component
HCM494000000ABJT
Public Made by Adomby adom
CITIZEN Crystals, HC-49S-SMD. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownHCM494000000ABJT
CITIZEN · Crystals · HC-49S-SMD
HCM494000000ABJT from CITIZEN, in a HC-49S-SMD. 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 | CITIZEN |
| Package | HC-49S-SMD |
| Category | Crystals, Oscillators, Resonators |
| 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 range f0 | f0 | 3.5 | 50 | MHz | 3.5 MHz to 30.0 MHz fundamental; 30.0 MHz to 50.0 MHz 3rd overtone | 1 | |
| Frequency tolerance at 25°C | Δf/f0 | -30 | 30 | ppm | at 25℃, suffix A (STD) | 1 | |
| Frequency tolerance over operating temperature range | Δf/f0 | -50 | 50 | ppm | below 6.0 MHz, -10℃ to +60℃ | 1 | |
| Aging (first year) | Δf/f | -5 | 5 | ppm | 25℃±3℃, first year | 1 | |
| Insulation resistance | IR | 500 | MΩ | DC100V±15V | 1 | ||
| Shunt capacitance | C0 | 7 | pF | 1 | |||
| Level of drive | DL | 100 | μW | 1 | |||
| Operating temperature range | OPR | -40 | 85 | ℃ | 1 | ||
| Storage temperature range | STR | -55 | 125 | ℃ | 1 | ||
| Load capacitance (fundamental) | CL | 10 | pF | Fundamental mode, upper limit ∞ | 1 | ||
| Nominal frequency | f0 | 4 | MHz | MPN frequency digits 4000000 (Hz) | 2 | ||
| Load capacitance (ordering suffix J) | CL | 18 | pF | ordering suffix J | 2 |
CAD (KiCad official)
- Symbol:
HCM494000000ABJT - Footprint:
Crystal:Crystal_SMD_HC49-SD - 3D model: HC-49S-SMD (KiCad packages3D, STEP)
- 3D model files:
hcm494000000abjt-etched.step/hcm494000000abjt-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);hcm494000000abjt.step/hcm494000000abjt.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: CITIZEN datasheet (2 pp, sha256 ``, retrieved 2026-10-15, tier: lcsc)
- Extractor: parts-factory
2.0.0/extract_pins, primarycrystal numbering(convention), consensusoff(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).