This is a product specification, which mainly introduces the product model, frequency, temperature range, capacitance, impedance and other characteristics.
The AKER CA4-4.000-18-3050-X is a quartz crystal unit designed for precise frequency control in electronic circuits. It features a nominal frequency of 4.000 MHz with tight tolerance and stability specifications.
The device complies with RoHS lead‑free requirements and includes detailed electrical and mechanical parameters such as load capacitance, ESR, drive level, and temperature operating ranges. It is supplied in an HC‑49/U‑S‑SMD package with four mounting pads.
| Nominal Frequency | 4.000 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) | 120 Ohms Max |
| Drive Level | 100 Typ - 500 Max µW |
| Solder Reflow Characteristics | +260 °C for 10 s Max |
The nominal frequency is 4.000 MHz.
It operates from –40 °C to +85 °C (extended range).
The load capacitance is 18 pF.