In the past Kemet has had very limited concerns from customers in tropical regions of the world that V cases were susceptible to cracking due to out-gassing from absorbed moisture. This has been a very small incidence rate. In order to address those concerns, they chose to package V cases in moisture-protection packaging. However, the parts have passed all requirements for MSL1 testing and are therefore by definition MSL1 devices. Please contact a Mouser Technical Sales Representative for further assistance. 5-0710-38