The curie temperature of the alloy is the maximum temperature.
I see now. Do the METCALs operate the same? I presume so. I like the size of the iron on these but my iron's just fine and I don't need 5.
Yes. As far as I know, the Thermaltronics units are functionally identical and actually designed by the same team.
Yes Thermaltronics was founded by some ex-Metcal employees once the original Metcal patents expired a few years ago.
Easy Braid solder stations are just re-badged Thermaltronics and primarily sold at Digi-Key.
http://www.thermaltronics.comhttp://www.easybraidco.com/hand-solderingThermaltronics/EasyBraid is cross compatible with Metcal/Oki, so you can use tips from one manufacturer in the hand piece of another. And even use a hand piece from one manufacturer with the power supply of another.
But there's different series from each manufacturer. The most expensive series operate at 13.56 MHz, while the cheaper on ones operate at 470 KHz. So make sure to always buy accessories/replacement parts for the correct series regardless of what brand you buy from.
Thermaltronics to Metcal Tips Cross Reference
http://www.thermaltronics.com/references.phpEasyBraid to Metcal Tips CrossReference
http://www.easybraidco.com/cross-references.php?competitor=4The RF soldering technology used, patents etc. are discussed is this
DIY Metcal 13.56 MHz RF Supply topic
https://www.eevblog.com/forum/projects/diy-metcal-13-56-mhz-rf-supply/150/Based on this topic you can build you own 13.56 MHz power supply compatible with the high end hand pieces and tips from both Oki/Metcal and Thermaltronics/EasyBraid.
Or even if you don't want to build you own, you can just read the topic to learn a lot about how this unique Metcal RF solder station technology works and how the tip temperature is kept constant.