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Unknown type of polyswitch

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MisterLonewold

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MisterLonewold

Joined Jun 5, 2025
20
wraujr said:
P is logo for Polytronics and its their 30V series. The 135U is most likely the 1.35A hold with IH33 as a date code.

RLD30P135UF would be the complete part number.

View attachment 350801

and now owned/produced by Littelfuse (note that the 'F' has been dropped from the part #, just 135U
www.littelfuse.com/assetdocs/rld30-lf-040706?assetguid=ac53218e-b6c8-4cde-af79-ba8aed197896
Obsolete and replaced by Littelfuse RUEF135-AP at DigiKey.
Click to expand...
I can't believe you found it, thank you so much! Though i can kinda assume the fuse of the mx900 is not very good then i guess. Since it measures 16.6Ohm compared to that table while the one of the mx700 measured 0.18Ohm in the same way of measuring. I think only the date code was different so it sould be the same resistances i think?
 
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