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Chronos 2 timer MTBF

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#1 mvapola


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Posted 07 December 2010 - 05:45 AM

I'd need to know the MTBF value for the Chronos 2 timer MUR3 (P/N: 88826103), either calculated (MIL-HDBK-217) or based on statistical findings. Can you please provide the value.

#2 Jesus Miranda

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Posted 10 December 2010 - 12:59 PM


MTBF = 733,116 hrs = 83.6 years.


#3 Mogge


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Posted 12 December 2010 - 04:25 AM

QUOTE(Jesus Miranda @ Dec 10 2010, 08:59 PM)
MTBF = 733,116 hrs = 83.6 years.

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Wow, congratulations.

However, one very important factor is the operating temperature, so i suggest you specify that too.

Electrolytic capacitors are often specified to only 2000 hours at their rated temperature, but lifetime doubles each x degrees lower temperature. Thus temperature is extremely important to specify for all normal electronic lifetime specifications.

Or, theese do not contain electrolytic capacitors?

(Of course also other components are sensitive to temperature, but electrolytic capacitors are generally the most sensitive.)

I often repair industrial control gears, and some fail after just twenty years or so, and the fault is most often dried electrolytics. (other faults are relay wear, oxidised pressed connectors and screw joints, badly cooled semiconductors, and EEPROMS loosing content, but often secondary faults due to external wiring or machine faults.)

/the teacher wink.gif

#4 mvapola


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Posted 14 December 2010 - 07:24 AM

Hi, please note that lifetime and MTBF are two different things. Anyway, thanks for the answer and the comments on the lifetime as well!!!

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