ECS-40-20-4X CRYSTAL 4.0000MHZ 20PF T/H ECS-40-20-4X is a high-performance crystal component that operates at a frequency of 4MHz with a frequency stability of ±50PPM.Features equivalent series resistance (ESR) of 150 Ohms. Compact dimensions: length 11.35mm, width 4.65mm, and height 3.50mm. Supports a temperature range of -10°C~+70°C for reliable performance. Manufactured by ECS with compliance to ROHS standards. Packaged as BULK for convenience.