This document is about the CA4-27.000-18-3050-X Quartz Crystal Unit HC-49/U-S-SMD - 4 Pad product specification, which mainly introduces the product's frequency, frequency stability, operating temperature range, storage temperature range, aging, load capacitance, parallel capacitance, equivalent series resistance, and drive level parameters.
The AKER CA4-27.000-18-3050-X is a HC‑49/U‑S‑SMD quartz crystal unit designed for precise frequency control in electronic circuits. It complies with RoHS requirements and is supplied in a 4‑pad SMD package.
Key electrical parameters include a nominal frequency of 27 MHz, a load capacitance of 18 pF, and an ESR of up to 40 Ω. Mechanical specifications list the package dimensions in millimeters and the recommended solder reflow profile.
| Nominal Frequency | 27.000 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 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 27.000 MHz.
It operates from –40 °C to +85 °C (extended range).
Yes, the crystal is RoHS compliant.