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Usage of Jumpers |
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Zero-Ohm resistors (Jumper Wires) |
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Resistors of extremely low resistance
are named jumper chips or jumper lead by their shape. They can be handled with
automatic mounting machines as ordinary resistors.
They are used not only for single side PCB that has no through-hole but for
double-sided PCB. An application is used as a dummy, when through-holes for
a not- yet- designed- resistor are prepared by way of precaution, and the holes
are short-circuited after all. Another application is to make a path for large
current because the resistance of jumpers is lower than that of through-holes,
and sometimes physically shorter. This application is suited for grounding
circuit instead of silver base through holes.
Even if the resistance is minuscule, it is not absolutely zero because of the
structure. Use Jumper Wires J-Z,
JL for circuits where such a little
resistance may not be allowed. Metal-plate chip resistors TLR and
Current Detecting Resistors TSL
SL are also suitable to add to
them. |
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| Style |
Type |
Part |
Resistance |
| Rectangle, chip |
Rectangle chip resistor |
RK73Z |
50m max. |
Cylindrical chip
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MELF |
CC |
20mmax. |
| Lead wire |
Insulator coated |
Z |
20mmax. |
| Lead wire |
Insulated jumper wire |
J-Z |
0.8m/cm |
| Lead wire |
Jumper wire |
JL |
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Note: Be careful of the interference
between signals through jumper and that of PCB pattern for high frequency applications |
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Application Notes
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