J-STD-033 has the "derating" tables you're looking for. -----Original Message----- From: Bob Perkins [mailto:[log in to unmask]] Sent: Monday, February 11, 2002 3:54 PM To: [log in to unmask] Subject: [TN] FW: Moisture Sensitive Devices Hi all, Regarding moisture sensitive devices, all the levels I see are in respect to <= 30c 60%RH. The time specified for these levels are clear but what if I am dealing with 30%RH. Is there a sliding scale that is applied to this level of humidity or do I strickly go with the times given at 60%RH.. ex. The level 5 component has 48 hours, would that be 96 hours on my production floor if I'm at 30% RH ? Thanks Bob P