Part Data Review and Verification

Thought for 2 mins 23 sec

Part audit: Molex 5051102091 1) Available part information

Table

Field	Value
Manufacturer	Molex
MPN	5051102091
Part type	Connector
Project description	Easy-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 prefix	J
Schematic symbol contents	20 signal terminals + 2 fitting-nail terminals
Footprint contents	20 signal pads + 2 mounting/fitting-nail pads
3D model asset	5051102091.stp
Footprint asset	5051102091.kicad_mod

2) Datasheet URL check

The part already has an official Molex datasheet URL set in project properties:

Datasheet

Because a valid official URL is already present, no web lookup or replacement was needed.

3) Datasheet metadata summary Overview

Table

Item	Datasheet value
Series	FD19 / 505110
Connector type	Easy-On FFC/FPC connector
Circuits	20
Pitch	0.50 mm
Orientation	Right-angle
Contact position	Bottom contact
Mated height	1.90 mm
Packaging	Embossed package
Compliance/features	RoHS, halogen free, locking actuator

Electrical characteristics

Table

Parameter	Datasheet value
Current rating	0.5 A
Voltage rating	50 V
Contact resistance	40 mΩ max
Insulation resistance	100 MΩ min
Dielectric withstanding voltage	250 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

Table

Parameter	Datasheet value
Operating temperature	-40 C to +105 C
Applicable FPC/FFC thickness	0.30 mm +0.04 / -0.03
Also seen in series drawing	0.30 mm +0.04 / -0.03 to 0.35 mm +0.04 / -0.03
Recommended base film thickness	25 um
Recommended conductor thickness	35 um or 50 um
Mating cycles	20 cycles

Materials and plating

Table

Item	Datasheet value
Housing	LCP, glass filled, UL94V-0, beige
Actuator	PA, glass filled, UL94V-0, black
Terminal material	Phosphor bronze
Fitting nail material	Phosphor bronze
Contact area plating	Gold, 0.05 um minimum
Solder tail plating	Gold
Terminal underplate	Nickel, 1.0 um minimum
Fitting nail plating	Tin, 1.0 um minimum
Fitting nail underplate	Nickel, 1.0 um minimum

Pin / terminal description

Table

Item	Datasheet finding
Signal contacts	20 signal contacts
Mechanical tabs	2 fitting nails / mounting pads
Numbering	Single row of 20 contacts plus 2 fitting nails
Pin 1 orientation	Not 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

Category	Datasheet value
Recommended PCB layout A	10.5 mm
Recommended PCB layout B	13.1 mm
Recommended PCB layout C	9.5 mm
Recommended PCB layout D	14.7 mm
Embossed package A	10.9 mm
Embossed package B	14.9 mm
Embossed package C	16 mm
Pitch	0.50 ±0.05 mm

4) Symbol and footprint cross-check Cross-check results

Table

Check	Result	Notes
Contact count	Pass	Symbol and footprint both represent 20 contacts.
Fitting nails / mounting pads	Pass	Symbol includes 2 fitting-nail terminals and footprint includes 2 larger pads.
Pitch consistency	Pass	Footprint uses 0.50 mm contact spacing, matching the datasheet.
Bottom-contact / right-angle type	Pass	Project metadata matches datasheet description.
Height / product family	Pass	Project description matches the Molex part overview.
Footprint pad topology	Pass	Single fine-pitch signal row plus two larger mechanical pads is consistent with the datasheet.
Pin numbering orientation	Needs manual visual check	I could not conclusively verify pin 1 left/right orientation from machine-extracted drawing text alone. This is the main residual risk.
Plating metadata wording	Minor metadata mismatch	Project 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.

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Project Name

5051102091

Description

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

Manufac… Number

5051102091

Manufac…er Name

Molex

Part Type

Connectors

Datasheet URL

molex.com/en-us/products/part-detail-pdf/5051102091?display=pdf

Designator Prefix

License

creativecommons.org/licenses/by/4.0/

Pricing & Availability

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Controls

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