SXMH4.000F2020F30

Crystals Overview

The SXMH4.000F2020F30 is a passive quartz crystal manufactured by Shenzhen SCTF Electronics, designed for surface-mount applications using the HC-49SMD package. It operates at a fundamental frequency of 4 MHz with a load capacitance of 20 pF and an equivalent series resistance of 100 Ohms. The component maintains a frequency tolerance of ±20 ppm and functions reliably within a temperature range of -40°C to +85°C. It adheres to RoHS standards, ensuring compliance with environmental regulations while providing high stability and cost-effectiveness for electronic circuit timing requirements.

Crystals Feature Summary

• Utilizes sealed quartz construction with SMD and through-hole compatible sealing methods for enhanced reliability.
• Delivers high stability and wide temperature range performance suitable for demanding environments.
• Manufactured without lead, fully complying with RoHS environmental standards.

Crystals Applications

• Timing reference for microcontroller circuits
• Clock generation in consumer electronics
• Communication device synchronization

Crystals Procurement Notes

Verify the specific manufacturer designation as Shenzhen SCTF Electronics or Starcom Time Frequency when sourcing components. Confirm that the HC-49SMD package matches the required footprint for PCB layout. Ensure the load capacitance specification aligns with the oscillator circuit design parameters. Check for RoHS compliance documentation if environmental regulations are strictly enforced in the target market.

Crystals Selection Notes

Select this component when a 4 MHz fundamental frequency is required for surface-mount designs. The 20 pF load capacitance must match the external capacitors used in the oscillator circuit to ensure accurate frequency operation. Consider the ±20 ppm tolerance for applications requiring moderate precision. The HC-49SMD package offers a compact solution compared to larger through-hole variants while maintaining similar electrical characteristics.

Crystals Part Context

This part belongs to the SXMH series of passive crystals from SCTF, which includes various frequencies such as 12 MHz, 16 MHz, and 20 MHz. These components share common features like high reliability, low cost, and RoHS compliance. The series utilizes standard quartz resonator technology packaged in HC-49SMD form factors, providing a versatile option for general-purpose timing applications across different electronic products.

Crystals Replacement Considerations

Direct substitutes may include other 4 MHz HC-49SMD crystals with matching 20 pF load capacitance and ±20 ppm tolerance. Verify that alternative parts support the same operating temperature range of -40°C to +85°C. Ensure the ESR remains within acceptable limits for the specific oscillator circuit design before implementing any cross-brand replacements.