IBM 3101-12 ASCII terminal - need fuse holder

Tothwolf tothwolf at
Fri Jan 29 14:59:27 CST 2016

On Fri, 29 Jan 2016, Ethan Dicks wrote:
> On Fri, Jan 29, 2016 at 2:39 AM, Tothwolf <tothwolf at> wrote:
>> On Thu, 28 Jan 2016, Ethan Dicks wrote:
>>> I was just gifted with an IBM 3101-12 ASCII terminal that happens to 
>>> be missing the fuse and fuse holder.  Unlike a lot of 1960s and 1970s 
>>> gear, it's not round.  It's square...
>> There aren't too many US made square panel mount fuse holders.
> Indeed.  I've seen them, but they aren't ordinary.

There was another square faced panel mount fuse holder that used to be 
pretty common but I can't remember who made it. I want to say it was 
Mountain Switch but I don't think it was them. Unlike the Littelfuse 348 
series, it has a round, threaded body with a small hole in the outer edge 
of the square frame where you push a small screwdriver to release the 
cap's locking tab.

>> It sounds like it might be a Littelfuse 348 series.
> That looks like the thing.  Thanks!

I couldn't tell from the grainy b/w photo I found online of the rear of 
the terminal if it had a black or red fuse holder cap. They also made them 
in a few other colors, but black and red were the most common.

One thing that will differ on the current production 348 series fuse 
holder caps vs the vintage ones is they no longer have white paint for the 
inset lettering (another victim of RoHS). You can simulate the original 
effect with a white-out pen and just scratch off any excess outside the 
recessed lettering with a fingernail.

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