Part Data Review and Verification

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Looking for "5051102091 overall dimensions recommended pcb layout dimensions contact numbering and pin 1 orientation" in 5051100592_sd.pdf?inline

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Part audit: Molex 5051102091

1) Available part information


FieldValue
ManufacturerMolex
MPN5051102091
Part typeConnector
Project descriptionEasy-On FFC/FPC Connector, 0.50 mm pitch, FD19 series, right-angle, bottom contact, 1.90 mm height, 20 circuits, gold over nickel plating
Designator prefixJ
Schematic symbol contents20 signal terminals + 2 fitting-nail terminals
Footprint contents20 signal pads + 2 mounting/fitting-nail pads
3D model asset5051102091.stp
Footprint asset5051102091.kicad_mod
2) Datasheet URL check
The part already has an official Molex datasheet URL set in project properties:
Because a valid official URL is already present, no web lookup or replacement was needed.
3) Datasheet metadata summary

Overview


ItemDatasheet value
SeriesFD19 / 505110
Connector typeEasy-On FFC/FPC connector
Circuits20
Pitch0.50 mm
OrientationRight-angle
Contact positionBottom contact
Mated height1.90 mm
PackagingEmbossed package
Compliance/featuresRoHS, halogen free, locking actuator

Electrical characteristics


ParameterDatasheet value
Current rating0.5 A
Voltage rating50 V
Contact resistance40 mΩ max
Insulation resistance100 MΩ min
Dielectric withstanding voltage250 V AC for 1 minute
Absolute maximum ratings
This connector datasheet does not present a semiconductor-style Absolute Maximum Ratings table. The relevant published limits are the connector ratings above plus temperature/mechanical limits below.

Recommended operating conditions / use conditions


ParameterDatasheet value
Operating temperature-40 C to +105 C
Applicable FPC/FFC thickness0.30 mm +0.04 / -0.03
Also seen in series drawing0.30 mm +0.04 / -0.03 to 0.35 mm +0.04 / -0.03
Recommended base film thickness25 um
Recommended conductor thickness35 um or 50 um
Mating cycles20 cycles

Materials and plating


ItemDatasheet value
HousingLCP, glass filled, UL94V-0, beige
ActuatorPA, glass filled, UL94V-0, black
Terminal materialPhosphor bronze
Fitting nail materialPhosphor bronze
Contact area platingGold, 0.05 um minimum
Solder tail platingGold
Terminal underplateNickel, 1.0 um minimum
Fitting nail platingTin, 1.0 um minimum
Fitting nail underplateNickel, 1.0 um minimum

Pin / terminal description


ItemDatasheet finding
Signal contacts20 signal contacts
Mechanical tabs2 fitting nails / mounting pads
NumberingSingle row of 20 contacts plus 2 fitting nails
Pin 1 orientationNot cleanly recoverable from text extraction alone
Package / recommended PCB layout dimensions
The official drawing text extraction is incomplete, but the following values were recoverable for the 20-circuit 5051102091 variant:

Table


CategoryDatasheet value
Recommended PCB layout A10.5 mm
Recommended PCB layout B13.1 mm
Recommended PCB layout C9.5 mm
Recommended PCB layout D14.7 mm
Embossed package A10.9 mm
Embossed package B14.9 mm
Embossed package C16 mm
Pitch0.50 ±0.05 mm
4) Symbol and footprint cross-check

Cross-check results


CheckResultNotes
Contact countPassSymbol and footprint both represent 20 contacts.
Fitting nails / mounting padsPassSymbol includes 2 fitting-nail terminals and footprint includes 2 larger pads.
Pitch consistencyPassFootprint uses 0.50 mm contact spacing, matching the datasheet.
Bottom-contact / right-angle typePassProject metadata matches datasheet description.
Height / product familyPassProject description matches the Molex part overview.
Footprint pad topologyPassSingle fine-pitch signal row plus two larger mechanical pads is consistent with the datasheet.
Pin numbering orientationNeeds manual visual checkI could not conclusively verify pin 1 left/right orientation from machine-extracted drawing text alone. This is the main residual risk.
Plating metadata wordingMinor metadata mismatchProject description says gold over nickel plating, but the drawing is more specific: fitting nails are tin over nickel, while signal contacts are gold over nickel. Not a footprint failure, but metadata could be more precise.
Issues that could matter
  • Highest-risk item: contact numbering orientation.
    If the footprint is mirrored relative to the official Molex drawing, the cable pinout would be reversed even though pad count and pitch are correct. That can cause:
    • incorrect board function
    • apparent assembly success but electrical failure
    • wrong mating orientation in-system
  • Minor documentation issue: plating description is simplified in the project metadata.
    That is unlikely to cause board failure, but it could cause ordering ambiguity if this part project is reused downstream as a purchasing reference.
Bottom line
  • The part project looks mostly consistent with the Molex documentation.
  • I do not see an obvious count, pitch, or mounting-pad mismatch that would immediately cause a manufacturing failure.
  • The one item I would still treat as must-verify is the pin 1 / contact-row orientation against the official drawing image, because that is the classic failure mode for bottom-contact FFC connectors.
If you want, I can continue with a stricter follow-up pass focused only on the pin-1 orientation and footprint mirroring risk.
11 days

Ready.




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5051102091

5051102091 thumbnail
Easy-On FFC/FPC Connector 0.50mm Pitch, FD19 Series, Right-Angle, Bottom Contact, 1.90mm Height, 20 Circuits, Gold over Nickel Plating #CommonPartsLibrary #Connector #Easy-On FD19 505110

Properties

5051102091

Molex

Connectors

J

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5051102091

5051102091

5051102091.stp3D Model
5051102091

5051102091

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kicad_mod

5051102091

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