This document describes the electrical and mechanical specifications of the CA-3.579545-18-3050-X Quartz Crystal Unit produced by AKER. The product is a through-hole quartz crystal unit with a nominal frequency of 3.579545 MHz and a frequency tolerance of ±30 PPM. It is suitable for operating temperatures ranging from -40 to +85°C and is RoHS compliant. Additionally, it has a load capacitance of 18 pF and a maximum equivalent series resistance of 200 ohms.
The HC-49/U-S is a through‑hole quartz crystal unit designed for precise frequency control in electronic circuits. It complies with RoHS and is lead‑free, making it suitable for environmentally conscious designs.
Key specifications include a nominal frequency of 3.579545 MHz, a load capacitance of 18 pF, ESR up to 200 Ω, and operating temperature from –40 °C to +85 °C. Mechanical dimensions are limited to a maximum height of 11.35 mm and length of 10.05 mm, and the part can withstand solder reflow up to 260 °C for 10 seconds.
| Nominal Frequency | 3.579545 MHz |
|---|---|
| Frequency Tolerance (25 °C) | +30 ppm |
| Frequency Stability (Temp. Range) | +50 ppm Max |
| Operating Temperature Range | -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) | 200 Ω Max |
| Drive Level | 100 µW Typ – 500 µW Max |
| Solder Reflow Characteristics | +260 °C for 10 s Max |
| Maximum Height | 11.35 mm |
| Maximum Length | 10.05 mm |
The nominal frequency is 3.579545 MHz.
It requires a load capacitance of 18 pF.
The ESR is specified as up to 200 Ω.
It operates from –40 °C to +85 °C (extended range).