Re: Operating temperatures

From	KevinJ93 <kevin_es@whitedigs.com>
Newsgroups	sci.electronics.design
Subject	Re: Operating temperatures
Date	2025-10-25 11:23 -0700
Organization	A noiseless patient Spider
Message-ID	<10dj4js$3havg$1@dont-email.me> (permalink)
References	<10dg0ne$2kgnq$1@dont-email.me> <10dg424$2lfoj$1@dont-email.me> <10dgfqo$2pdia$1@dont-email.me> <10dh08n$2e0ho$1@dont-email.me> <10dh51h$2vj73$1@dont-email.me>

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On 10/24/25 5:18 PM, Don Y wrote:
> On 10/24/2025 3:57 PM, John R Walliker wrote:
>>> Auto dealers explaining away errors thrown by on-board SAFETY kit that
>>> gets upset in the heat (should I only drive during winter months)?
>>
>> Design guidelines for automotive electronics assumed a maximum passenger
>> compartment temperature of 70 deg C when I was doing such things a long
>> time ago.
> 
> Car interiors get to that temperature in about an hour when left in
> full sun on a 100+ day.
> 
>    "Researchers from University of California San Diego School of Medicine
>     and Arizona State University found that if a car is parked in the sun
>     on a summer day, the interior temperature can reach 116 degrees F. and
>     the dashboard may exceed 165 degrees F. in approximately one hour - the
>     time it can take for a young child trapped in a car to suffer fatal
>     injuries.
> 
>     "The researchers found that, for vehicles parked in the sun during a
>     simulated shopping trip, the average temperature inside the vehicles
>     hit 116 degrees F., dashboards 157 degrees F., steering wheels 127
>     degrees F. and seats 123 degrees F. in one hour."
> 
> <https://www.disabled-world.com/disability/emergency/advisories/car- 
> temp.php>
> 
> (Of course, darker interiors lead to higher temperatures)
> 
> We all know how UNcommon covered parking is...

Devices for Automotive use are usually qualified for differing ranges 
depending upon the zone where they are situated in the vehicle:  -25 to 
105 deg C for benign zones or up to -40 to +150 deg C in more extreme 
zones such as the engine bay.

Consumer devices such as iPhones, computers etc are commonly rated for 0 
- 40 degC on the basis of being in a human comfortable temperature range.

Even if the outside temperature is outside that range humans usually 
will be somewhere with heating or cooling to maintain a more comfortable 
local climate.

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Operating temperatures Don Y <blockedofcourse@foo.invalid> - 2025-10-24 06:58 -0700
  Re: Operating temperatures Martin Brown <'''newspam'''@nonad.co.uk> - 2025-10-24 15:56 +0100
    Re: Operating temperatures john larkin <jl@glen--canyon.com> - 2025-10-24 08:12 -0700
    Re: Operating temperatures Don Y <blockedofcourse@foo.invalid> - 2025-10-24 11:16 -0700
      Re: Operating temperatures John R Walliker <jrwalliker@gmail.com> - 2025-10-24 23:57 +0100
        Re: Operating temperatures Don Y <blockedofcourse@foo.invalid> - 2025-10-24 17:18 -0700
          Re: Operating temperatures KevinJ93 <kevin_es@whitedigs.com> - 2025-10-25 11:23 -0700
            Re: Operating temperatures Don Y <blockedofcourse@foo.invalid> - 2025-10-25 12:27 -0700
          Re: Operating temperatures john larkin <jl@glen--canyon.com> - 2025-10-25 12:42 -0700
  Re: Operating temperatures Bill Sloman <bill.sloman@ieee.org> - 2025-10-25 04:02 +1100
  Re: Operating temperatures Chris Jones <lugnut808@spam.yahoo.com> - 2025-10-26 21:06 +1100
    Re: Operating temperatures Don Y <blockedofcourse@foo.invalid> - 2025-10-26 03:24 -0700

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