switches do not have an AIC rating, just a sccr. only things that can clear a short circuit have an aic rating.
That's right. A non-fused disconnect will have a very low SCCR, usually no more than 10kA. A Fused disconnect will have a higher SCCR because the fuses will clear the fault, so generally the SCCR of a fused disconnect is the same as the IC rating of the fuses in it; i.e. 100kA or 200kA if used with that kind of fuse.
"Disconnect Switches" can be UL listed under UL98 or UL508. The difference is, the cheaper UL508 listed switches cannot be used as branch circuit devices all by themselves, they must have another device ahead of them, such as a UL98 listed switch or a UL489 listed breaker. So the only real use for UL508 listed switches is as a local LO/TO at or near the motor when there is another device, like a combination starter, ahead of it somewhere.
But as far as the switch itself goes, UL98 requires that a disconnect have a HP rating and be capable of interrupting multiple times its rated load (I think it is 200-300%, but I don't have my copy here) repeatedly in rapid succession. UL508 does not have the same test requirements, but it does require that a disconnect used in a motor circuit have a HP rating.