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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WhatRoughBeast 49k 2 28 Are you sure you know what you’re doing? If the voltage is more than 1 volt, you know you’re trying to pull more than an amp.

2SC3866-2SC 3866-C3866 TRANSISTOR-N 900V 3A 40W

I will link the datasheets for the two in below. This item doesn’t belong on this page. 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. Let us fix the problem for you. This is the price excluding shipping and handling fees a seller has provided at which the same item, or one that is nearly identical to it, is being offered for sale or has been offered for sale in the recent past.

Best Selling in Transistors See all. Please educate yourself first before proceeding. But do take power dissipation into account. This means that, for a load current of 1 amp, you’ll need about mA of base current, which should be well within the capabilities of a I have considered and addressed your comment in the one above.

Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. However, since you seem to be having heat problems, I’ll assume that your transistor is not being properly driven.


The design powers them almost directly from the mains, but limits current using a and beefier NPN.

Very bad indeed, those poor innocent LEDs burnt to crisps: If you don’t know what I’m talking about, then look it up and study it. Same for D0, not needed. You think you control Vce by changing R2 but you’re not. Below is a simplified schematic. Be able to make power calculations etc. You can’t bring Vce down – you are operating it with pulse width modulation therefore the transistor is either fully-on of fully-off.

I have been working on a high-powered LED light bar. The only way you can make this design usable is to add resistors in series with the LEDs. Ok, first of all thank you for your feedback. The rule of thumb is that, when a transistor is in saturation, it has a gain of about 10 to You just cannot hope for the best that things won’t drift.

Parts labeled as “pulls” or “pulled” have been previously installed and are made by the original manufacturer. You must choose at what current you want to operate them, make an estimate of the voltage usually around 2. Be the first to write a review. Trey Carpenter 6 2.

NTE – NPN Transistor, SI High-Voltage/High-Speed

Save on Transistors Trending price is based on prices over last 90 days. Also Volts is dangerous, 1 A through the transistor.

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. We will do our best to get back tramsistor you as soon as possible. Sign up using Email and Password. Maybe the LEDs themselves are better protected internally and this saves the day as you believe but I cannot check this as I don’t have a data sheet or part number I’m not going to follow ebay links btw – if it aint got a data sheet pdf I wouldn’t buy it!


What you need to learn first cannot be explained here in a few lines.

2SC3866 Original Pulled Fujitsu Silicon NPN Power Transistor C3866

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 unless there is internal current limiting but, if there is then why both with this ornate solution? I don’t know what I’m doing – this is a learning experience. And now to the main issue – you are not controlling the current it seems from your circuit diagram – there is c33866 to stabilize the PWM duty cycle – there is no current feedback hence it is open-loop voltage control.

I’ll disagree with Andy about your filtering. You must not treat a string of LEDs as having a resistance! Email 3c866, but never shown. Second, I probably should have indicated that I am used 9x 10W 12V LEDs which I did a few tests on before hand to obtain a general range of internal resistance. I’d recommend that you double-check the LED current.