The Raltron AS-4.000-18-EXT-SMD-TR is a high-quality 4 MHz crystal designed for surface mount technology (SMD) applications. This crystal provides a stable and accurate frequency source for a wide range of electronic devices. Its compact size and robust construction make it suitable for demanding environments. Supreme Components International is an authorised distributor of Raltron, ensuring you receive genuine components with full traceability. This crystal is commonly used in microcontrollers, communication devices, and other applications requiring precise timing. The SMD package allows for automated assembly, reducing manufacturing costs and improving reliability. Key features include excellent frequency stability, low aging, and wide operating temperature range. Choose the AS-4.000-18-EXT-SMD-TR for reliable performance in your next project.