I thought the same thing, and sure enough, they make one rated at 250VAC/600VDC, see here:
https://www.mouser.com/ProductDetail/Cornell-Dubilier-CDE/254M06QD150?qs=/ha2pyFaduiT2OuLeU%2BQv17kdzKETcwFlKKKjZztZZnWBoPYez0xBQ==
But the one, above, rated at 250VAC does not comply with UL1414/CSA-C22.2 No. 1. Meaning is is not suitable for use "across the line" applications. I have never read those references, but I will download them and read them the next time I am suffering from acute insomnia.
With reference to a power surge from a lightning storm - From articles in
Windpower Engineering & Development, we learn that lightning bolts carry from 5 kA to 200 kA and voltages vary from 40 kV to 120 kV. The outcome also is unpredictable—a strike that occurs a mile away can generate 70 V in electrical cables, and another can generate 10 kV from 160 yards away. So, no device can protect our precious audio devices from a direct or indirect hit.
The real purpose of these "Quencharc" devices is to protect the contacts of the power switch (or relay) from arcs, sparks, and transients to extend the operating life of these devices. If you are looking for protection from power surges, that is a different product. These come to mind:
https://www.bestbuy.com/site/audioq...rotector-black-silver/6320328.p?skuId=6320328
or,
https://www.techhive.com/article/3281455/apc-surgearrest-performance-p12u2-review.html
Finally, you can add the optimum surge protection inside the equipment yourself by installing (3) 130VAC Metal-Oxide Varistor (MOV) sacrificial devices across the AC lines, (1) from Line to Neutral, (1) from Neutral to Ground, and (1) from Line to Ground. These are good and new:
https://www.mouser.com/ProductDetail/Bourns/GMOV-20D131K?qs=sGAEpiMZZMuQmL5N8IqpX5jFkXwxQwBHR4M7hA/ej5U=
or
https://www.mouser.com/ProductDetail/Bourns/GMOV-14D131K?qs=sGAEpiMZZMuQmL5N8IqpX5jFkXwxQwBHlHxvukv%2BFo8=
Sorry for the long-winded explanation...