The packing set
- Moisture barrier bag. A sealed bag with a low moisture transmission rate and ESD protection.
- Desiccant. Absorbs moisture inside the sealed bag.
- Humidity indicator card. Shows how much moisture is inside.
- Warning label. Shows the moisture sensitivity level and the floor-life rules.
Moisture sensitivity levels
Parts are classified by moisture sensitivity level (MSL) under IPC/JEDEC J-STD-020. A higher level means a shorter allowed time out of the bag. Handling, baking and storage rules are in JEDEC J-STD-033. Always follow the part maker label.
Good practice
- Seal bags after use with the desiccant and card inside.
- Check the card when you open the bag.
- Log the time parts are out of the bag.
- Bake and re-pack as the label says.
Use the packing method set by the component maker and your own process.
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