We often get questions regarding the Moisture Sensitivity Level (MSL) of the Milli-Grid 87832 series of headers from Molex, such as 0878321421.
The available documentation does not list an MSL, but they are packaged in moisture barrier bags with desiccant and there are cautionary statements in the product specification document about moisture and the high temperature reflow process (seen below).
This information is confusing when the product has no MSL, so we reached out to Molex for clarification. Here is their response.
We do not have a direct MSL rating for this part, but Molex does have a recommended MSL guideline that we advise to follow for our Nylon parts. Please review Molex Technical Advisory (linked below); Advisory Number: AS-45499-001 Revision: B
moisture-spec (1).pdf (328.9 KB)
Applicable Part Numbers
| DigiKey Part Number | Manufacturer Part Number |
|---|---|
| WM23627TR-ND,WM23627CT-ND,WM23627DKR-ND | 0878320407 |
| WM7145TR-ND,WM7145CT-ND,WM7145DKR-ND | 0878320607 |
| WM12807TR-ND,WM12807CT-ND,WM12807DKR-ND | 0878325722 |
| WM18639-ND | 0878321020 |
| WM3967TR-ND,WM3967CT-ND,WM3967DKR-ND | 0878325822 |
| WM6813TR-ND,WM6813CT-ND,WM6813DKR-ND | 0878321207 |
| WM6815TR-ND,WM6815CT-ND,WM6815DKR-ND | 0878325623 |
| 23-0878321421-ND | 0878321421 |
| WM18641-ND | 0878321420 |
| WM14378TR-ND,WM14378CT-ND,WM14378DKR-ND | 0878321414 |
| WM3594TR-ND,WM3594CT-ND,WM3594DKR-ND | 0878325622 |
| WM20545TR-ND,WM20545CT-ND,WM20545DKR-ND | 0878326922 |
| WM3595TR-ND,WM3595CT-ND,WM3595DKR-ND | 0878325922 |
| WM6817TR-ND,WM6817CT-ND,WM6817DKR-ND | 0878325923 |
| WM12802TR-ND,WM12802CT-ND,WM12802DKR-ND | 0878320628 |
| WM20536-ND | 0878320826 |
| WM14376TR-ND,WM14376CT-ND,WM14376DKR-ND | 0878321014 |
| WM14379TR-ND,WM14379CT-ND,WM14379DKR-ND | 0878321614 |
| WM14816-ND | 0878321222 |
| WM14374TR-ND,WM14374CT-ND,WM14374DKR-ND | 0878320828 |
| WM17583-ND | 0878320810 |
| WM3932TR-ND,WM3932CT-ND,WM3932DKR-ND | 0878320606 |
| WM16286TR-ND,WM16286CT-ND,WM16286DKR-ND | 0878320406 |
| WM14377TR-ND,WM14377CT-ND,WM14377DKR-ND | 0878321028 |
| WM8613-ND | 0878321416 |
| WM4227-ND | 0878321010 |
| WM12804-ND | 0878321210 |
| WM18638-ND | 0878320820 |
| WM14380TR-ND,WM14380CT-ND,WM14380DKR-ND | 0878322014 |
| 23-0878320620-ND | 0878320620 |
| WM3592TR-ND,WM3592CT-ND,WM3592DKR-ND | 0878321006 |
| WM3593TR-ND,WM3593CT-ND,WM3593DKR-ND | 0878325422 |
| WM12805-ND | 0878321422 |
| WM18640-ND | 0878321220 |
| WM23630TR-ND,WM23630CT-ND,WM23630DKR-ND | 0878323414 |
| WM18644-ND | 0878322020 |
| 23-0878323020-ND | 0878323020 |
| WM14381TR-ND,WM14381CT-ND,WM14381DKR-ND | 0878325322 |
| WM14383TR-ND,WM14383CT-ND,WM14383DKR-ND | 0878326422 |
