AS49SD-6M-FE180F3 CRYSTAL 6MHZ HC49US 18pF 30ppm SMD AS49SD-6M-FE180F3 is a high-performance crystal component that operates at a frequency of 6MHz with a frequency stability of ±50PPM.Features equivalent series resistance (ESR) of 60 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.