QT325S-30.000MAHJ-T

Overview

The QST QT325S-30.000MAHJ-T is a surface-mount quartz crystal resonator operating at a fundamental frequency of 30 MHz. It features a frequency stability and tolerance of ±30 ppm at 25°C, with an equivalent series resistance (ESR) of 50 Ohms maximum. The component utilizes a load capacitance of 18 pF and is housed in a compact 4-SMD, no-lead package measuring 3.2 mm x 2.5 mm x 0.7 mm. Designed for base mode operation, it supports a functional temperature range from -40°C to +85°C and complies with RoHS3 standards.

Feature Summary

• Seam-sealed ceramic construction for environmental protection
• Surface-mount design compatible with automated assembly processes
• Fundamental mode oscillation for precise timing applications

Applications

• Microcontroller clock sources
• Communication module timing references
• Consumer electronics oscillator circuits

Procurement Notes

Verify the specific suffix 'MAHJ' against the manufacturer's current datasheet to confirm pin configuration and sealing type. Ensure the selected variant matches the required load capacitance and ESR specifications for the target circuit design. Confirm RoHS3 compliance status if restricted substances are mandated by the end-product regulations.

Selection Notes

Select this component when a 30 MHz fundamental frequency with ±30 ppm stability is required in a small 3.2x2.5 mm footprint. Consider the 50 Ohm ESR limit to ensure adequate drive level margins within the oscillator circuit. Verify that the -40°C to +85°C temperature range aligns with the operational environment requirements of the final application.

Part Context

This part belongs to the QT325S series of seam-sealed quartz crystals manufactured by QST. These components are designed as drop-in replacements for various standard crystal packages, offering improved reliability through hermetic sealing. The series provides options across multiple frequencies while maintaining consistent electrical characteristics and mechanical dimensions.

Replacement Considerations

Public confirmed substitute: QT325S-30.000MAHJ-T by TXC Corporation.