Series / description: USL Series, 0.4 mm pitch micro-coaxial cable connector, PCB-side receptacle, right-angle type
Part number: USL00-30L-A
Number of signal contacts: 30
Pitch: 0.4 mm
Mounting: Surface mount, right angle
Packaging suffix A: 500 pcs/reel, embossed tape
Mated height: 1.0 mm
Mating width: 5.6 mm
Applicable cable: #42 AWG micro coaxial cable
Rated current: 0.25 A/contact
Contact resistance: 100 mΩ max
Dielectric withstand voltage: 200 VAC for 1 minute
Insulation resistance: 100 MΩ min at 250 VDC
Operating temperature: -40°C to +85°C
Insulator: Glass-filled LCP, UL94V-0, black
Contact material/plating: Copper alloy, gold over nickel
Shell material/plating: Copper alloy, tin-copper over nickel
Mechanical / land-pattern data extracted
For USL00-30L-□:
Table
Parameter
Value
A
16.6 mm
B
14.1 mm
C
11.6 mm
D
9.6 mm
E
1.0 mm
F
16.8 mm
Recommended land pattern notes:
Signal pad pitch: 0.4 ± 0.03 mm
Signal pad width: 0.2 ± 0.03 mm
Signal pad span C: 11.6 ± 0.05 mm
Overall land-pattern span F: 16.8 ± 0.1 mm
Ground/common area span D: 9.6 ± 0.1 mm
Ground/common area dimension E: 1.0 ± 0.05 mm
Ground terminal pitch: 1.6 ± 0.1 mm
Datasheet note: hatched shell open area should have no copper pattern; ground mounting is recommended.
Schematic symbol review
Observed symbol terminals:
Signal-style numbered terminals: 1 through 37
Mechanical/mount terminals: MP1, MP2
Total schematic terminals/pads: 39
All terminal components have Pin Type: Unspecified
No terminal-specific Pin Description properties are populated.
Symbol mismatches / concerns
Datasheet contact count is 30, but the Flux symbol exposes numbered terminals 1–37 plus MP1/MP2.
This may be intentional if terminals 31–37 represent shell/ground tabs from the land pattern, but the current symbol does not label them that way.
If the part is meant to expose only electrical signal contacts, pins 31–37 are likely extra.
If pins 31–37 are shell/ground terminals, they should be described explicitly as shell/ground/mounting contacts and separated from the 30 signal contacts.
Pin descriptions are missing.
All 39 terminals are currently Unspecified and have no functional description.
Recommended cleanup: describe pins 1–30 as signal/contact pins and describe MP1/MP2 and any shell/ground pads according to the KEL drawing.
Pin grouping/sections are not defined beyond generic Terminal components.
Recommended grouping: Contacts for 1–30, Shell/Ground for shell ground lands if applicable, and Mechanical for MP1/MP2.
Footprint review
Observed footprint/layout data:
Layout node count includes 37 numbered pads + MP1 + MP2 = 39 pads, plus footprint containers and silk/fab geometry.
Silk/fab outline spans approximately 16.6 mm wide in the visible outline, matching the datasheet body dimension A = 16.6 mm.
Outer visible silk/fab span is approximately 19.6 mm wide, plausibly covering the full mechanical/keepout envelope beyond the connector body.
The footprint includes a pin-1 style marker near the left side.
Footprint mismatches / concerns
The available layout inspection did not expose individual pad dimensions/coordinates in detail, so I could not fully verify the 0.4 mm pitch, 0.2 mm pad width, C/D/E/F land-pattern dimensions, or no-copper shell keepout from tool-visible data.
The pad count concern mirrors the symbol concern: 39 footprint pads vs 30 datasheet signal contacts. This may be correct only if the extra 7 numbered pads are shell/ground lands plus 2 mechanical pads.
No project assets were listed as footprint assets, but the default footprint exists in the layout tree.
Library availability
A Flux library search did not find an exact library match for KEL USL00-30L-A. Similar 30-position 0.4 mm board-to-board connectors were found, but they are not substitutes for this micro-coax receptacle footprint.
Recommended fixes
Confirm from KEL drawing P39387 whether numbered pads 31–37 are shell/ground terminals.
If yes, update pin descriptions/types:
Pins 1–30: signal contacts / micro-coax contacts
Pins 31–37: shell/ground terminals, if confirmed
MP1/MP2: mechanical mounting/ground shell pads, if applicable
If no, remove or renumber extra terminals so the symbol exposes only the 30 contacts plus documented mechanical/shell pads.
Verify footprint pad geometry directly against the official KEL drawing: pitch 0.4 mm, pad width 0.2 mm, C = 11.6 mm, F = 16.8 mm, and no-copper keepout in the hatched shell open area.
Consider updating the Datasheet URL to the official KEL catalog or drawing URL for long-term stability, even though the property was already populated and was therefore left unchanged in this pass.