Author Topic: Does voltage matter on glass fuses?  (Read 989 times)

MN_Scoot

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Does voltage matter on glass fuses?
« on: June 14, 2024, 03:14:16 AM »
I need to replace one of the glass fuses in the battery box. It’s rated as 7A32V.

The exact matches are pretty expensive. OR, I could get a huge variety pack with many different amp ratings. The issue is most of those variety packs have various amp ratings, but very high voltage ratings like 250.

Can I buy the variety pack and use the 7amp/250 volt glass fuses or do I need the exact 7amp/32 volt glass fuses?
2007 Kymco Agility 50
Stock other than Dr. Pulley Sliders and derestricted from the dealer.

MN_Scoot

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Re: Does voltage matter on glass fuses?
« Reply #1 on: June 15, 2024, 02:14:47 AM »
Follow-up question…I ended up finding some 32v glass fuses at an auto parts store, but they only had 7 1/2amp fuses.

Is that extra 1/2 amp going to be a problem for the inline fuse in the battery compartment?
2007 Kymco Agility 50
Stock other than Dr. Pulley Sliders and derestricted from the dealer.

Ruffus

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Re: Does voltage matter on glass fuses?
« Reply #2 on: June 15, 2024, 06:01:32 AM »
Welcome here!
Don't take the 230V rated. The 7 1/2 A (if the overall lenght is the same as OEM) will do. This half ampere wil not do any harm on your scoots electric.
Happy and safe scootering, Ruffus

JJJoseph

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Re: Does voltage matter on glass fuses?
« Reply #3 on: June 17, 2024, 12:20:45 AM »
These 2 fuses by the battery protect your wiring in case of a direct short, usually while doing repairs or mods to the electrical system.  They rarely if ever blow in normal use.  I'd even guess that they never fail in normal use!  They're so rare these days that you might have to order online, but they're cheap.  If they're labelled for "automotive use" they're made for 12V systems.

mousejunks

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Re: Does voltage matter on glass fuses?
« Reply #4 on: June 18, 2024, 02:06:20 AM »
The voltage is simply the maximum rating for the fuse. 32V is fine and you will still find 250V fuses in automotive applications such as DC-DC chargers and inverters etc.

It's ok to go a bit higher with current (amp) ratings. Fuses never blow at the exact amps they are rated for, it just varies the time to blow.
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MN_Scoot

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Re: Does voltage matter on glass fuses?
« Reply #5 on: July 20, 2024, 05:36:43 PM »
These 2 fuses by the battery protect your wiring in case of a direct short, usually while doing repairs or mods to the electrical system.  They rarely if ever blow in normal use.  I'd even guess that they never fail in normal use!  They're so rare these days that you might have to order online, but they're cheap.  If they're labelled for "automotive use" they're made for 12V systems.

So mine actually DID fail! I was having intermittent electrical problems, checked those fuses among many other electrical parts in the system and they looked just fine, so I moved on. I had all body panels removed chasing another gremlin. Finally, I decided to look at these fuses again and although they both LOOKED perfectly fine, I did a continuity test on one of those glass fuses and it failed. Popped a new one in and all problems were solved.
2007 Kymco Agility 50
Stock other than Dr. Pulley Sliders and derestricted from the dealer.

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