This document is the specification of C-25.000-18-3050-X quartz crystal unit. The product conforms to RoHS standards, the working frequency is 25.000 MHz, the frequency stability is ±30 PPM, the temperature range is -40 to +85 º C, and the storage temperature range is -55 to +125. The annual aging is ±3 PPM.
This document provides the technical specifications for the AKER HC-49/U quartz crystal unit, a through‑hole component used in timing and frequency applications. It includes electrical performance data, mechanical dimensions, and compliance information.
Key electrical parameters include a nominal frequency of 25.000 MHz, a frequency tolerance of ±30 ppm at 25 °C, and a stability of +50 ppm max over temperature. Mechanical data give the maximum package dimensions and the marking details, while the sheet confirms RoHS compliance and lead‑free construction.
| Nominal Frequency | 25.000 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 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) | 40 Ω Max |
| Drive Level | 100 µW Typ – 500 µW Max |
| Solder Reflow Characteristics | +260 °C for 10 s Max |
The nominal frequency is 25.000 MHz.
It operates from –40 °C to +85 °C (extended range).
Yes, it is RoHS compliant and lead‑free.