Need substitution Transistor For C4304

[NIght Eagle]

The Transistor C4304 of My ATX Power Supply has Been Damaged . I am Not finding it in the Market . I Need the Substitution Transistor Number Of this C4304 Which I Can get in the Market Easy .

And Can I Use PC 817 As Substitution of 830 ?

Please Someone Help me .........

 

[Mike_2545]

Found this Transistors - Power - 2SC4304

 

[NIght Eagle]

Found this Transistors - Power - 2SC4304

Thanks Guru !!! I have Understood your Hints . Now Please Give me One More Favour . To Select The Right Substitution of Transistor Which Values Need To Be Accurate .

Please Tell Me Process . I am Waiting For Your Reply ........

- Thanks Again
- Night Eagle

 

[mneary]

You can find exact one that is still being manufactured. Why substitute?

 

[NIght Eagle]

Guru,
I Found Some Tutorial For Choosing The Right Substitution of Transistor . As The Tutorial I Choose Two High Power NPN Transistor . Their Configuration As Below -

C4304 C4908 C4020
Vcbo = 900 V 900 V 900 V
Vceo = 800 V 800 V 800 V
Ic(Max) = 3(Pulse 6) 3(Pulse 6) 3(Pulse 6)
ft = Vce=12V, Ie= -0.3A Vce=12V, Ie= -0.3A Vce=12V, Ie= -0.3A
15typ MHz 6typ MHz 6typ MHz

Everything is OK except "ft" . I have watched other NPN High Power Transistor But all Hell !! None "ft" is Higher Than 7typ . What Can I Do now ? Please Give me a Right Substitution Number .

Waiting For Your Reply .........

 

[mneary]

The Right Substitution Number is 2SC4304.

 

[NIght Eagle]

The Right Substitution Number is 2SC4304.

If You Do not get It in your market , If You don't have any Credit Card , If you don't have any Paypal Account - Then What will you Do ???

 

[Mike_2545]

How did you expect to get one in the first place?

 

[NIght Eagle]

How did you expect to get one in the first place?

Sorry, I don't Understand - What do you Mean ? Will It be- "Whom did you expect .............?" or "Am I expecting me in the First Place ?" or "Why am I not Finding in the Market ?"

Exactly I am Not Clear ........ What are telling about ?

 

[mneary]

Please explain how we are to help you find it. You have chosen to conceal your location from us. My crystal ball is still broken.

It's available in my market.

If you can only buy transistors from the man who sells you groceries, then ask him what substitutes he carries.

 

[NIght Eagle]

OK ! Guys, Let Finish Of this Story . I don't want to talk more about this topic . It is going for Nothing . So, Finish of it Here . And Thanks you Both For your Replies . And Don't Post more under this topic .




- Thanks
- Night Eagle

 

[mbarazeen]

if the ft is the only different you can substitue either one of them as you found on the tutorial. the switching frequency is bellow 7Mhz and it can work fine. make sure power rating and case style are ok to fit.

 

[mneary]

Helping you to find what is available in your market requires knowing where that market is.

There are probably several people here, who could help you, but you refuse to tell anyone where that market is. I probably have a lot of stores in my market who could supply that part or ones like it, but apparently this is not your market.

 

[audioguru]

I think the guy with no credit cards is broke and homeless.