This document describes the properties of the Aker CA4-14.31818-18-3050-X Quartz Crystal Unit HC-49/U-S-SMD - 4 Pad product, including rated frequency, mode, frequency stability, operating temperature range, storage temperature range, aging rate, load capacitance, bypass capacitance, equivalent series resistance, drive level, and reflow characteristics.
The CA4-14.31818-18-3050-X is a quartz crystal unit in an HC-49/U-S-SMD 4‑pad package, intended for precise frequency applications. It offers a nominal frequency of 14.31818 MHz with tight tolerance and stability specifications.
The device complies with RoHS standards and is lead‑free. Electrical parameters such as load capacitance, ESR, and drive level are listed, along with mechanical dimensions and solder reflow characteristics for reliable assembly.
| Nominal Frequency | 14.31818 MHz |
|---|---|
| Frequency Tolerance at 25°C | +30 ppm |
| Frequency Stability over Temperature Range | +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) | 50 Ω Max |
| Drive Level | 100 µW Typ – 500 µW Max |
| Solder Reflow Characteristics | +260 °C for 10 s Max |
| Package | HC-49/U‑S‑SMD – 4 Pad |
The nominal frequency is 14.31818 MHz.
It operates from –40 °C to +85 °C (extended range).
Yes, it is RoHS compliant and listed as lead‑free.
The crystal is supplied in an HC‑49/U‑S‑SMD 4‑pad package.