Quartz Crystal Units HC-49US that are lead-free;  There are also applicable to devices with narrow specifications at low cost;  Excellent vibration resistance, shock resistance and environmental characteristics;  Can be automatically mounted, as units provided with taping are available by request.  Nominal frequency: 3.500~80.000MHz Mode of vibration: Fundament 3.5~30.0MHz,3rd Overtone 30.0~80.0MHz,20.0~40.0MHz Frequency tolerance: +/-20ppm,+/-30ppm,+/-50ppm Frequency stability: +/-20ppm,+/-30ppm,+/-50ppm Load capacitance: 8pf~33pf,series Shunt capacitance: 7.0pf max Drive level: 0.01~2.0mw max Insulation resistance: 500 Min/100+/-15VDC Operating temperature : A)-10~+60 B)-20~+70 C)-30~+80 D)-40~+85 Aging: