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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It’s dead, you need a new transistor. 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. When the voltage rises high enough it would activate the junction and conduct.
Plastic Box Injection Mould (HJ13002)
So I’m attempting my first pedal, and I’m totally new to electronics altogether. I just cracked open this one hoping to illuminate which pin is which. You could test this yourself you know. Log in or sign up in seconds.
It lights up if the diode of the transistor is forward biased. 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. If the LED does not light up, then reverse the two legs and if it lights up, you now have one diode. The alternative is that the P side must be at least more positive than uj N side respectively. 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.
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. Info about building and modding: You should read open circuit or beyond the measurement hk your DMM in ohms for reverse biased base-collector or base-emitter.
Can anybody help me identify the legs of this transistor? : diypedals
FYI this is a high voltage transistor designed for switching operation, very commonly found in compact fluorescent lamps. You will, of course, read the same unreadably high ohm resistance between collector-emitter regardless of bias.
This is an open community for the do-it-yourself pedal builders of reddit! If the LED still lights up, then the legs are of a diode in ‘proper orientation’.
MJE13002 Datasheet, Equivalent, Cross Reference Search
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 Welcome to Reddit, the front page of the internet.
Can anybody help me identify the legs of this transistor?
Can anybody identify which leg is which from the insides? Then test the other two legs.
But I’m not positive it was the right datasheet. Looking for troubleshooting help?
This is a transistor diode tester. Please read this first! I made it simpler from the rambling. Not to worry, I have 2 exactly the same. With a DMM, you can test the legs and each pair that has low resistance is a forward biased junction, nj pair that has high resistance is a reverse biased junction.
HJ Datasheet Hefei Hejing pdf data sheet FREE from
I found this in a light bulb, but can’t tell which leg is which. In NPN, the opposite is true. Become a Redditor and subscribe to one 113002 thousands of communities.
Submit a new link. C is probably the tiny pad, B is probably the long rail pad, and E is the large square pad.
I don’t have a DMM but I’ll have to look into it. 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. If you don’t have a DMM, use ohms law to 13002 this https: