I echo Bev and the other's; there is no "normal" or one-size-fits-all reliability test.
The test parameters have to be selected to accelerate the life expectancy under conditions that are beyond the worst-case situations the product may see.
Besides those mentioned, there are a number of other tests within a given reliability test for any given product.
Some examples; Torpedo guidance systems must be able to withstand not only extreme thermal ranges, but also while under extreme shock and vibration and pressure.  For the clients I work for who drill for oil in the North Atlantic and Baltic, their environmental testing on downhole product has to cycle from -50C to +150C but also under extreme vibration. But that type of testing would be waaaaay more than many other electronic products would need.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian
Sent: Thursday, June 23, 2016 1:23 PM
To: [log in to unmask]
Subject: Re: [TN] Thermal Cycle Testing

John,

As others are stating there is no one "normal". Nortel (still waiting to see if I get any of my pension), did 0 to 100C, 3000 cycles for long life product.
Regards,
Bev 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of John Burke
Sent: Thursday, June 23, 2016 12:13 PM
To: [log in to unmask]
Subject: [TN] Thermal Cycle Testing

Good morning !!

 

A question came up on reliability testing.

 

Typically PCBA's are thermally cycled as a part of reliability testing usually for 1000 cycles.

 

What is the group's experience for non-military thermal cycling ranges?.

 

I am often asked to use 0 - 100c sometimes -40 to 85c and sometimes various other thermal cycles picked from the JEDEC standard.

 

What is the groups experience for this?. I am trying to establish "normal"
practice.

 

Best regards,

 

John



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