Part Information Review and Verification

flux

Part review summary
I reviewed the current part project against the datasheet URL already on the project, so I did not change the Datasheet property. The review flow I followed is consistent with the part-project sync guidance: verify the Datasheet URL first, then compare project properties and terminals against the datasheet, and only update missing/incorrect fields when the datasheet is authoritative
What is currently in the project

Table

FieldCurrent valueReview result
Manufacturer Part NumberBMI-S-203-FNeeds attention
Manufacturer NameLairdLikely OK
Designator PrefixUUnusual for this part type
Datasheet URLSetPresent, so no web search/update was needed
DescriptionEMI Gaskets, Sheets, Absorbers & Shielding SBS,FRAM,TnRMismatch / low quality
Schematic symbol20 terminals numbered 1 to 20Needs verification
Footprint20 pads numbered 1 to 20Needs verification
Pin Type metadataAll terminals = UnspecifiedIncomplete
Datasheet facts I could confirm
From the linked Laird PDF, the part is described as a Standard Surface Mount Shields-Two-Piece family item, with these retrieved specs:

Table

Datasheet itemValue
DescriptionStandard Surface Mount Shields-Two-Piece
Maximum overall dimension26.21 mm x 26.21 mm
Maximum overall height5.08 mm
Surface area666.16 mm²
Material thickness0.20 mm
Material0.20 mm CRS Tin
Weight1.0 g
PackagingEIA-481
Carrier tape width44 mm
Carrier tape pitch32 mm
Reel diameter330 mm
Parts per reel300
Coplanarity** 99%**
The same retrieved datasheet content also explicitly does not include a pin table, pin names, terminal descriptions, footprint recommendation, or recommended land pattern. The only pin-related text retrieved is a list of compatible device/package categories like 32/44/52 pin PLCC, 121/169 BGA, 48/100 VQFP, and 44/48/64/80 QFP; it does not provide a terminal map for this shield itself
Key mismatches and issues 1. Description mismatch
Your current description says:
  • EMI Gaskets, Sheets, Absorbers & Shielding SBS,FRAM,TnR
But the linked datasheet content identifies the item as:
  • Standard Surface Mount Shields-Two-Piece
So the description is currently too generic and does not match the datasheet wording well. The sync guidance specifically recommends a crisp functional description based on the datasheet rather than a vague category string
2. MPN looks potentially inconsistent
The project MPN is BMI-S-203-F, but the datasheet content I could retrieve is branded around BMIS-203 / Item # BMIS-203. That suggests one of these is true:
  • BMI-S-203-F is a valid ordering suffix/variant of the BMIS-203 family, or
  • the project MPN has a typo / formatting mismatch.
I can’t resolve that conclusively from the current PDF extract alone, so I’m flagging it as a likely metadata mismatch.
3. Symbol cannot be verified from the datasheet
The project symbol currently has 20 numbered terminals, all with Pin Type = Unspecified. For a part-project audit, the rule is to match terminal count and pin definitions exactly to the datasheet and never guess pin assignments
Here, that verification is not possible because the retrieved datasheet content has:
  • no pin table
  • no pin names
  • no terminal descriptions
  • no explicit terminal count for the shield itself
So I cannot confirm whether the 20-terminal symbol is correct or incorrect from the datasheet.
4. Footprint cannot be verified from the datasheet
The PCB model currently has 20 pads numbered 1 to 20, matching the schematic terminal count. However, the retrieved datasheet content includes only overall mechanical dimensions and tape-and-reel data, with no recommended land pattern or footprint drawing
That means I cannot verify:
  • pad count
  • pad geometry
  • pad spacing
  • courtyard / outline accuracy
  • whether the 20-pad footprint matches the official recommended layout
5. Terminal metadata is incomplete
All 20 terminals are present only as numbered terminals with:
  • Pin Number set
  • Pin Type = Unspecified
  • no pin descriptions
The sync guidance says those fields should be filled from the datasheet when available, but should not be guessed when the datasheet lacks authoritative pin info
For this part, since the datasheet extract does not provide terminal definitions, leaving them unspecified is safer than inventing them.
Overall assessment Confirmed OK

Table

ItemStatus
Datasheet URL presentOK
Manufacturer name broadly matches Laird/Laird TechnologiesOK
Basic mechanical specs in project context can be derived from datasheet if neededOK
Flagged

Table

ItemStatus
Project descriptionMismatch
MPN BMI-S-203-F vs datasheet BMIS-203 family namingPotential mismatch
Symbol pinoutUnverifiable from current datasheet
Footprint pad patternUnverifiable from current datasheet
Pin descriptions / pin typesMissing, but datasheet does not support filling them confidently
Designator prefix UProbably not ideal for a shield/mechanical part
Recommended next steps
  1. Check whether BMI-S-203-F is the exact ordering code for the BMIS-203 family.
  2. Update the project description to something like:
    Two-piece SMT EMI shield frame and cover, 26.21 mm x 26.21 mm max, 5.08 mm height, 0.20 mm CRS tin
  3. Do not auto-edit pin descriptions or pin types unless you have a more detailed mechanical drawing or footprint drawing from Laird.
  4. Find a mechanical drawing / recommended land pattern for the exact suffix if you want a real symbol/footprint verification. The current linked PDF is not enough to validate the 20-pad implementation.
If you want, I can do the next pass and clean up the project metadata/description now, then separately search for a more exact mechanical drawing or official land-pattern document for BMI-S-203-F.
Fix flagged mismatches
Review power parts first
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BMI-S-203-F

BMI-S-203-F thumbnail
RF Shield Frame 1.032" (26.21mm) X 1.032" (26.21mm) Surface Mount The BMI-S-203-F is a surface-mount EMI shield frame (part of a board-level shielding system) manufactured by Laird (now part of DuPont Performance Materials). It is used to enclose and isolate sensitive components on a PCB, helping prevent signal interference and improving electromagnetic compatibility (EMC). It typically comes as a one-piece or frame-style shield that is soldered directly onto the PCB, forming a metallic “cage” over critical circuits. Key Characteristics Product Type: Board-level EMI/RFI shielding enclosure Shield Style: Surface-mount frame (soldered to PCB) Dimensions: ~26.21 mm × 26.21 mm × 5.08 mm Construction Material: Typically cold rolled steel or similar conductive metal Finish: Tin-plated for good solderability Mounting: SMT (surface mount technology) Configuration: Designed for use with cover lids or as part of a two-piece shielding system Function Blocks unwanted electromagnetic interference (EMI) Prevents RF noise from affecting nearby sensitive circuits Improves signal integrity in high-speed or RF designs Helps meet EMC regulatory requirements Typical Applications RF modules and wireless circuits IoT devices Smartphones and compact electronics Communication systems High-speed digital and mixed-signal PCBs #RF-shield #SMT 2 Piece

Properties

BMI-S-203-F

Laird

RF Shield

media.digikey.com/pdf/Data%20Sheets/Laird%20Technologies/BMI-S-203.pdf

U

creativecommons.org/licenses/by/4.0/

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