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ECS-50-20-4X

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.

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ECS-50-20-4X

ECS · Crystals · HC-49S

ECS-50-20-4X 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 @ +25°C -30 30 ppm @ +25°C 1
Frequency Stability (Operating Temperature Range) -50 50 ppm -10 ~ +70°C 1
Aging (First Year) -5 5 ppm @ +25°C ±3°C 1
Operating Temperature Topr -10 70 °C 1
Storage Temperature Tstg -55 125 °C 1
Shunt Capacitance Co 7 pF 1
Drive Level DL 500 μW 1
ESR (Equivalent Series Resistance) ESR 120 Ω 5.000 ~ 5.999 MHz, Fundamental mode 1
Load Capacitance CL 20 pF Specify in P/N (20 = 20 pF) 1
Frequency (nominal, developed frequency 050) Fo 5 MHz 2

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-50-20-4X
  • Footprint: Crystal:Crystal_HC49-4H_Vertical
  • 3D model: HC-49S (KiCad packages3D, STEP)
  • 3D model files: ecs-50-20-4x-etched.step / ecs-50-20-4x-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ecs-50-20-4x.step / ecs-50-20-4x.glb are the bare package body.

Provenance

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

  • Datasheet: ECS datasheet (2 pp, sha256 ``, retrieved 2026-10-29, 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