Electronics Forum: 33b01 (Page 1 of 1)

PCB & MSD Component baking oven

Electronics Forum | Fri Dec 03 04:11:47 EST 2010 | grahamcooper22

A baking oven over 100 C will be at zero humidity. Do you really need to store pcbs/devices at 200 C...this will surely harm some products ? IPC 33B01 allows storage of MSDs in a dry cabinet at less then 5%.....these can operate at room temp or 40 /

Air Moisture in Production

Electronics Forum | Thu Dec 09 10:40:45 EST 2010 | grahamcooper22

MSL 3 means you can have the devices open for a maximum of 168 hours in an atmosphere of less then or equal to 30 C and 60% RH. If the humidity is less then 60% then it means the devices will absorb less moisture in a given time, but even at 40% RH y

5% color spot in HIC

Electronics Forum | Mon Jul 23 08:35:33 EDT 2012 | grahamcooper22

The lower the RH in the MBB the better for all moisture sensitive devices. Maintaining less then 5% will mean no parts of between 2a-5a MSL will need drying before use. The calculation uses 10% because it is a sensible amount of desiccant to use base


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