Battery charger fuse replacement

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  #1  
Old 06-20-16, 09:49 AM
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Battery charger fuse replacement

I need to replace an internal fuse on an old Motomaster battery charger. The fuse is a solder on glass fuse and the only mark I see on it is SB 658. The only info I can tell about this fuse is it is a "slow blow" fuse and I have no idea of the amperage. The charger is a 6A charger so I am wondering what type and size of fuse I can use to replace it.

Should I solder on a fuse holder or buy a fuse with axial leads and solder it on?
 
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Old 06-20-16, 10:32 AM
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Should I solder on a fuse holder or buy a fuse with axial leads and solder it on?
Probably more effective and less costly to install a new fuseholder. The size of the fuse is pretty much a mystery though. I think I'd use a 5A slow blow fuse.... at least for starters.

This would be the type you have now.... 215 Series-5x20mm Cartridge Fuses from-Littelfuse
 
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Old 06-20-16, 11:29 AM
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Here is a pic of the current fuse:

http://i1210.photobucket.com/albums/cc418/theomen1/Mobile%20Uploads/IMG_20160618_101845_1.jpg
Name:  breaker.jpg
Views: 956
Size:  38.9 KB
 

Last edited by PJmax; 06-20-16 at 08:20 PM. Reason: added pic from link
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Old 06-20-16, 07:18 PM
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I don't think that is the fuse. Looks like a power indicator lamp.
 
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Old 06-20-16, 08:48 PM
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That is an automatic resetting circuit breaker. Not too many in use anymore.

That is in series with one of the battery cables..... correct ?

There are items to replace it but I don't know what amperage to tell you to use. I have bins full of parts like that and I'd try one experimentally. You want a breaker that holds for charging but trips on a short or overload. I'd be tempted to start with a 6A part.

In the link below is one place to get it from.
SHORTSTOP Circuit Breaker 12VDC 6A - $1.25

Let me know where it's installed first or take a picture a little further away.
 
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Old 06-21-16, 04:39 PM
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Here is a pic from farther away.

Name:  charger.jpg
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