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popoyboys
Joined: 20 Feb 2007
Posts: 108
Helped: 1
Location: from the deepest roots of KAMOTE land
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 28 Feb 2008 8:54 0-ohm resistor |
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what is the purpose of a 0-ohm resistor placed in a circuit?
what is its significance compared to a circuit without it?
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mister_rf
Joined: 27 Feb 2008
Posts: 238
Helped: 57
Location: Romania
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| 28 Feb 2008 9:14 Re: 0-ohm resistor |
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Sometimes it’s used like a 'bypass' or like a fuse. Probably it’s more simple to separate the circuit in different areas in order to test it separately...
So a 0 ohm resistor has no influence in the circuit.
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test_out
Joined: 10 Feb 2006
Posts: 132
Helped: 23
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| 28 Feb 2008 9:25 0-ohm resistor |
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| Sometime they use 0ohm register in the schemetic for checking the current of a certain part of the circuit.
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popoyboys
Joined: 20 Feb 2007
Posts: 108
Helped: 1
Location: from the deepest roots of KAMOTE land
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| 28 Feb 2008 9:41 Re: 0-ohm resistor |
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| test_out wrote: |
| Sometime they use 0ohm register in the schemetic for checking the current of a certain part of the circuit. |
For checking, why not use a testpoint instead?
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rjainv
Joined: 18 Feb 2007
Posts: 145
Helped: 11
Location: Bangalore, India
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| 28 Feb 2008 10:22 Re: 0-ohm resistor |
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| popoyboys wrote: |
| test_out wrote: |
| Sometime they use 0ohm register in the schemetic for checking the current of a certain part of the circuit. |
For checking, why not use a testpoint instead? |
how will you measure current using testpoint ?
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satya_vijayawada
Joined: 17 Aug 2005
Posts: 135
Helped: 11
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| 28 Feb 2008 11:33 Re: 0-ohm resistor |
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| popoyboys wrote: |
what is the purpose of a 0-ohm resistor placed in a circuit?
what is its significance compared to a circuit without it? |
some times limited jumpers used in single side pcb (Government and some special application ), so in that jumper place u can use 0-ohm ressiter.
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Iouri
Joined: 17 Aug 2005
Posts: 685
Helped: 78
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| 28 Feb 2008 19:36 0-ohm resistor |
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| 0 ohm resistor cost less then jumper and instalation time smaller
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svet-am
Joined: 19 Feb 2008
Posts: 8
Helped: 1
Location: Denver, CO
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| 28 Feb 2008 23:14 Re: 0-ohm resistor |
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I use 0Ohm resistors a lot of separate my design into sections. If I want to bring a design online incrementally then I'll simply use a 0Ohm resistor and no-pop it from the factory. Then, as I test the board in my lab, I simply solder in a 0Ohm resistor to complete the circuit and bring the new section online.
I've also seen them used (though I've not used them this way myself) in analog circuits, particularly filters, where the same basic PCB will be used with separate filters. The 0Ohm resistor can be used as a jumper to enable/disable a particular filter in the design.
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sparso
Joined: 30 Dec 2006
Posts: 63
Helped: 1
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| 02 Mar 2008 8:56 0-ohm resistor |
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0 ohms are mostly used as shorts i.e. place holders.
Say you are not sure if AC coupling is going to work in your circuit you place a 0 ohm in the place of the cap and run the chip in DC coupling mode. Then if you want to try AC coupling you can replace the 0 ohm with the AC coupling cap and try out that system. It is not used
for current measurement. a small value like .3 ohm is usually used for current measurement. You can measure the voltage across the .3 and you know the R so ohms law wil give you the I.
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rizwanspirit
Joined: 22 Feb 2008
Posts: 59
Helped: 2
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| 02 Mar 2008 9:13 Re: 0-ohm resistor |
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To serve as an inexpensive jumper or prorammable switch.
DIP switches are pretty expensive and bulky and unreliable.
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dziobak10
Joined: 05 Mar 2008
Posts: 1
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| 05 Mar 2008 21:23 Re: 0-ohm resistor |
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| rizwanspirit wrote: |
To serve as an inexpensive jumper or prorammable switch.
DIP switches are pretty expensive and bulky and unreliable. |
Oh yes
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muralicrl
Joined: 06 Feb 2008
Posts: 281
Helped: 30
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| 11 Mar 2008 6:05 Re: 0-ohm resistor |
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Hi,
In case if you are not sure whether you need to put a resistor or not, then provide a place for it. Later if you know put a particular R value otherwise 0 ohm.
If you need more details, contact me.
Regards,
N.Muralidhara
CRL-BEL
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jeyaraman
Joined: 15 Mar 2008
Posts: 8
Location: Kuala Lumpur, Malaysia
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| 16 Mar 2008 13:43 Re: 0-ohm resistor |
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I have used them in all the capacities mentioned above
- jeyaraman
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Abdul Manan
Joined: 10 Nov 2007
Posts: 63
Helped: 6
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| 22 Mar 2008 19:09 0-ohm resistor |
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0 ohm resistor cost less then jumper and instalation time smaller
agreed to Iouri
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wing210
Joined: 28 Jan 2008
Posts: 7
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| 24 Mar 2008 11:14 Re: 0-ohm resistor |
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Are you shure it's 0 ohm?
