Hi,
Just ordered a bunch of slow blow fuses to keep as spares for my pins, and when they arrived, instead of the typical
"spring type coil" inside, they have a thin wire with a bunch of dots on it inside.
The markings aren't giving it away, nothing obvious I can read. So I just wanted to ask if fuses like the ones in the pic below are in fact slow blow, and are they suitable to replace regular slow blow fuses in my pins?
Thanks,
Chaos
Go by the markings:
https://pinside.com/pinball/forum/topic/tech-slow-blow-vs-mdl-fuses#post-1417666
There are very few fuses these days that are not made by either Littelfuse or Bussmann and if they aren't branded as such, chances are it was made by one of them anyway and will contain the appropriate markings.
viperrwk
The type of fuse pictured there is time delay. I think it blows faster than "slo blo". Slow blow ones usually have a coil in them. Time delay have the blobs on the filament (whats pictured).
If it had AGC or MDL on it, I wouldn't need to ask about these 
No..these have to be more obscure.
All the markings: PS over E
ATE
UL in a circle
SA in a "C" shape
Then CQ
See why it was confusing to me? 
However, thanks for the link viperrwk. That led me to this link: http://www.flippers.com/fuses.html
Which shows these fuses as ATE made by Ferraz-Shawmut, and calls them time delay. Seems they are similar to Slow Blow. I guess I am ok using them. I hope.
Chaos
Quoted from Chaos:If it had AGC or MDL on it, I wouldn't need to ask about these
No..these have to be more obscure.All the markings: PS over EATEUL in a circleSA in a "C" shapeThen CQ
See why it was confusing to me?
However, thanks for the link viperrwk. That led me to this link: http://www.flippers.com/fuses.htmlWhich shows these fuses as ATE made by Ferraz-Shawmut, and calls them time delay. Seems they are similar to Slow Blow. I guess I am ok using them. I hope.
Chaos
They are safe to use in place of "slo blo" but may go open faster than they should in certain instances.
The solenoid fuse in a WMS sys6 game like FirewPower needs slo blo and not time delay. I was replacing 2.5a time delay fuses once every couple months until i put in an actual slo blow that hasn't popped since.
Thanks guys. Not always easy getting the exact stuff locally here in SA, and ordering from USA usually means I spend $100 when wanting to buy $5 worth of parts.
I have bought some fuses from Action Pinball, but wanted to have some spares as backup.
I guess these will do in a pinch, but will stick with classic Slo Blo where I can.
Chaos
Quoted from Chaos:Thanks guys. Not always easy getting the exact stuff locally here in SA, and ordering from USA usually means I spend $100 when wanting to buy $5 worth of parts.I have bought some fuses from Action Pinball, but wanted to have some spares as backup.I guess these will do in a pinch, but will stick with classic Slo Blo where I can.
Chaos
Try China sellers like on ebay, alibaba..... some how they can ship anywhere in the world cheap.
The phrase "Slo Blo" is copyrighted by Littelfuse. The Littelfuse 313 "slo blo" is actually a simple time delay single element fuse. And AFAIK Littelfuse doesn't make a dual element time delay fuse. Bussmann technically can't sell a "slo-blo" fuse. They sell either a "time delay" (MDL) or "dual element time delay" (MDQ) fuse. Dual element fuses consist of a short circuit strip and a soldered joint spring connection. During overload conditions the soldered joint gets hot enough to melt and the spring shears the junction loose. Under short circuit conditions, the short circuit element operates to open the circuit. All dual-element fuses are considered to be time delay but not all time delay fuses are dual-element. And not everyone makes both types of time delay fuses.
Honestly, if you look at the time/current curves for single element and dual element time delay fuses you will see minor differences and be hard pressed to choose one over the other.
In the case Andrew cited above, I've replaced a 2.5A single element time delay fuse with a 3A single element time delay fuse with no ill effects.
viperrwk
Quoted from viperrwk:In the case Andrew cited above, I've replaced a 2.5A single element time delay fuse with a 3A single element time delay fuse with no ill effects.
viperrwk
I must have my pop bumpers adjusted too perfectly =P
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