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I found the official CONNFLY DS1021 series PDFs and confirmed the project currently has no self-queryable datasheet URL, so I’m adding the official DS1021 PDF URL before the cross-check.
Created a project doc

Datasheet Cross-Check Report — DS1021-1X25SF11-B

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Date: 2026-07-07 Official CONNFLY DS1021 series datasheet: https://www.connfly.com/static/upload/file/pdf/DS1021.pdf

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Completed the review and added the official CONNFLY DS1021 datasheet URL to the part project. The full cross-check is in Datasheet Cross-Check Report.
Open items:
  • No serious footprint/symbol mismatch found.
  • Pin descriptions are incomplete (undefined pins / no per-pin descriptions).
  • Manufacturer name should be normalized from Connfly to CONNFLY or CONNFLY Elec.
  • Confirm stackup/layout setup because the layout summary reports copperLayers=0.
Suggested next steps:
  1. Normalize the Manufacturer Name property.
  2. Add pin descriptions for contacts 1–25.
  3. Re-check/publish the part after metadata cleanup.
Clean metadata and verify
Fix metadata issues
Run ERC/DRC
Check stackup issue
Prepare publish review
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Datasheet Cross-Check Report — DS1021-1X25SF11-B
Date: 2026-07-07
Sources Used
The official datasheet URL was added to the part project as Datasheet URL because the project did not have a self-queryable datasheet URL set.
Existing Part Information Reviewed

Table

FieldCurrent project/library value observed
Project / part nameDS1021-1X25SF11-B
Manufacturer Part NumberDS1021-1X25SF11-B
Manufacturer Name Connfly observed in project/library properties
Part TypeConnectors
Description25 position 2.54mm single row vertical pin header through hole
Designator PrefixJ
Published Part UID6b5e18cb-787a-465b-8289-b2121bc5ebfc
Symbol terminals25 terminal entries, pin numbers 1 through 25
FootprintCustom KiCad footprint asset CONNFLY_DS1021-1X25SF11-B.kicad_mod
3D modelDS1021-1X25SF11-B.step
Key Datasheet Specs

Table

ParameterDatasheet value
SeriesDS1021
Connector type2.54 mm pin header, V/T type
Ordering code breakdown1X25 = single row, 25 contacts; S = straight type; F1 = full gold flash; 1 = Table A/B dimension Type 1; B = plating level B
Contact count25
Row count1 row
Pitch2.54 mm nominal; drawing shows 2.54 ±0.1 mm
Mounting/orientationStraight, vertical, through-hole
Recommended PCB drill/holeØ1.02 mm in DS1021.pdf
Pin/contact size□0.64 mm square pin in DS1021.pdf
First-to-last pin span(N−1) × 2.54 = 60.96 mm for N=25
Overall body/insulator lengthN × 2.54 ±0.5 = 63.50 ±0.5 mm for N=25
Body width2.50 mm
Contact materialCopper alloy
Contact platingGold plating over nickel / full gold flash
InsulatorPBT, black, UL94-V0
Current rating3 A
Voltage rating250 V AC rms / official page lists 250 V AC/DC
Contact resistance20 mΩ max
Insulation resistance1000 MΩ min
Dielectric withstand600 V AC rms for 1 minute
Operating temperature−40 °C to +105 °C
Symbol Cross-Check

Table

CheckProject stateDatasheet expectationResult
Pin count25 terminal components25 contacts for 1X25Pass
Pin numberingPin Number properties cover 1 through 25Contacts numbered 1 through 25Pass
Pin electrical typePassiveConnector contacts are passivePass
Pin functions/descriptionsPins display as undefined; no per-pin Pin Description text observedDatasheet gives no unique signal functions; contacts are generic connector pinsAcceptable but incomplete metadata
Symbol styleParametric terminal-style symbol using separate terminal entriesNo unique functional symbol required for a 1×25 headerPass with note
Footprint Cross-Check
Footprint asset reviewed from embedded KiCad module CONNFLY_DS1021-1X25SF11-B.kicad_mod.

Table

CheckFootprint valueDatasheet expectationResult
Pad count25 through-hole pads25 contactsPass
Pad pitch2.54 mm from pad coordinates2.54 mmPass
First-to-last pad span−30.48 mm to +30.48 mm = 60.96 mm60.96 mm for 25 pinsPass
Drill diameter1.02 mmØ1.02 mmPass
Copper pad size1.53 mm × 1.53 mmDatasheet specifies hole, not copper pad diameterReasonable / no datasheet conflict
Pad 1 markerPad 1 rectangular plus silkscreen/fab marker near pin 1Pin 1 identification expectedPass
Body/silk length−31.75 mm to +31.75 mm = 63.50 mm63.50 ±0.5 mmPass
Body/silk width2.50 mm2.50 mmPass
Mount typeThrough-hole pads on both copper layersStraight through-holePass
Mismatches / Issues Flagged
  1. No serious symbol or footprint mismatch found against the official DS1021.pdf drawing. The pin count, 2.54 mm pitch, 60.96 mm pin span, 1.02 mm drill, and 63.50 mm body outline all match the datasheet-derived values for N=25.
  2. Pin descriptions are incomplete. The schematic terminal pins appear as undefined, and no Pin Description property was observed. Electrically this is low risk for a passive header, but metadata would be clearer if each pin were described as Connector contact 1 through Connector contact 25.
  3. Manufacturer name is not normalized. The project/library value appears as Connfly with a leading space and nonstandard capitalization. Recommended normalized value: CONNFLY or CONNFLY Elec.
  4. Datasheet source ambiguity noted. Search also found DS1021-16.pdf, which appears to describe an H=1.7 mm round-pin variant with Ø0.75 mm hole data. The exact project footprint matches DS1021.pdf, which explicitly extracts DS1021-1X25SF11-B with square 0.64 mm pins and Ø1.02 mm hole. Use DS1021.pdf as the controlling source for this part unless CONNFLY confirms the -16 drawing applies to this exact variant.
  5. Project layout summary reports copperLayers=0. This appears to be a layout setup/reporting issue rather than a footprint mismatch, because the footprint itself contains through-hole pads on *.Cu *.Mask. Confirm stackup if this part project will be used for manufacturing verification.
Recommendation
The component is usable as a DS1021-1X25SF11-B 25-position through-hole pin header. The only recommended cleanup items are metadata quality fixes: normalize Manufacturer Name and add human-readable pin descriptions for the 25 passive connector contacts.

  • Sources Used

  • Existing Part Information Reviewed

  • Key Datasheet Specs

  • Symbol Cross-Check

  • Footprint Cross-Check

  • Mismatches / Issues Flagged

  • Recommendation