8.000MHZ HC49-4H/30/50/-40+85/18PF/ATF

Crystal, HC49, 8 MHz, 30 ppm, 50 ppm, 18 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: EUROQUARTZ
Product type: Crystals
Frequency Nom:8MHz; Crystal Case:Through Hole, 10.77mm x 4.34mm; Frequency Stability + / -:50ppm; Load Capacitance:18pF; Frequency Tolerance + / -:30ppm; Product Range:HC49 Series; Operating Tem
SVHC: No SVHC (23-Jan-2024)
No. of Pins: 2Pins
Frequency Nom: 8MHz
Product Range: HC49
Crystal Mounting: Through Hole
Load Capacitance: 18pF
Crystal Frequency: 8MHz
Crystal Case / Package: Through Hole, 10.77mm x 4.34mm
Frequency Stability + / -: 50ppm
Frequency Tolerance + / -: 30ppm
Operating Temperature Max: 85°C
Operating Temperature Min: -40°C

Delivery and price
Units per pack	500
Price	0.302 €
Current stock	10+
Lead time	30 days

Datasheet

**HC49-4H and HC49-4HL Crystals** 

## _EURO_ QUARTZ 

**Low-cost, industry-standard crystal unit AT-Cut strip crystal with hermetically sealed can Frequency range 1.0MHz to 70MHz Package height options available** 

## **DESCRIPTION** 

HC49-4H crystals share the same base outline as the industrystandard HC49 crystal. The crystal uses at AT-cut strip crystal with an hermetically sealed can. HC49-4H crystals provide a low cost source of system clock frequency. 

## **SPECIFICATION** 

|Frequency Range:|3.2MHz to 70.0MHz|
|---|---|
|Oscillation Mode||
|AT-Cut Fundamental:|3.2MHz to 30.0MHz|
|BT-Cut Fundamental:|24.0MHz to 48.0MHz|
|AT-Cut 3rd Overtone:|27.0MHz to 70.0MHz|
|Calibration Tolerance at 25ºC||
|AT-Cut:|±30ppm (tolerance to ±10ppm|
||is available.)|
|BT-Cut:|±30ppm|
|Frequency Stability||
|AT-Cut:|±30ppm over -10° to +60°C|
||(Stability to ±10ppm is available)|
|BT-Cut:|±100ppm pver -10 to +60°C|
|Load Capacitance (CL):|Series or from 8pF to 32pF|
|Ageing at 25°C:|±3ppm maximum, 1st year,|
||±1ppm per year thereafter.|
|Drive Level:|100mWatts typ., 500mWatts max.|
|Storage Temperature Range:|-50° to +105°C|
|Crystal Holder:|Resistance-weld hermetic seal|
|RoHS Status:|Compliant|
|Supply format:|Bulk pack (Radial tape and reel|
||is available)|



## **ESR and OSCILLATION MODE** 

|**Frequency**|**Crystal Cut**|**ESR**|
|---|---|---|
|**Range MHz**|**Osc. Mode**|**Ohms Max.**|
|3.2 ~ 3.4|AT-Fund|300|
|3.5 ~ 6.0|AT-Fund|120|
|6.1 ~ 10.0|AT-Fund|60|
|10.1 ~ 30.0|AT-Fund|40|
|24.0 ~ 48.0|BT-Fund|40|
|27.0 ~ 30.0|AT-3rd OT|150|
|30.1 ~ 50.0|AT-3rd OT|100|
|50.1 ~ 70.0|AT-3rd OT|80|



## **PART NUMBER GENERATION** 

Part numbers for HC49-4H crystals are generated as follows: 

Example: 

## 8.000MHz  HC49-4H/30/50/-20+70/30pF/30R 

Frequency / holder /calibration tolerance /stability over op. temp. /op. temp. range / circuit condition /ESR or operating mode 

**EUROQUARTZ LIMITED  Blacknell Lane  CREWKERNE  Somerset  UK  TA18 7HE Tel: +44 (0)1460 230000  Fax: +44 (0)1460 230001    sales@euroquartz.co.uk     www.euroquartz.co.uk**

Updated at April 28, 2026

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