Is it possible to buy "resistors in series"?
There is nothing in the referenced website that would indicate that &quot;resistors in series&quot; is a component in itself. Why would you need to buy such a component when you can easily do it yourself with much more flexibility than any supplier could offer. Just look at the possibilities in purchasing a single resistor. Between the resistance value, power handling capability, tolerance, temperature range, etc. there are literally thousands of different resistors. It is hard enough for a distributor to stock even a fraction of the available resistors. How would they be able to handle resistors in series.  The possible combinations would literally run into the millions.In any case, it is actually rare in actual circuit design to have even 2 resistors in series.  Usually a designer can choose a single resistor to handle his requirements. In unusual circumstances such as when a particular resistance value is required that is not a standard value or a single resistor cannot handle the power or voltage requirements, then series resistors are used.