Crystals 4MHz 20pF 30ppm -40/85
4MHz ±30ppm Crystal 20pF 100 Ohms HC-49/U
得捷: CRYSTAL 4.0000MHZ 20PF TH
艾睿: Crystal 4MHz ±30ppm Tol ±50ppm Stability 20pF FUND 100Ohm 2-Pin HC-49/U Thru-Hole Bulk
安富利: 4MHZ,20PF,-40/85
CTS 西迪斯