Isn't it 0.1 ohm or 0.2...?
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ultrabrains
Joined: 14 Feb 2007
Posts: 113
Helped: 8
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| 24 Mar 2008 12:27 0-ohm resistor |
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| i simply use them as jumpers, they make my circuits neat instead of having wires every where on my pcb
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s_brune
Joined: 28 Feb 2008
Posts: 11
Helped: 1
Location: USA, MI
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| 24 Mar 2008 18:01 Re: 0-ohm resistor |
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We use them at my work to switch in/out optional features on our products.
The optional circuit features would be populated on the board and the 0 ohm resistor that bypassed them would be removed.
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echo47
Joined: 07 Apr 2002
Posts: 4212
Helped: 564
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| 24 Mar 2008 23:50 0-ohm resistor |
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| We bought a reel of 0-ohm resistors that were marked by the manufacturer as 5% tolerance. I understand why they did that, but it's still amusing.
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FvM
Joined: 22 Jan 2008
Posts: 2315
Helped: 385
Location: Bochum, Germany
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| 25 Mar 2008 0:12 Re: 0-ohm resistor |
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| Quote: |
Are you shure it's 0 ohm?
Isn't it 0.1 ohm or 0.2...? |
Yes, in full datasheets there is a specification for jumper components, e. g.:
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| The jumper has a maximum resistance Rmax = 50 mΩ and a rated current IR = 2 A. |
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farin
Joined: 04 May 2006
Posts: 17
Location: Czech republic
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| 26 Mar 2008 7:43 Re: 0-ohm resistor |
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| I think, there is one other purpose of 0 ohm resistor. In HF technologies, there is sometimes better to use a 0 ohm resistor instead 2 vias, cos via has higher inductance and you don't have to go to the other side of PCB. In this case, you use 0 ohm resistor as some "bridge".
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nidhisahu
Joined: 14 Sep 2007
Posts: 31
Helped: 1
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| 26 Mar 2008 17:41 0-ohm resistor |
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in plant where circuit are build
0 ohm resister are used because
any one can achive this by short
circuit any two points but robotic hand
which assemble circuit need component
to place
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amrendra
Joined: 24 Sep 2007
Posts: 4
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| 06 May 2008 9:30 Re: 0-ohm resistor |
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| Can anyone explain like what is the meaning of X% tolerance in case of 0E resistor. I got amused by seeing the tolerance specification for 0E like 5% or 1% 0E resistor.
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cyberrat
Joined: 19 Jun 2001
Posts: 894
Helped: 31
Location: In the sewers of the U.K.
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| 06 May 2008 16:48 0-ohm resistor |
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All of the above....
And the manufacturers are bound by their coding system to put a tolerance otherwise the system throws it out.
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AdvaRes
Joined: 14 Feb 2008
Posts: 594
Helped: 28
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| 06 May 2008 17:32 0-ohm resistor |
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| Why do not use a simple wire ?
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cyberrat
Joined: 19 Jun 2001
Posts: 894
Helped: 31
Location: In the sewers of the U.K.
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| 08 May 2008 17:28 0-ohm resistor |
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Sometimes a wire is harder to place on the board.
I.E. if it's SMT then an SMT Zero ohm component is needed. Also it need to be the same size of any possible resistor/capacitor put there if its for an
optional part.
(Placement machines cannot pick up wire links but they can flat resistor packages).
There is also the issue of cost, simple wire has more copper in it to enable it to be thick enough to handle.
Copper is a high value resource now.
And there is an operation needed to cut it to size and bend to shape.
So sometimes a pre prepared component can be cheaper than simple wire. Crazy I know.
Although, if you have high current or very long links needed then the wire is usually best.
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echo47
Joined: 07 Apr 2002
Posts: 4212
Helped: 564
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Filtronetics
Joined: 10 Nov 2004
Posts: 34
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| 09 May 2008 20:13 0-ohm resistor |
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| 0ohm resistor might be the most used component in the circuit.
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crenyen
Joined: 16 Sep 2004
Posts: 69
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| 12 May 2008 7:20 0-ohm resistor |
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| Sometimes we can use bypass capacitor to replace 0R resistor if DC blocking is taken into consideration.
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ssankurathri
Joined: 16 Mar 2006
Posts: 90
Helped: 5
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| 05 Jun 2008 15:55 Re: 0-ohm resistor |
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hi
could anyone plz tell me how much current a zero ohm resistor can withstand?
will it allow infinite amount of current as it can be treated as a short wire?
regards
skr
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echo47
Joined: 07 Apr 2002
Posts: 4212
Helped: 564
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| 05 Jun 2008 16:15 0-ohm resistor |
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Many zero-ohm resistors are fabricated like ordinary resistors. They aren't quite zero ohms, and won't survive much current.
Other types are make from little copper bars, and can carry amps.
You should refer to the data sheet for your particular part.
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