This document describes the specifications and characteristics of the Quartz Crystal Unit HC-49/U-S-SMD - 4 Pad product manufactured by Aker, including frequency range, temperature stability, load capacitance, etc.
The CA4-9.8304-18-3050-X is a HC‑49/U‑S‑SMD quartz crystal unit designed for precise frequency control in electronic circuits. It complies with RoHS requirements and is lead‑free.
Key electrical specifications include a nominal frequency of 9.8304 MHz, frequency tolerance of +30 ppm at 25 °C, and a stability of +50 ppm over temperature. Mechanical dimensions and temperature ranges are also listed, ensuring suitability for a variety of applications.
| Nominal Frequency | 9.8304 MHz |
|---|---|
| Frequency Tolerance (25 °C) | +30 ppm |
| Frequency Stability over Temperature | +50 ppm Max |
| Operating Temperature Range | -40 to +85 °C |
| Storage Temperature Range | -55 to +125 °C |
| 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 |
The nominal frequency is 9.8304 MHz.
It operates from –40 °C to +85 °C.
Yes, it is RoHS compliant and lead‑free.
The load capacitance is specified as 18 pF.