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Why are radial fuses square?

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crgarcia:
Maybe this is more of an english question, and I don't really understand what does radial actually mean. I'm asking here becaue I have the feeling it has more to do with some of the internals of the component:

Why is this a radial fuse?


https://ch.farnell.com/bel-fuse/0697a5000-01/fuse-radial-time-delay-5a-250vac/dp/2848627?mckv=_dc|pcrid|586863766079|plid||kword||match||slid||product|2848627|pgrid|131580399982|ptaid|pla-1586519166231|&gross_price=true&CMP=KNC-GCH-GEN-SHOPPING-SMART-Test873-Low_ROAS

Thanks!

Alti:
Hi. Radially in this context comes from the construction of cylindrical electrolytic capacitors which can have leads oriented radially (not in axis but offset, both on same side) or axially (in axis, one per side).

Other components can also have same/similar construction. Most popular fuse designs with leads are actually axial, usually 5x20 with leads. The advantage of radial design is that you do not have to shape the leads to populate the board. You just cut the leads and put into THT holes. With radial design you need lead shaping (which comes at a cost and creates problems of its own).

eti:
Why are triangles round?

TimFox:
With square or disc-shaped capacitors, for example, "radial" means two leads in parallel (as in your picture) and "axial" means two leads diametrically opposed (like an old-fashioned resistor).
The "axial" usage is obvious, and "radial" is a reasonable convention for the other thing.

vu2nan:
The terms 'axial' and 'radial' are used to describe the orientation of the leads of cylindrical components like resistors, capacitors, fuses etc.



The fuse in question is one with radial leads, that has been moulded in an enclosure.

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