Best regards,

Luciano

[The Master]

I think ill probably keep one of them turned off then and compare it with the ones ive been testing. Rapid say the LEDs im thinking about are very good quality, last a long time and are bright so i guess all i can do is test them to be sure.