Zero-ohm axial lead resistor
Zero-ohm surface-mount resistorA zero-ohm link or zero-ohm resistor is a
wire link packaged in the same physical package format as a
resistor
A resistor is a passive two-terminal electronic component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active e ...
. It is used to connect traces on a
printed circuit board
A printed circuit board (PCB), also called printed wiring board (PWB), is a Lamination, laminated sandwich structure of electrical conduction, conductive and Insulator (electricity), insulating layers, each with a pattern of traces, planes ...
(PCB). This format allows it to be placed on the circuit board using the same
automated equipment used to place other resistors, instead of requiring a separate machine to install a
jumper or other wire. Zero-ohm resistors may be packaged like cylindrical resistors, or like
surface-mount
Surface-mount technology (SMT), originally called planar mounting, is a method in which the electrical components are mounted directly onto the surface of a printed circuit board (PCB). An electrical component mounted in this manner is referred ...
resistors.
Use
One use is to allow traces on the same side of a PCB to cross: one trace has a zero-ohm resistor while other traces can run in between the leads/pads of the zero-ohm resistor, avoiding contact with the first trace. Zero ohm resistors can also be used as
configuration jumpers or in places where it should be easy to disconnect and reconnect electrical connections within a PCB to diagnose problems.
The resistance is only approximately zero; only a maximum is specified, which is typically in the range of 10–50 m
Ω. However variants with ultra low resistance of under 0.5 mΩ are available.
A percentage tolerance would not make sense, as it would be specified as a percentage of the ideal value of zero ohms (which would always be zero).
However, it is common practice for manufacturers and retailers to list zero ohm resistors with a percentage tolerance.
In cases where a percentage tolerance is specified, this value generally refers to the tolerance class that should be referred to within the datasheet or parts catalogue in order to find the absolute maximum resistance specification for the 0Ω part.
An
axial-lead
In electronics, through-hole technology (also spelled "thru-hole") is a manufacturing scheme in which leads on the components are inserted through holes drilled in printed circuit boards (PCB) and soldered to pads on the opposite side, either ...
through-hole
In electronics, through-hole technology (also spelled "thru-hole") is a manufacturing scheme in which leads on the components are inserted through holes drilled in printed circuit boards (PCB) and soldered to pads on the opposite side, either ...
zero-ohm resistor is generally marked with a single black band,
the symbol for "0" in the
resistor color code
An electronic color code or electronic colour code (see spelling differences) is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, inductors, diodes and others. A separate code, the ...
.
Surface-mount
Surface-mount technology (SMT), originally called planar mounting, is a method in which the electrical components are mounted directly onto the surface of a printed circuit board (PCB). An electrical component mounted in this manner is referred ...
zero-ohm resistors are usually marked with a single or multiple "0" (if size allows marking), where the number of digits can indicate the tolerance or maximum resistance rating, as is the case with regular resistors.
They are often implemented as
thick film Thick-film technology is used to produce electronic devices/modules such as surface mount devices modules, hybrid integrated circuits, heating elements, integrated passive devices and sensors. The main manufacturing technique is screen printing (ste ...
resistors.
See also
*
Jumper (electrical)
In electronics and particularly computing, a jumper is a short length of conductor used to close, open or bypass part of an electronic circuit. They are typically used to set up or configure printed circuit boards, such as the motherboards of ...
*
Shunt (electrical)
A shunt is a device that is designed to provide a low-resistance path for an electrical current in a Electrical network, circuit. It is typically used to divert current away from a system or Electronic component, component in order to prevent over ...
*
Fuse (electrical)
In electronics and electrical engineering, a fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. Its essential component is a metal wire or strip that melts when too much current flows th ...
*
Bead (electrical)
A ferrite beadalso called a ferrite block, ferrite core, ferrite ring, EMI filter, or ferrite chokeis a type of choke that suppresses high-frequency electronic noise in electronic circuits.
Ferrite beads employ high-frequency current dissipati ...
References
External links
* {{commonscat-inline, 0 Ohm resistors
Why Zero-Ohm Resistors?
Resistive components