This document describes the electrical and mechanical specifications of the Quartz Crystal Unit HC-49/U-S model produced by Aker. The product has a frequency of 3.6864 MHz, operating temperature range of -40 to +85 º C, load capacitance of 18 pF, and equivalent series resistance of 200 ohms.
The AKER CA-3.6864-18-3050-X is a HC-49/U-S through‑hole quartz crystal unit designed for precise frequency control. It complies with RoHS and is lead‑free.
Key electrical parameters include a nominal frequency of 3.6864 MHz, load capacitance of 18 pF, and an ESR of up to 200 Ω. Mechanical dimensions are listed with maximum values such as 11.35 mm.
| Nominal Frequency | 3.6864 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) | 200 Ohms Max |
| Drive Level | 100 Typ - 500 Max µW |
| Solder Reflow Characteristics | +260 for 10 s Max °C |
| Maximum Dimension | 11.35 mm |
The nominal frequency is 3.6864 MHz.
It operates from –40 °C to +85 °C.
The load capacitance is specified as 18 pF.
The ESR must not exceed 200 Ω.