This document provides the electrical and mechanical specifications of the C-24.576-18-3050-X HC-49/U-Through Hole Quartz Crystal Unit produced by AKER. It is a fundamental mode oscillator with a frequency of 24.576 MHz and a frequency tolerance of ±30 PPM. It has a temperature stability of ±50 PPM over a temperature range of -40 to +85º C. The load capacitance is 18 pF and the equivalent series resistance is 40 ohms. The product is RoHS compliant and lead-free. Additionally, the document provides solder reflow characteristics and other relevant information.
The AKER HC-49/U quartz crystal unit is a through‑hole component designed for a nominal frequency of 24.576 MHz. It operates with an 18 pF load capacitance and offers a frequency tolerance of +30 ppm at 25 °C.
The device complies with RoHS standards, is lead‑free, and can withstand solder reflow up to 260 °C for 10 seconds. Mechanical dimensions are specified in millimeters, with a maximum length of 4.56 mm, width of 11.05 mm, and height of 10.15 mm.
| 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 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 |
| Length (max) | 4.56 mm |
| Width (max) | 11.05 mm |
The nominal frequency is 24.576 MHz.
It requires an 18 pF load capacitance.
Yes, it is RoHS compliant and lead‑free.