The 152 and 157 refer to temperature in degrees Celsius.
I blew mine last year in 112 degree Arizona desert. The recommended temporary repair (by a mobile tech on the phone) was to replace it with a regular 15 amp inline fuse. I did this until I received the Amazon fuses.
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Woody
Cedar Creek Lake, Texas
2019 Laredo 290 SRL
2019 Ram 2500, 4x4, Cummins diesel
Andersen hitch
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