This document describes the specifications of CA-8.000-18-3050-X Quartz Crystal Unit HC-49/U-S, including frequency, capacitance, and impedance.
The CA-8.000-18-3050-X is a through‑hole quartz crystal unit designed for precise frequency control, operating at a nominal 8.000 MHz. It offers tight frequency tolerance (+30 ppm at 25 °C) and stability (+50 ppm over temperature), with low aging (+3 ppm per year) and a typical drive level of 100 µW to 500 µW.
The component complies with RoHS requirements and is rated for extended operating temperatures from –40 °C to +85 °C, with storage limits from –55 °C to +125 °C. Mechanical dimensions are limited to a maximum length of 11.35 mm and width of 4.65 mm, suitable for standard HC‑49/U‑S mounting.
| Nominal Frequency | 8.000 MHz |
|---|---|
| Frequency Tolerance (25 °C) | +30 ppm |
| Frequency Stability over Temperature | +50 ppm Max |
| Operating Temperature Range (Extended) | -40 to +85 °C |
| Storage Temperature Range | -55 to +125 °C |
| Aging per Year | +3 ppm Max |
| Load Capacitance | 18 pF |
| Shunt Capacitance (Maximum) | 7 pF |
| Equivalent Series Resistance (ESR) | 60 Ω Max |
| Drive Level | 100 µW Typ – 500 µW Max |
| Solder Reflow Characteristics | +260 °C for 10 s Max |
| Maximum Length | 11.35 mm |
| Maximum Width | 4.65 mm |
The nominal frequency is 8.000 MHz.
It operates from –40 °C to +85 °C (extended range).
Yes, the device is RoHS compliant.
The part number is CA-8.000-18-3050-X.