What's the point of a 0Ω resistor?

[TechGeek]

Was looking through some schematics and saw a 0Ω resistor. What is the point of having a resistor if it isn't even 1Ω?

[ReeceyBurger123]

Re: What's the point of a 0Ω resistor?

Can burn out if too much current/voltage is applied Ie S/C further downline so can act as a fuse. Vestel do this all the Tv with their Tv boards use 0ohms as fuses. But they can also act as links etc.

[TechGeek]

Re: What's the point of a 0Ω resistor?

Oh Ok

[ChaosLegionnaire]

Re: What's the point of a 0Ω resistor?

they could have just called it a fusible resistor in the schematic? i believe they even have a circuit symbol for fusible resistors?

[stj]

Re: What's the point of a 0Ω resistor?

they are often fitted because you can lift them to isolate parts of a circuit,
or because they need to bridge over some other tracks, and old pick&place machines couldnt auto-insert jumpwires.
but they could insert resistors.

[petehall347]

Re: What's the point of a 0Ω resistor?

they are often fitted because you can lift them to isolate parts of a circuit,
or because they need to bridge over some other tracks, and old pick&place machines couldnt auto-insert jumpwires.
but they could insert resistors.

never though of that ... always made me wonder but never studied it ... i thought them as fuses .. then again i see lots of resistors as fuses .especially if limiting current

[stj]

Re: What's the point of a 0Ω resistor?

if you crush a 0-ohm resistor you will find that atleast 50% of them are actually a continuous copper wire or even a metal sleeve and not a carbon or metal-oxide device at all.

i just murdered one for you.
pic1 - as it was desoldered.
pic2 removed the paint - looks like a plated metal body.
pic3 - crushed it in a crimp tool - it's solid copper with tin plating!!!

[eccerr0r]

Re: What's the point of a 0Ω resistor?

Probably because the pick & place automated assembly can't handle straight wires.

[Stefan Payne]

Re: What's the point of a 0Ω resistor?

Was looking through some schematics and saw a 0Ω resistor. What is the point of having a resistor if it isn't even 1Ω?

There are various reasons, some are already mentioned.

But there's also another reason:
They are often used as a jumper nowadays. Like on AMDs Radeon RX480 reference Board, there are a couple of 0 Ohm Resistors used to adjust the distribution of power. Ie if the Power comes from the PCIe slot or the Power cable.

With this knowledge you can also modify some graphics cards to run either totally off the cable or the slot.

[TechGeek]

Re: What's the point of a 0Ω resistor?

Hmmm