AS49SD-4M-FC160F3-TR CRYSTAL 4MHZ HC49SMT 16PF 20ppm SMD TR ANSEN AS49SD-4M-FC160F3-TR 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 100 Ohms. Compact dimensions: length 11.50mm, width 4.80mm, and height 4.20mm. Supports a temperature range of -20°C~+70°C for reliable performance. Manufactured by ANSEN with compliance to ROHS standards. Packaged as TAPE&REEL for convenience.