Sourcing high voltage isolation switch for 150V @ 40A

[stube401]

Any ideas who might be able to supply a high voltage isolation switch capable of handling a constant 150V @ 40A?? The Jaycar SF2245 ones I selected weren't up to the job and began to melt (I thought they might!!)

http://www.jaycar.com.au/productView.asp?ID=SF2245&keywords=sf2245&form=KEYWORD

I've tried all the usual suspects RS, Farnell etc. I live in QLD, Australia, but worldwide shipping is no problem.

 

[indulis]

For those kind of current levels, look into "mercury contactors".