[dorkbotpdx-blabber] Why did God invent Solder in Fuses
kashmirgr at gmail.com
Sat Oct 22 03:28:27 EDT 2011
The short answer is cost to the mfg. A soldered in fuse costs the price of
the fuse, plus the minimal cost of pick and place ($0.001/placement) or had
soldering done by a working making 150 units per hour and only being paid
less than $1.00/hr. Having a holder on the PCB add the $0.47 + all of the
Fix it yourself. Measure the component footprint, and look on digikey to
find a holder that will fit, or solder a fuse holder using wires onto the
PCB terminals. It might cost you a few bucks, but inthe long run, you
maintained the circuit in close to the original design (the fuse is there
for a reason, and a regular wire doesn't meet that), and if you have to
replace it again later you can do so much more easily.
On Sat, Oct 22, 2011 at 12:13 AM, Mark Allyn <allyn at well.com> wrote:
> You are right. However my frustrations lie:
> 1. Fuses sometimes blow for no reason. I have seen it happen
> 2. Fusus should be easily replaceable. In the old days, electronic
> equipment had the fuse in a fuse holder that was mounted on the
> rear apron of the chassis.
> 3. The worst of all; a solder down fuse blows for no reason. The
> repair shop wanted to replace the entire unit. I told them
> where to go. I took the unit apart and replaced the solder in
> fuse with a single strand of wire. The unit works fine. I save
> $$$ for the new unit the shop wanted to rip me off for.
> 4. We can go one step further. My glowing raincoats have a device
> the 'blows' if the current gets too high. But they reset
> themselves after cooling off. Perhaps we can use those
> devices instead of solder in fuses instead. If a hobbyist
> fashion designer can come up with that idea, then device
> manufacturers could do the same.
> This is why I think that solder in fuses are a terrible idea.
> Houses have user-resettable circuit breakers in an easily accessible
> electrical service box.
> Mark Allyn
> Portland, Oregon
> On Fri, 21 Oct 2011, Anthony Asterisk wrote:
> agreed, except for the part where your house catches on fire, and you are
>> left homeless
>> and destitute. ok well maybe there is a reason for fuses even if they do
>> On Fri, Oct 21, 2011 at 10:09 PM, Mark Allyn <allyn at well.com> wrote:
>> This may sound like a rant, but I have to get this off my chest :)
>> Why in heck did God invent these stupid solder down fuses?
>> I recently had a device quit on me. There was no external fuse, but
>> was a solder down fuse on the circuit board buried inside the device.
>> Perhaps it may be my own solder-welding-glueing fume induced
>> but I think it's one of the stupidest concepts concieved on this side
>> of the Milky Way galexy to have solder down fuses in a device.
>> I have been braught up to believe that a fuse is meant to be an
>> replaceable component that save the rest of the device from failure.
>> A solder down fuse would force a non technical geek person to take
>> the device back to the store only to be told to replace the whole
>> device, or at least the board with the fuse on it.
>> Folks, please enlighten me.
>> Luv & Peace
>> Mark Allyn
>> Portland, Oregon
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