| WM18643-ND | 0878321820 |
| WM12803TR-ND,WM12803CT-ND,WM12803DKR-ND | 0878321206 |
| WM20544TR-ND,WM20544CT-ND,WM20544DKR-ND | 0878326622 |
| WM18718-ND | 0878322620 |
| WM3973TR-ND,WM3973CT-ND,WM3973DKR-ND | 0878326022 |
| WM18646-ND | 0878322420 |
| WM18648-ND | 0878324020 |
| WM25288TR-ND,WM25288CT-ND | 0878327422 |
| WM20535-ND | 0878320824 |
| WM20533TR-ND,WM20533CT-ND,WM20533DKR-ND | 0878320614 |
| WM14815-ND | 0878321026 |
| 23-0878320420-ND | 0878320420 |
| WM23628-ND | 0878321016 |
| WM20542TR-ND,WM20542CT-ND,WM20542DKR-ND | 0878325423 |
| WM20540TR-ND,WM20540CT-ND,WM20540DKR-ND | 0878325122 |
| WM14814-ND | 0878321022 |
| WM23629-ND | 0878323221 |
| WM9666-ND | 0878320816 |
| 900-0878320814TR-ND,900-0878320814CT-ND,900-0878320814DKR-ND | 0878320814 |
| WM14818-ND | 0878322016 |
| WM20539-ND | 0878321621 |
| WM14375TR-ND,WM14375CT-ND,WM14375DKR-ND | 0878321007 |
| WM20538-ND | 0878321423 |
| WM20543TR-ND,WM20543CT-ND,WM20543DKR-ND | 0878326223 |
| WM14813-ND | 0878320610 |
| WM12806-ND | 0878322021 |
| 23-0878323420-ND | 0878323420 |
| WM22216TR-ND,WM22216CT-ND,WM22216DKR-ND | 0878325522 |
| 23-0878322220-ND | 0878322220 |
| WM14382TR-ND,WM14382CT-ND,WM14382DKR-ND | 0878326122 |
| WM14928TR-ND,WM14928CT-ND,WM14928DKR-ND | 0878320807 |
| 23-0878325020-ND | 0878325020 |
| WM25180TR-ND,WM25180CT-ND,WM25180DKR-ND | 0878326222 |
| 23-0878324420-ND | 0878324420 |
| 900-0878325323TR-ND,900-0878325323CT-ND,900-0878325323DKR-ND | 0878325323 |
| WM23631TR-ND,WM23631CT-ND,WM23631DKR-ND | 0878326322 |
| WM20534-ND | 0878320622 |
| WM10854TR-ND,WM10854CT-ND,WM10854DKR-ND | 0878320806 |
| WM14817-ND | 0878321622 |
| WM20541TR-ND,WM20541CT-ND,WM20541DKR-ND | 0878325222 |
| WM16287-ND | 0878323420 |
| WM18642-ND | 0878321620 |
| WM20537-ND | 0878321221 |
| 0878320422-ND | 0878320422 |
| 0878320822-ND | 0878320822 |
| 0878320626-ND | 0878320626 |
| 0878320634-ND | 0878320634 |
| 0878320616-ND | 0878320616 |
| 0878321060-ND | 0878321060 |
| 0878321822-ND | 0878321822 |
| 0878321616-ND | 0878321616 |
| 900-0878321072-ND | 0878321072 |
| 0878320410-ND | 0878320410 |
| 0878320812-ND | 0878320812 |
| 0878321242-ND | 0878321242 |
| 0878321623-ND | 0878321623 |
| 0878325662-ND | 0878325662 |
| 0878322023-ND | 0878322023 |
| 900-0878321662-ND | 0878321662 |
| 0878320823-ND | 0878320823 |
| 0878320640-ND | 0878320640 |
| 0878321043-ND | 0878321043 |
| 0878322022-ND | 0878322022 |
| 900-0878326162-ND | 0878326162 |
| 0878325121-ND | 0878325121 |
| 0878320641-ND | 0878320641 |
| 0878321412-ND | 0878321412 |
| 900-0878320615-ND | 0878320615 |
| 0878320421-ND | 0878320421 |
| 0878320836-ND | 0878320836 |
