This document describes the specifications and characteristics of a Quartz Crystal Unit HC-49/U-S-SMD - 4 Pad product, including frequency, temperature range, load capacitance, etc.
This document describes the AKER CA4-7.3728-18-3050-X quartz crystal unit, a HC-49/U-S-SMD 4‑pad component. It is RoHS compliant and lead‑free, suitable for a range of temperature environments.
The sheet lists detailed electrical parameters such as nominal frequency, tolerance, stability, load capacitance, ESR and drive level, as well as mechanical dimensions and solder reflow characteristics. Ordering information includes the part number and a Farnell order code.
| Nominal Frequency | 7.3728 MHz |
|---|---|
| Frequency Tolerance at 25°C | +30 |
| Frequency Stability over Temperature Range | +50 PPM Max |
| Operating Temperature Range (Extended) | -40 to +85 °C |
| Storage Temperature Range | -55 to +125 |
| Aging per Year | +3 PPM Max |
| Load Capacitance | 18 |
| Shunt Capacitance (Maximum) | 7 pF |
| Equivalent Series Resistance (ESR) | 80 Ohms Max |
| Drive Level | 100 Typ - 500 Max µW |
| Solder Reflow Characteristics | +260 for 10 s Max °C |
The nominal frequency is 7.3728 MHz.
Yes, the crystal is RoHS compliant and lead‑free.
The part number is CA4-7.3728-18-3050-X.