规格型号HC-49US（3.5mm）HC-49US（2.5mm）HC-49US/3  HC-49US/SMD  HC-49US(2.5)/SMD频率范围3.579-40MHZ20-40MHZ24-70MHZ振动模式AT FundamentalBT Fundamental3rd Overtone谐振电阻150-2540Max100-60常温频差±10PPM～±50PPM静电容7pF Max温度频差See table负载电容6～50pF or Series绝缘电阻＞500MΩ/DC/100V±10V激励功率0.01mW-1mW老化率±3PPM～5PPM/year