For a 1 inch wide bus bar that is 1/4" thick, a 1/8" thick PCB (that acts both as the spacer and board you solder the chip to) gives a range of about -1200, to 1200amp. So, you would need another 1/8" spacer to get close to 2400amp. That's only for the Melexis HB, though. The LB needs probably 1.5" or something ridiculous.
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