Tripp Lite Protect It! 7-outlet surge protector coaxial 2160 joules 330/400/400 let through rating $17.95 at Amazon

https://www.amazon.com/dp/B0000510NU
$17.95 at Amazon (normally about $27 to $36). This is the best price since 2018.
Excellent surge protector from a great brand with 330V L-G; 400V L-N; 400V N-G let-through rating and 2160 joules rating. And it is not too bulky.
The joule rating is the total amount of energy the surge protector can absorb without failing, whether in a single event or over a series of spikes and surges. A larger joule rating means the surge protector can survive more events.
The let-through rating defines the average amount of voltage the surge protector "lets through" to the connected equipment following each surge or spike. The lower the let-through rating, the better the protection. The UL rating levels are 330, 400, 500 and 600 volts.
Most surge protectors do not disclose the let-through rating and focus on the less important joule rating.
Tripp-Lite guide: How to Choose the Best Surge Protector
Manufacturer spec page: https://tripplite.eaton.com/prote…SUPER7COAX
This is the same company that make the premium "Isobar" surge protectors.