I recently bought some 0805 Multicomp PTC/resettable fuses from Farnell. They were MC36213 (500mA) and MC36206 (200mA). I plan to use these in product which may exist in a high humidity (~80-90%) environment, although that is not my main concern: instead, what is written on the package:
CAUTION: MOISTURE SENSITIVE DEVICES! The product in this package is a moisture sensitive device. The package in which it is supplied will offer physical and electrical protection but will not offer sufficient protection to prevent moisture ingress. These items should be baked for a minimum of 48 hours at 125C prior to reflow. Moisture sensitivity level: 4
Now, I have no idea how I will be able to bake them at 125°C for 48 hours. I do not have the ability to do so. Especially not at a reasonable price.
Do I have to do this, or is it a mistake? How can I prevent damage to these fuses from moisture? What happens if they do get moisture on them? Will they not work properly to protect a power supply against short circuits and over-current? How can I bake them at such a temperature? I plan to reflow them on a hotplate for the initial prototypes, but I'm not sure if that's the "reflow" they talk about.