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A1257WR-S-4P

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CJT Changjiang Connectors Wire To Board Connector, SMD,P=1.25mm,卧贴. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

componentconnectorsa1257wr-s-4pfactory-2.0.0extractor-text

Verified A1257WR-S-4P

by Ray · last 6 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

6 Nov 2026RayPublished by the parts factory: tier lcsc, 4 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: A1257WR-S-4P · JST_GH_SM04B-GHS-TB_1x04-1MP_P1.25mm_Horizontal · 4 pins
  • ✓copper: 6 copper pads, none touching another net
  • ✓datasheet: all 4 pin names found in the 4-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: JST_GH_SM04B-GHS-TB_1x04-1MP_P1.25mm_Horizontal
  • ✓files: 6 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-2yo8gc0u/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 1 records
  • •package_fit (skip): a connector's drawing does not give a package outline's A, D and E (datasheet p.4)
  • ✓pads: 4 pins = 5 pads
  • ✓pose: 1 STEP(s) Z-up, seated, centred
  • ✓symbol: 4 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ a1257wr-s-4p.kicad_sym✓ a1257wr-s-4p.kicad_mod✓ a1257wr-s-4p.step
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Ray Publish 0.1.0 f7227fc 9h ago

A1257WR-S-4P

CJT Changjiang Connectors · Wire To Board Connector · JST_GH_SM04B-GHS-TB_1x04-1MP_P1.25mm_Horizontal

A1257WR-S-4P from CJT Changjiang Connectors, in a JST_GH_SM04B-GHS-TB_1x04-1MP_P1.25mm_Horizontal. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 1 passive Contact 1; numbering follows the footprint.
2 2 passive Contact 2; numbering follows the footprint.
3 3 passive Contact 3; numbering follows the footprint.
4 4 passive Contact 4; numbering follows the footprint.

Key specifications

Parameter Value
Manufacturer CJT Changjiang Connectors
Package JST_GH_SM04B-GHS-TB_1x04-1MP_P1.25mm_Horizontal
Category Connectors
Pins 4

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Current rating 1 A AC, DC 1
Voltage rating 50 V AC, DC 1
Contact resistance 30 m 1
Insulation resistance 100 M 1
Withstanding voltage 500 V AC 1 minute 1
Operating temperature range -40 105 °C 1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
housing Nylon Insulator:Nylon 9T,UL94V-0 3
contacts Brass tin *Material:Pin:Brass/Tin over Nickel 3

CAD (KiCad official)

  • Symbol: A1257WR-S-4P
  • Footprint: Connector_JST:JST_GH_SM04B-GHS-TB_1x04-1MP_P1.25mm_Horizontal
  • 3D model: JST_GH_SM04B-GHS-TB_1x04-1MP_P1.25mm_Horizontal (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: CJT Changjiang Connectors datasheet (4 pp, sha256 ``, retrieved 2026-11-06, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary connector numbering (convention), consensus off (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF