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Triac Blown

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Hello, I hope you can help me out. I am from the UK. I have an automatic Fridge and Freezer,

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Old 05-06-2013, 04:06 AM
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Hello,

I hope you can help me out. I am from the UK.

I have an automatic Fridge and Freezer, whose Main PCB has failed. Fridge works fine, but freezer does not.
By the looks of it, it looks like a blown TRIAC. A Google search for the number did not return any valuable results. Can you please recommend a suitable equivalent or the details of this TRIAC please?

The details of the neighbouring TRIAC are given below:

ST Electronics
Z7S Y515.

Thanks,

Himanshu

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Old 05-06-2013, 04:53 AM
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I doubt anyone will be able to help but you may be lucky.
This is a North American site so I do not have access to tech info on European units.
I do not know what it is like in the UK but in North America manufacturers do not publish board schematics.

You give the number for a "neighbouring TRIAC" so I am assuming you cannot get a number off of the bad triac.

Googling just Z7S should get you some info on the triac you list.

Then you will have to decide how big a gamble it is to assume both triacs are the same.

Sorry I could not be helpful.
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Old 05-06-2013, 05:41 AM
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Look, I have ordered a new Fridge anyway. Just want to repair current one for learning. I think total of triacs are driving the respective relay (Fridge, and Freezer) compressors.

All, I am looking for as a closest Triac, which could do the job.

Thanks




Quote:
Originally Posted by denman View Post
I doubt anyone will be able to help but you may be lucky.
This is a North American site so I do not have access to tech info on European units.
I do not know what it is like in the UK but in North America manufacturers do not publish board schematics.

You give the number for a "neighbouring TRIAC" so I am assuming you cannot get a number off of the bad triac.

Googling just Z7S should get you some info on the triac you list.

Then you will have to decide how big a gamble it is to assume both triacs are the same.

Sorry I could not be helpful.
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Old 05-06-2013, 11:42 AM
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see attachment
Attached Images
File Type: pdf st z7s.pdf (223.8 KB, 4 views)
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Old 05-06-2013, 01:03 PM
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Thank you!

Do you think that anything other than Triac is also damaged?

2. How do I choose the "closest" equivalent, what factors must be considered? For eg in Transistors one looks for Vce, Hfe, current rating, etc.

Thanks

Last edited by yeshu26 : 05-06-2013 at 01:08 PM.
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Old 05-07-2013, 05:24 AM
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I cannot say if something else caused it to blow.
Without a schematic this may be challenging.
You will have to trace the copper tracks to find out what the triac controlled and then check that part to see if it is defective.
G is the gate and A1 and A2 is power.

It of course has to be the same physically.
Then Google using the Z0i07SN number.
Disregard sites that just give you a data sheet and choose site that actually sell electronic parts.
They should give you basic part specs and with luck perhaps a couple alternatives.
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Old 05-07-2013, 12:59 PM
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Ok, I only got the versions Z0i07NN, and Z0i07MN in the ******** UK. So I ordered an each of them. I think the only difference in the Vdrm.

I have never used Triac before, but have played quit a lot with bipolar transistors. For eg if the actual Vce of a transistor is Vce= 300 V then the replacement shall be 300 V or above.

So is Vdrm a big factor in the cases of Triac?

Thanks
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Old 05-07-2013, 01:47 PM
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Now you are stretching me.
I have not messed with component replacement for over 20 years.
I was in laboratory instrumentation and they even went to board replacement instead of troubleshooting down to component level.
In most cases it was cheaper for a customer to replace the board than pay for my time to troubleshoot down to the component unless it was something obvious or a known fault.

I never had to mess with part specs if I could not find a cross reference locally I could always order from the company I worked for. So I have not really looked at component specs since I left college and that was about 40 years ago.

I did find this on the net that looked like a decent explanation.
http://www.google.ca/url?sa=t&rct=j&...XOmEmg&cad=rja
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