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Quartz Crystals
Quartz Crystals

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These products are being constantly updated. Please contact Hy-Q for the latest information.

Quartz Through Hole Crystals - Overview
See our Surface Mount products here

QC49/U Quartz Crystal

The Hy-Q range of AT-cut through hole crystals covers a frequency spectrum from 1 MHz, to 200MHz, with units in resistance weld holders. The resistance weld range of holders includes all common international standard types. Resistance welding is now the preferred type of encapsulation, having in recent years replaced the solder seal technique by virtue of its greater reliability and efficiency in production. Figure1 shows the frequency range available for each overtone order within each group of holder styles.

Use the links in the following table to view or download the desired data sheet in PDF format.
To view the holder styles for each ESR group, use the link in the 'Group' column
Holder Frequency Range (MHz)

Holder
Group

Style (QCxx)

Fundamental

3rd
Overtone

5th
Overtone

7th
Overtone

9th
Overtone

A 35 39 61 62 63 69 8 - 30 25 - 90 60 - 150 125 - 175 175 - 200
B This group is allocated to cold weld products.
Please contact us if you have any requirements for these
C 38 68 16 - 30 40 - 90 70 - 150 125 - 175 n/a
D 41 44 45 46 8 - 30 25 - 90 60 - 150 125 - 175 175 - 200
E 49 50 53 55 56 59 3 - 30 18 - 90 60 - 150 125 - 175 175 - 200
F 48 51 1 - 30 15 - 90 60 - 150 125 - 175 175 - 200
G 52 54 57 4 - 30 18 - 90 60 - 150 125 - 175 175 - 200
 * Note: QC35, QC39 & QC69 is no longer available
 
If you would like all crystal data in a single PDF please use this link.

The size of the crystal enclosure determines the maximum size of the resonator that it can accommodate. This limits the lower end of the frequency range for each enclosure type. It may also limit the ruggedness, reproducibility and choice of equivalent circuit parameters.

ESR v. Frequency curves

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