component

ECS-250-20-4X-F-DN

Public Made by Adom

by adom

ECS Crystals, HC-49S. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

componentcrystal oscillator-oscillator-resonatorecs-250-20-4x-f-dnfactory-2.0.0extractor-text

Changed since verified ECS-250-20-4X-F-DN

by Ray · last 30 Oct 2026 · 1 record · files changed since
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier lcsc, 2 pinschanged since
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ECS-250-20-4X-F-DN · HC-49S · 2 pins
  • ✓copper: 2 copper pads, none touching another net
  • ✓datasheet: unpolarised two-terminal part: pins 1 and 2 by library convention, no names to check
  • ✓distributor: lcsc C2636470, digikey XC1917-ND, mouser 520-250-20-4X-F-DN
  • ✓family: Crystal_HC49-4H_Vertical
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-uqd1gyjw/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 2 pins = 2 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 2 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files! ecs-250-20-4x-f-dn.kicad_sym✓ ecs-250-20-4x-f-dn.kicad_mod✓ ecs-250-20-4x-f-dn.step
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Made with kicad-footprint-generator 10.0 · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray
viewers ecs-250-20-4x-f-dn: symbol repaired (crystal) · Ray
ecs-250-20-4x-f-dn-etched.glb Publish 0.1.0 · Ray
ecs-250-20-4x-f-dn-etched.step ecs-250-20-4x-f-dn: factory component page (tier=lcsc) · Ray
ecs-250-20-4x-f-dn-hero.glb ecs-250-20-4x-f-dn: hero GLB from the etched model (keeps the MPN mark) · Ray
ecs-250-20-4x-f-dn-hero.overlay.json Publish 0.1.0 · Ray
ecs-250-20-4x-f-dn.glb Publish 0.1.0 · Ray
ecs-250-20-4x-f-dn.kicad_mod Publish 0.1.0 · Ray
ecs-250-20-4x-f-dn.kicad_sym ecs-250-20-4x-f-dn: symbol repaired (crystal) · Ray
ecs-250-20-4x-f-dn.lbr ecs-250-20-4x-f-dn: symbol repaired (crystal) · Ray
ecs-250-20-4x-f-dn.step Publish 0.1.0 · Ray
package.json Publish 0.1.0 · Ray
page.json Set visibility: public · Ray
README.md Publish 0.1.0 · Ray
verification.json Verified: Published by the parts factory: tier lcsc, 2 pins · Ray

ECS-250-20-4X-F-DN

ECS · Crystals · HC-49S

ECS-250-20-4X-F-DN from ECS, in a HC-49S. 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 Terminal 1 of a two-terminal crystal; either orientation.
2 2 passive Terminal 2 of a two-terminal crystal; either orientation.

Key specifications

Parameter Value
Manufacturer ECS
Package HC-49S
Category Crystal Oscillator/Oscillator/Resonator
Pins 2

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Frequency tolerance -30 30 ppm @ +25°C 1
Frequency stability (option D) -100 100 ppm D = ±100 ppm; temp range N (-40 ~ +85°C) 1
Equivalent series resistance ESR 30 Ω 20.000 ~ 30.000 MHz, Fundamental 1
Shunt capacitance Co 7 pF 1
Drive level DL 500 μW 1
Aging (first year) -5 5 ppm @ +25°C ±3°C 1
Operating temperature Topr -40 85 °C Option N 1
Storage temperature Tstg -55 125 °C 1
Peak solder temperature 260 °C 10 sec max, 2 cycles max 2
Frequency Fo 25 MHz 250 = 25.000 MHz per P/N guide (range 3.570 to 70.000) 1
Load capacitance CL 20 pF 20 = 20 pF per P/N 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
contacts tin MSL 1, Lead Finish Sn/Cu Matte HC-49USX 2

CAD (KiCad official)

  • Symbol: ECS-250-20-4X-F-DN
  • Footprint: Crystal:Crystal_HC49-4H_Vertical
  • 3D model: HC-49S (KiCad packages3D, STEP)
  • 3D model files: ecs-250-20-4x-f-dn-etched.step / ecs-250-20-4x-f-dn-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ecs-250-20-4x-f-dn.step / ecs-250-20-4x-f-dn.glb are the bare package body.

Provenance

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

  • Datasheet: ECS datasheet (2 pp, sha256 ``, retrieved 2026-10-30, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary crystal 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