HJ 13002 PDF

Part Number: HJ Function: NPN Epitaxial Silicon Transistor Maker: Unspecified Pinouts: HJ datasheet. Description: Datasheet. Type Designator: MJE Material of Transistor: Si. Polarity: NPN. Maximum Collector Power Dissipation (Pc): 40 W. Maximum Collector-Base Voltage |Vcb|. HJ Hefei Hejing datasheet pdf data sheet FREE Datasheets (data sheet) search for integrated circuits (ic), semiconductors and other electronic.

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The silicon is normally bonded to the collector, which would match the ECB left to right, flat writing side facing you, pins facing downwards pinout of the CD Basically, you create a circuit that needs the transistor to behave with X amount of gain otherwise the current is too weak to light the LED. Submit a new link.

HJ Datasheet PDF – Vcbo=V, NPN Transistor

If the LED does not light up, then reverse the two legs and if it lights up, you now have one diode. Log in or sign up in seconds. You could test nj yourself you know. Can anybody help me identify the legs of this transistor?

With a DMM, you can test the legs and each pair that has low resistance is a forward biased junction, any pair that has high resistance is a reverse biased junction. You can create your own test equipment for general guidelines if you’re creative.

(PDF) HJ13002 Datasheet download

I don’t have a DMM but I’ll have to look into it. You will, of course, read the same unreadably high ohm resistance between collector-emitter regardless of bias.

Not to worry, I have 2 exactly the same. Thank you my friend, this is very helpful. The alternative is that the P side must be at least more positive than the N side respectively. If you don’t have a DMM, use ohms law to build this https: I just cracked open this one hoping to illuminate which pin is which. Can anybody identify which leg is which from the insides?


Become a Redditor and subscribe to one of thousands of communities. I know the Base is typically in the middle, but i googled the numbers from the face,HJ, B1 and found a datasheet for the HJ Transistor, which said the Base was the leftmost leg. Doing so would actually improve your knowledge and and your soldering skill and get you some really cheap tools, although DMMs these days aren’t very expensive. For instance, a beta gain transistor circuit would light up one LED if the gain is overa different LED if its over but underand so on.

C is probably the tiny pad, B is probably the long rail pad, and E is the large square pad. The base must also be negative with respect to collector and current will flow.

Transistors function in their active region as class A amplifiers thanks to the base-collector being reverse biased while the base-emitter is forward biased. It’s dead, you need a new transistor. Put two of the legs between the LED.

This is an open community for the do-it-yourself pedal builders of reddit! Now amend that circuit so that the negative side of the battery or ground if you want to call it is touching one leg of your transistor, and another leg is touching the LED. This is a transistor diode tester. You should read open circuit or beyond the measurement of your DMM in ohms for reverse biased base-collector or base-emitter.


It lights up if the diode of the transistor is forward biased. If you have a DMM, you should read something like megaohms between a forward biased base-collectopr and a forward biased base-emitter. Info about building and modding: When the voltage rises high enough it would activate the junction and conduct.

Please read this first! Submit a new text post. So I’m attempting my first pedal, and I’m totally new to electronics altogether. Use of this site constitutes acceptance of our User Agreement and Privacy Policy. If the LED still lights up, then the legs are of a diode in ‘proper orientation’.

Welcome to Reddit, the front page of the internet. I made it simpler from the rambling. Then test the other two legs. Im going to assume the emitter is the large pad, so the base is going to be one of the others, and the collector is obviously the last. In a PNP, the base is the N, so it must be negative with respect to the emitter and it will be biased and current will flow.

I found this in a light bulb, but can’t tell which leg is which. Sorry if this is a very pedestrian question, I’ve already tried my best on google: FYI this is a high voltage transistor designed for switching operation, very commonly found in compact fluorescent lamps.

In NPN, the opposite is true. But I’m not positive it was the right datasheet. Want to add to the discussion? If you don’t have a DMM, use ohms law to build this.