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HC49U series crystals with 3 leads (often designated as
HC-49/3U or similar) are AT-cut through-hole quartz crystals designed for applications requiring a grounded case, or specialized oscillator circuits where a center-tapped ground lead is necessary for reducing EMI or enhancing stability. Key Characteristics and Features:
- 3-Lead Configuration: These feature the standard two crystal pins plus a third center lead connected directly to the metal casing for grounding, often helping with noise reduction.
- Dimensions: Typically, the package is a tall HC-49/U type, measuring approximately 11.5 mm x 4.65 mm.
- Frequency Range: Fundamental, 3rd, 5th, or 7th overtone modes, covering a broad spectrum (e.g., 1.8 MHz to 100 MHz).
- Performance: Known for high precision, low Equivalent Series Resistance (ESR) (often ~50 Ohm, though 1.8432 MHz can be up to 800 Ohm), and stability, with options ranging from $\pm$5 ppm to $\pm$100 ppm.
- Applications: Often used in computer peripherals, microcontrollers, and RF equipment.
Available 3-Lead Options:
- Abracon: ABLSG-3-Lead series (e.g., 24.000MHz).
- MtronPTI: HC-49U/N series.
- Fox Electronics: Available in various frequencies (e.g., 15.36 MHz, 16.000 MHz).
- Generic/OEM: 13.46mm height, 3-pin HC-49U.
Common Specifications:
- Tolerance/Stability: Commonly $\pm$20 ppm, $\pm$30 ppm, or $\pm$50 ppm.
- Load Capacitance: Usually 18 pF or 20 pF.
- Temperature Range: Often -40°C to +85°C.
These components are available from major distributors like DigiKey, Mouser, and specialty suppliers.
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FOX 15.36MHz Crystal HC49U * 3 LEADS * ** NEW ** Qty. ...
eBay
https://www.ebay.com › ... › Crystals & Oscillators
eBay
https://www.ebay.com › ... › Crystals & Oscillators
FOX 15.36MHz Crystal HC49U * 3 LEADS * ** NEW ** Qty.10 ; Condition. New – Open box ; Condition Description. “NEW & UNUSED FROM MFG PKG” ; Quantity. 24 sold. More ...Read more
$4.99In stock$5.99 delivery30-day returns
3-4MHz HC49U (Tall) Crystals
3rd Planet Solar / KC9ON
https://kc9on.com › Crystals
3rd Planet Solar / KC9ON
https://kc9on.com › Crystals
These have a higher power rating, lower ESR, and typically VXO bend farther compared to our HC49S (short) crystals.
Missing: leads( 3Pin)
HC49U Series Crystals
Mouser Electronics, Inc.
https://www.mouser.com › passive-components › crystals
Mouser Electronics, Inc.
https://www.mouser.com › passive-components › crystals
HC49U Series Crystals are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for HC49U Series Crystals.
Quartz Crystal in HC-49/U standard height thru hole package ...
zhejiang a-crystal electronic technology co.,ltd.
https://www.acrystals.com › quartz-crystal-in-hc-49u-st...
zhejiang a-crystal electronic technology co.,ltd.
https://www.acrystals.com › quartz-crystal-in-hc-49u-st...
Quartz Crystal in HC-49/U standard height thru hole package with 3 leads(3Pin) ... Pin Through Quartz Crystal HC-49U-3L. Features High precision availability ...
RS PRO 1441031 Crystal HC49U 3.579545MHz 18pF 50ppm ...
RS – Industrial Solutions & Electronic Components
https://us.rs-online.com › product › rs-pro
RS – Industrial Solutions & Electronic Components
https://us.rs-online.com › product › rs-pro
RS PRO 1441031 Crystal HC49U 3.579545MHz 18pF 50ppm 180 Ohms Through Hole -20 to +70C. MFR Part #: 1441031. |. RS Stock Number: 71174212.
OEM/ODM HC-49U Radial 13.46mm Height Crystal ...
zhejiang a-crystal electronic technology co.,ltd.
https://www.acrystals.com › hc-49u-radial-1346mm-hei...
zhejiang a-crystal electronic technology co.,ltd.
https://www.acrystals.com › hc-49u-radial-1346mm-hei...
Customized HC-49U Radial 13.46mm Height Crystal HC-49U Package With 3 Leads(3Pin) at factory price from Acrystals.com. We are best HC-49U Radial 13.46mm ...
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petermann-technik.com
https://www.petermann-technik.com › products › details
petermann-technik.com
https://www.petermann-technik.com › products › details
Available with bent leads and metal jacket. NUMBER OF LEADS. HC-49/U = 2 leads (standard) HC-49/3U = 3 leads (optional). ±5 ppm, ±10 ppm, ±15 ppm, ±20 ppm, ±30 ...Read more
HC-49/US - 3 Lead Crystals
DigiKey
https://www.digikey.com › ... › Crystals
DigiKey
https://www.digikey.com › ... › Crystals
Consisting of a piezoelectric crystal that mechanically vibrates at a known frequency, their use requires provision of an external oscillator circuit with ...Read more
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HC-49U - Best Quartz Crystal Resonator
ChipSun Technology Co.,Ltd.
https://www.chinachipsun.com › Product
ChipSun Technology Co.,Ltd.
https://www.chinachipsun.com › Product
Frequency Range, 1.8～100MHz ; Operation Mode, （1.8 ~ 36MHz） Fundamental （27 ~ 100MHz）3rd Overtone ; Loading Capacitance, 20pF Std. 8 to 33pF, Series available.Read more
“HC-49/U, -49/T, -50/U” series Thru-Hole Crystals “H49MJ, ...
Component Distributors, Inc.
https://www.cdiweb.com › datasheets › mec
Component Distributors, Inc.
https://www.cdiweb.com › datasheets › mec
PDF
They are physically interchangeable. • No solder or flux involved in the sealing process. Low aging. • HC-49/U is wire lead type and HC ...Read more
3 pages