This document is the datasheet of Aker CA-24.576-18-3050-X quartz crystal unit, and its main parameters are frequency, oscillation mode, temperature stability, frequency tolerance, load capacitance, etc
The HC-49/U-S is a through‑hole quartz crystal unit offered by AKER. This handbook lists the key electrical and mechanical parameters needed for design and assembly, and confirms RoHS compliance.
Key specifications include a nominal frequency of 24.576 MHz, load capacitance of 18 pF, ESR up to 40 Ω, and an extended operating temperature range of –40 °C to +85 °C. Mechanical dimensions and solder reflow limits are also provided for manufacturing reference.
| Nominal Frequency | 24.576 MHz |
|---|---|
| Mode of Oscillation | Fundamental |
| Frequency Tolerance at 25°C | +30 ppm |
| Frequency Stability over Temperature Range | +50 ppm Max |
| Operating Temperature Range (Extended) | -40 °C to +85 °C |
| Storage Temperature Range | -55 °C to +125 °C |
| Aging per Year | +3 ppm Max |
| Load Capacitance | 18 pF |
| Shunt Capacitance (Maximum) | 7 pF |
| Equivalent Series Resistance (ESR) | 40 Ω Max |
| Drive Level | 100 µW Typ – 500 µW Max |
| Solder Reflow Characteristics | +260 °C for 10 s Max |
| Maximum Height (Mechanical) | 11.35 mm |
The nominal frequency is 24.576 MHz.
It operates from –40 °C up to +85 °C (extended range).
Yes, the unit is RoHS compliant and lead‑free.