What is the largest circuit breaker main available for 120/240v?

[Paintedcow]

100A to 400A are common for most homes. I have seen a 600A used for an industrial application, although that was 3 phase. Here is a 800A on Amazon. That's about as big as I am finding...

Do they get any larger?

[gfretwell]

Much bigger. I have seen computer room panels protected with 1600a breakers 208v 3 phase. Most companies list "low voltage" (