This is a 20.000 MHz quartz crystal unit for HC-49/U-Through Hole. Its main features include high frequency stability and wide operating temperature range, which can work within the range of -55 to +125 degrees Celsius.
The HC-49/U quartz crystal unit from Aker is a through‑hole component designed for precise frequency control in electronic circuits. It complies with RoHS and is lead‑free, suitable for a range of applications requiring stable oscillation.
Key electrical specifications include a nominal frequency of 20 MHz, a frequency tolerance of +30 ppm at 25 °C, and a stability of +50 ppm over temperature. Mechanical dimensions and marking details are provided, along with reflow and temperature limits for reliable soldering and operation.
| Nominal Frequency | 20.000 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) | 25 Ω Max |
| Drive Level | 100 µW Typ – 500 µW Max |
| Solder Reflow Characteristics | +260 °C for 10 s Max |
The nominal frequency is 20.000 MHz.
The crystal requires a load capacitance of 18 pF.
The extended operating temperature range is –40 °C to +85 °C.
Yes, it is RoHS compliant and lead‑free.