| 0878322222-ND | 0878322222 |
| 0878320411-ND | 0878320411 |
| 0878320643-ND | 0878320643 |
| 0878325762-ND | 0878325762 |
| 0878321042-ND | 0878321042 |
| 0878326123-ND | 0878326123 |
| 0878323222-ND | 0878323222 |
| 900-0878320642-ND | 0878320642 |
| 0878321821-ND | 0878321821 |
| 0878320621-ND | 0878320621 |
| 0878320611-ND | 0878320611 |
| 0878321208-ND | 0878321208 |
| 0878321243-ND | 0878321243 |
| 0878325723-ND | 0878325723 |
| 900-0878325242-ND | 0878325242 |
| 0878320408-ND | 0878320408 |
| 0878324422-ND | 0878324422 |
| 900-0878322412-ND | 0878322412 |
| 0878320821-ND | 0878320821 |
| 0878320811-ND | 0878320811 |
| 0878323014-ND | 0878323014 |
| 0878320608-ND | 0878320608 |
| 0878325016-ND | 0878325016 |
| 0878320409-ND | 0878320409 |
| 900-0878322414-ND | 0878322414 |
| 0878321021-ND | 0878321021 |
| 0878324022-ND | 0878324022 |
| 0878321011-ND | 0878321011 |
| 0878323022-ND | 0878323022 |
| 0878325022-ND | 0878325022 |
| 0878322820-ND | 0878322820 |
| 0878322422-ND | 0878322422 |
| 0878322622-ND | 0878322622 |
| 0878321211-ND | 0878321211 |
| 0878326923-ND | 0878326923 |
| 0878320808-ND | 0878320808 |
| 0878320609-ND | 0878320609 |
| 0878325523-ND | 0878325523 |
| 0878323220-ND | 0878323220 |
| 0878324012-ND | 0878324012 |
| 0878326462-ND | 0878326462 |
| 0878327222-ND | 0878327222 |
| 0878321008-ND | 0878321008 |
| 0878323422-ND | 0878323422 |
| 0878326023-ND | 0878326023 |
| 0878322423-ND | 0878322423 |
| 0878327162-ND | 0878327162 |
| 0878323620-ND | 0878323620 |
| 0878320809-ND | 0878320809 |
| 0878325062-ND | 0878325062 |
| 0878326522-ND | 0878326522 |
| 0878323423-ND | 0878323423 |
| 0878321009-ND | 0878321009 |
| 0878327462-ND | 0878327462 |
| 0878325012-ND | 0878325012 |
| WM16197-ND | 0878323416 |
| 0878322621-ND | 0878322621 |
| 0878322623-ND | 0878322623 |
| 0878323023-ND | 0878323023 |
| 0878322221-ND | 0878322221 |
| 0878323021-ND | 0878323021 |
| 0878322421-ND | 0878322421 |
| 0878322821-ND | 0878322821 |
| 0878323421-ND | 0878323421 |
| 0878324220-ND | 0878324220 |
| 0878321816-ND | 0878321816 |
| 0878321209-ND | 0878321209 |
| 0878326423-ND | 0878326423 |
| 900-0878325030-ND | 0878325030 |
| 0878327423-ND | 0878327423 |
| 0878324021-ND | 0878324021 |
| 0878321814-ND | 0878321814 |
| 0878327122-ND | 0878327122 |
| 0878324423-ND | 0878324423 |
| 0878324421-ND | 0878324421 |
| 0878324620-ND | 0878324620 |
| 0878325021-ND | 0878325021 |
| 0878321823-ND | 0878321823 |
| 0878323820-ND | 0878323820 |
| 0878324221-ND | 0878324221 |
| 0878325223-ND | 0878325223 |
| 900-0878325562-ND | 0878325562 |
| 900-0878322060-ND | 0878322060 |
| 900-0878325823-ND | 0878325823 |
| 900-0878320462-ND | 0878320462 |