Feature
MSL lookup
Moisture sensitivity level, defined by IPC/JEDEC J-STD-020, classifies how long a moisture-sensitive surface-mount part can sit at factory floor conditions after its bag is opened before it must be reflowed — or baked out first. Get the wrong rating and a part can pop or delaminate in reflow. chip.parts looks it up per part, not per guess.
- FEATURE
- MSL lookup
- INPUT
- MPN list
- OUTPUT
- MSL rating · source · export
- STANDARD
- IPC/JEDEC J-STD-020
- STATUS
- LIVE
Process
From part number to floor-life plan
- 1
Submit MPNs
Paste or upload the part numbers you need MSL ratings for, whether that's a full BOM or a handful of parts flagged by your line.
- 2
Rating lookup
chip.parts checks manufacturer documentation for each part's MSL classification under J-STD-020, from MSL 1 (unlimited floor life) through the more restrictive levels.
- 3
Confirmation
Where a manufacturer publishes the rating directly on a datasheet or a separate classification report, chip.parts links back to that source alongside the value, so it's checkable rather than taken on faith.
- 4
Export
Get MSL ratings back matched to your original list, so stores and production can plan floor life, bake-out ovens, and moisture barrier bag handling before parts go stale.
Not every part is moisture-sensitive, and not every manufacturer publishes a rating in the same place. Where chip.parts can't confirm a rating from the manufacturer's own documentation, it says so instead of assuming a default level.
The rating matters most at the boundary between stores and the line: once a moisture barrier bag is opened, the clock on floor life starts, and a part sitting in an unsealed tray past its rated window can carry enough absorbed moisture to flash to steam during reflow — enough to crack the package or lift a bond wire. Knowing the level before the bag is opened is what makes a bake-out a planned step instead of a rework ticket.
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