Discussion Overview
The discussion revolves around the tolerance rating of 0 Ohm resistors, commonly referred to as jumper resistors. Participants explore the rationale behind the 5% tolerance rating, the implications of resistance in practical applications, and the distinction between 0 Ohm resistors and fuses.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant questions the logic of a 5% tolerance on a 0 Ohm resistor, noting that 5% of 0 Ohms remains 0 Ohms and suggesting a fixed tolerance might be more appropriate.
- Another participant humorously acknowledges the common joke in electrical engineering regarding the tolerance of zero ohm jumpers.
- It is mentioned that 0 Ohm jumpers are typically manufactured using resistor fabrication techniques, implying that there is a finite resistance associated with them, which may be relevant for certain applications.
- A participant suggests that the datasheet for a 0 Ohm jumper should provide a practical maximum resistance, and if not, one could use 5% of the next higher resistor value, typically 1 Ohm.
- One participant asserts that 0 Ohm resistors are not designed to act as fuses, clarifying their use as option straps or grounding paths in PCB designs.
- Another participant adds that while 0 Ohm resistors are not intended to function as fuses, they can be used in configurations where they may blow under certain conditions, such as short circuits.
Areas of Agreement / Disagreement
Participants express differing views on the purpose and application of 0 Ohm resistors, particularly in relation to their function as fuses. There is no consensus on the appropriateness of the tolerance rating or the best way to express it.
Contextual Notes
Participants note the limitations of using 0 Ohm resistors in applications requiring reliable fusing, highlighting concerns about the construction and potential failure modes.