Contents
What is the power rating of my resistor?
The power rating of a resistor indicates how much power a resistor can handle before it becomes too hot and burns up. Power is measured in units called watts. The more watts a resistor can handle, the larger and more expensive the resistor is. Most resistors are designed to handle 1/8 W or 1/4 W.
What is a good ohm reading?
Depending on the type of LCD display, the meter should show either OL or a flashing 1 (both mean off limit). Now, short the test probes together to measure the lead resistance. A good set of test leads should normally measure about 00.1 Ohm (that is one tenth of 1 Ohm).
How do I calculate the power rating for zero ohm resistors?
Some datasheets provide a power rating for the 0Ω resistors. From what I have seen, some companies use the maximum resistance value to calculate a power rating. Others use the same rating value as the low ohm resistors in their product range. Some will clarify that jumpers only have a current rating.
Is there such a thing as a 0r resistor?
Now, 0R resistors aren’t exactly 0 ohms, more like a couple tens milliohms, so yes, they do have a max current and max dissipation power. It’s really stating the power rating of the resistor family it belongs to. Some 0R resistors are in place of a different value in future.
Is there 5% tolerance for 0 Ω resistors?
EEs often scoff at the 5 % tolerance specification for the 0 Ω resistor. The engineers at Yageo know that that doesn’t make sense, and if you take a good look at page 2 you’ll see that they don’t specify 5 % for the jumper at all:
How are zero ohm resistors different from wire wound resistors?
A zero-ohm resistor can be wire wound or it can be surface mount. For surface mount resistors, there wil be a ‘0’ on it indicating it is a zero-ohm resistor. You can see this on the image below. For wire wound resistors, there will be a single black color band around the body of the resistor.