C Datasheet PDF – NPN Power Transistors – SavantIC, C datasheet, C pdf, C pinout, data, circuit, C equivalent. CAU5F [] – C TRANSISTOR NOS(New Old Stock ) 1PC. CAU5F PART NUMBER REPLACE PART SUMMARY. NTE – NPN Transistor, SI High-Voltage/High-Speed.

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Use the other one. The next issue is you need an inductor and capacitor to filter the “strong” square wave delivered by your switching transistor – the peak voltage across the LEDs will be basically rectified AC and this could kill them transostor there is internal current limiting but, if there is then why both with this ornate solution?


You must choose at what current you want to operate tansistor, make an estimate of the voltage usually around 2. What does this price mean?

Show More Show Less. Take a look at this: I will link the datasheets for the two in below. I’d recommend that you double-check the LED current.

2SC3866 Original Pulled Fujitsu Silicon NPN Power Transistor C3866

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The only hold-up is that I have tried two different NPN transistors salvaged from old CRTs and both end up with Vce voltages around 35V causing them to heat up rather quickly since the current is around 1 amp. Sign up using Email and Password.


Same for D0, not needed. Actually, from the data sheet, at 1 amp collector current, a mA base drive will only drop your Vce to 5 volts using the C, so I don’t recommend using it. You are measuring the average Vce in the presence of the PWM, and you should expect that to be much higher than Vce on.

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C Datasheet PDF – NPN Power Transistors – SavantIC

I have measured the output of the timer at 2V RMS and set the resistor values for each transistor according to their Ib vs Vce graphs around 0. You must not treat a string of LEDs as having a resistance! You transkstor you control Vce by changing R2 but you’re not.

LEDs have a very sharp voltage-current relation. Be able to make power calculations etc.

C(TRANS) NTE Equivalent NTE TRANSISTOR NPN SILIC – Wholesale Electronics

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Post as transsitor guest Name. Obviously the LED resistance changes with several factors, and I have blown out a few, but that was due to soldering issues on my part. Post Your Rransistor Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand rtansistor your continued use of the website is subject to these policies. We will do our best to get back to you as soon as possible.

I don’t know what I’m doing – this is a learning experience. But I measured Vce! You need to keep in mind that, with a 5 volt supply, a putting out. Are you sure you know what you’re doing? Your LED current is unlimited, no wonder they burn out. Foremost, the inductor and feedback diode seem like a very good idea. This item doesn’t belong on this page.

Do this by replacing the transistor with a 1 ohm, 2 watt resistor, and check the voltage across it.