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ECS-40-20-1X
Crystal, HC-49UX Series, 4 MHz, 30 ppm, 50 ppm, 20 pF
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: ECS INC INTERNATIONAL
- Product type: Crystals
- SVHC: No SVHC (04-Feb-2026)
- Frequency Nom: 4MHz
- Product Range: HC-49UX Series
- Load Capacitance: 20pF
- Crystal Frequency: 4MHz
- Crystal Case / Package: Through Hole, 11.35mm x 4.65mm
- Frequency Stability + / -: 50ppm
- Frequency Tolerance + / -: 30ppm
- Operating Temperature Max: 70°C
- Operating Temperature Min: -10°C
| Delivery and price | |
|---|---|
| Units per pack | 500 |
| Price | 0.31 € |
| Current stock | 500+ |
| Lead time | 30 days |
## RoHS The HC-49UX is an “AT” cut resistance weld type Thru Hole quartz crystal. ## **HC-49UX QUARTZ CRYSTAL** ## **Request a Sample** ## **OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS** ## **HC-49UX QUARTZ CRYSTAL** |**PARAMETERS**|**CONDITIONS**|**HC-49UX**|**HC-49UX**|**HC-49UX**|**UNITS**| |---|---|---|---|---|---| |||**MIN**|**TYP**|**MAX**|| |Frequency<br>~~a~~|Fo<br>~~a~~|1.800<br>~~a~~|~~a~~|100.000<br>~~a~~|MHz<br>~~a~~| |Frequency Tolerance*<br>~~a~~<br>~~Le~~|@ +25°C<br>~~a~~<br>~~Gs~~|~~a~~|~~a~~|± 30<br>~~a~~|ppm<br>~~a~~| |FrequencyStability*<br>~~es~~<br>~~Le~~|-10 ~ +70°C<br>~~es~~<br>~~Gs~~|~~es~~|~~es~~|± 50<br>~~es~~|ppm<br>~~es~~| |Shunt Capacitance<br>~~Le~~<br>~~Le~~|Co<br>~~Gs~~<br>~~OO~~|~~OO~~|~~OO~~|7<br>~~OO~~|pF<br>~~OO~~| |Load Capacitance<br>~~Le~~<br>~~Le~~|Specify in P/N<br>~~Gs~~<br>~~OO~~|10<br>~~OO~~|20<br>~~OO~~|Series<br>~~OO~~|pF<br>~~OO~~| |Drive Level<br>~~Le ~~<br>~~a~~|DL<br> ~~OO~~|~~OO~~|~~OO~~|1.0<br>~~OO~~|mW<br>~~OO~~| |Operating Temperature*<br>~~a~~|Topr|-10||+70|°C| |Storage Temperature<br>~~a~~<br>~~le~~|Tstg|-55||+125|°C| |Aging (First Year)<br>~~le~~|@ +25°C ±3°C|||±5|ppm| - Cost Effective - Excellent Aging - “AT” Cut Crystal - Wide Frequency Range - PB Free/RoHS Compliant - MSL 1 |**Frequency (MHz) ESR Ω Max.**<br>|<br>~~s~~|**Frequency (MHz) ESR Ω Max.**<br>|<br>~~s~~|**Mode of Osc.**| |---|---|---| |1.800 ~ 1.999<br>~~e~~|750<br>~~e~~~~**e**~~<br>~~s~~|Fundamental<br>~~**e**~~| |2.000 ~ 2.399<br>~~ee~~|500<br>~~s~~<br>~~ee~~|Fundamental<br>~~ee~~| |2.400 ~ 2.999<br>~~ee~~|300<br>~~ee~~|Fundamental<br>~~ee~~| |3.000 ~ 3.199<br>~~ee~~<br>~~ee~~|200<br>~~ee~~<br>~~ee~~|Fundamental<br>~~ee~~<br>~~ee~~| |3.200 ~ 3.699<br>~~ee~~<br>~~ee~~|120<br>~~ee~~<br>~~ee~~|Fundamental<br>~~ee~~<br>~~ee~~| |3.700 ~ 4.199<br> ~~ee~~<br>~~ee~~|100<br>~~ee~~<br>~~ee~~|Fundamental<br>~~ee~~<br>~~ee~~| |4.200 ~ 4.899<br> ~~ee~~<br>~~ee~~<br>~~ee~~|70<br>~~ee~~<br>~~ee~~<br>~~Gs~~|Fundamental<br>~~ee~~<br>~~ee~~| |4.900 ~ 4.999<br>~~ee~~<br>~~ee~~|55<br>~~Gs~~<br>~~ee~~|Fundamental| |5.000 ~ 5.999<br>~~ee~~<br>~~ee~~<br>~~ee~~|50<br>~~Gs~~<br>~~ee~~<br>~~ee~~|Fundamental| |6.000 ~ 7.999<br>~~ee ~~<br>~~ee~~<br>~~ee~~|40<br> ~~ee~~<br>~~ee~~<br>~~ee~~|Fundamental| |8.000 ~ 9.999<br>~~ee ~~<br>~~ee~~<br>~~ee~~|35<br> ~~ee~~<br>~~ee~~<br>~~ee~~|Fundamental| |10.000 ~ 12.499<br>~~ee ~~<br>~~ee~~<br>~~ee~~|30<br> ~~ee~~<br>~~ee~~<br>~~ee~~|Fundamental| |12.500 ~ 15.999<br>~~ee ~~<br>~~ee~~|25<br> ~~ee~~<br>~~ee~~|Fundamental| |16.000 ~ 30.000<br>~~ee ~~|20<br> ~~ee~~|Fundamental| |30.000 ~ 100.000<br>~~ee~~|40<br>~~ee~~|3rdOvertone<br>~~ee~~| ## **DIMENSIONS (mm)** _**Figure 1)** Side and Bottom_ ## **PART NUMBERING GUIDE: Example ECS-200-20-1X** ||**ECS - FREQUENCY ABBREVIATION**|**ECS - FREQUENCY ABBREVIATION**|**ECS - FREQUENCY ABBREVIATION**|**ECS - FREQUENCY ABBREVIATION**|**ECS - FREQUENCY ABBREVIATION**||**LOAD**|||**PACKAGE**|**PACKAGE**|||**AVAILABLE OPTIONS**|**AVAILABLE OPTIONS**|**AVAILABLE OPTIONS**||**PACKAGING**|**PACKAGING**|**PACKAGING**|| |---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| ||||||||**CAPACITANCE**|||||Tolerance Stability Temp Range|||Tolerance Stability Temp Range|Tolerance Stability Temp Range|Tolerance Stability Temp Range|Tolerance Stability Temp Range|||| ||||||||||||||||||||||| ||ECS||200 = 20.000 MHz||||20 = 20 pF|||1X =||Blank = Std||Blank= Std||Blank= Std||||Bulk|| ||||See P/N Guide||||S = Series||HC-49UX|||A = ± 25ppm||D= ±100 ppm||L = -10 ~ +70°C|||||| |||||||||||||J = ± 20ppm||E = ± 50 ppm||M = -20 ~ +70°C|||||| |||||||||||||R = ± 15ppm||G = ± 30 ppm||Y = -30 ~ +85°C|||||| |||||||||||||C = ± 10ppm||H = ± 25 ppm||N = -40 ~ +85°C|||||| |* Specify available options in P/N.|* Specify available options in P/N.|||||||||||||T = ± 20 ppm †||P = -40 ~ +105°C|||||| |† Contact ECS for availability over extended temp range.|† Contact ECS for availability over extended temp range.||† Contact ECS for availability over extended temp range.||||† Contact ECS for availability over extended temp range.|||||||W = ±15 ppm †<br>K = ± 10 ppm †||S = -40 ~ +125°C<br>U = -55 ~ +125°C||||Rev.2017|| ## RoH S **HC-49UX QUARTZ CRYSTAL** COMPLIANT **SOLDER PROFILE** Peak solder Temp +260°C Max 10 sec Max. 2 Cycles Max. MSL 1, Lead Finish Sn/Cu Matte _**Figure 1)** Suggested Solder Profile_ **==> picture [160 x 575] intentionally omitted <==** **----- Start of picture text -----**<br> |||| |---|---|---| |DEVELOPED FREQUENCIES| |Abbreviation|Frequency|(MHZ)| |018|1.8432| |020|2.000| |020.48|2.048| |024|2.4576| |030|3.000| |032|3.2768| |035|3.579545| |036|3.6864| |039|3.93216| |040|4.000| |040.3|4.032| |041|4.096| |042|4.194304| |044|4.433618| |049|4.9152| |050|5.000| |051|5.0688| |060|6.000| |065|6.5536| |073|7.3728| |080|8.000| |092.1|9.216| |098.3|9.8304| |100|10.000| |110|11.000| |110.5|11.0592| |120|12.000| |122.8|12.288| |143|14.31818| |147.4|14.7456| |150|15.000| |160|16.000| |180|18.000| |184|18.432| |196.6|19.6608| |200|20.000| |221|22.1184| |240|24.000| |480|48.000| **----- End of picture text -----**<br>
Updated at June 5, 2026
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