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If there is no explicit working temperature printed on the body of the capacitor can we assume is always 85°C?

I have to replace a few of 1980s capacitors (manufactured by ROE, Frako, and Philips), and can't find any technical datasheets about them to decode the marking codes they use.

ROE L2 EKM Capacitor 1000/16

*Added another example of suspect 105°C capacitor: FRAKO 47/40 L3

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    \$\begingroup\$ It wouldn't hurt to replace them with 105 or 125 °C rated caps anyway. \$\endgroup\$
    – Hearth
    Commented May 29, 2022 at 13:41
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    \$\begingroup\$ Tip: When you are specifying degrees (°) you need to specify the units. i.e. °C or °F. I fixed your question. \$\endgroup\$
    – Transistor
    Commented May 29, 2022 at 13:45
  • \$\begingroup\$ @Transistor Thx \$\endgroup\$
    – Coriolanus
    Commented May 29, 2022 at 13:53
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    \$\begingroup\$ @Transistor does any capacitor manufacturer anywhere in the world (even in the USA) use °F to spec their capacitors? \$\endgroup\$
    – brhans
    Commented May 29, 2022 at 14:08
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    \$\begingroup\$ Also, what would be the point of a 105°F rated cap? That would probably require active cooling. \$\endgroup\$
    – MSalters
    Commented May 30, 2022 at 11:08

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If there is no explicit working temperature printed on the body of the capacitor can we assume is always 85°C?

Roederstein EKM capacitors are 105°C rated as per this Vishay-Roederstein capacitor replacement table: -

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  • \$\begingroup\$ Thank you very much for this document. This confirm my suspect about this capacitor. I already noticed Vishay is still currently using the ROE old marking for at least some its radio suppression capacitors and I was optimistic about finding something for the electrolytic ones, but for Frako e Philips maybe is harder. \$\endgroup\$
    – Coriolanus
    Commented May 29, 2022 at 14:04
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    \$\begingroup\$ @Coriolanus I'm sure they'll be out there - it took me 10 minutes to find the Roederstein one and old Philips parts are usually found under EPCOS and more recently TDK I believe. \$\endgroup\$
    – Andy aka
    Commented May 29, 2022 at 14:08

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