AS-4.000-20-3030-SMD-TR- CRYSTAL 4.000MHZ 20 Pf 30 PPM SMD NS AS-4.000-20-3030-SMD-TR- is a high-performance crystal component that operates at a frequency of 4MHz with a frequency stability of ±30PPM.Features equivalent series resistance (ESR) of 130 Ohms. Compact dimensions: length 13.50mm, width 4.70mm, and height 4.60mm. Supports a temperature range of -20°C~+70°C for reliable performance. Manufactured by RALTRON with compliance to ROHS standards. Packaged as TAPE&REEL for convenience.