Model 402 SMT Quartz Crystal Tusonix / CTS Electronic Components Model 402 Surface Mount Quartz Crystal is a cost-effective device used in a wide range of commercial applications. Model 402 Crystal features a standard 2.0mm x 1.6mm seam-weld package and fundamental crystal design. Tusonix / CTS Model 402 has a frequency range of 16MHz to 60MHz, frequency tolerance of ±20ppm standard, and a frequency stability of ±30ppm standard.