We are the largest manufacturers which specialise in producing Quarts Resonator such as HC-49U , HC-49S , 49S/SMD , SMD7050 , SMD6035 , SMD5032 , SMD4025 , SMD3225 etc and VCXO such as DIP8 , DIP14 etc.These items have been mainly applying for TV , automobile electronics , pc cards , electronical meter , DVD , MP3 , digital camera , military engineering and teleconmunication fields etc . Quality Management System ISO9001/2000 and Environment Management Certification System ISO14001/2004 has been implementing thoroghly and guarrantee that meet the EU standrads of Rosh with Pb free production. Quartz crystal resonator HC-49U Feature:Resistance weld ; Low power ; High stability ; Wide frequency range General Specification: Nominal frequency : 1.000-125.000MHZ Mode of vibration : Fundament 1.0-30.0MHZ ; 3rd Voertone 24.0-60.0MHZ ; 60.0-125.0MHZ Crt type : AT Frequency tolerance : ±20ppm , ±30ppm , ±50ppm Frequency stability : ±20ppm , ±30ppm , ±50ppm Load capacitance : 8pf-33pf Shunt capacitance : 7.0pf max Drive level : 0.01-2.0mw max Insulation resistance : 500M Ω Min/100 ± 15V DC Operating temperture : A)-10ºC--+60ºC B)-20ºC--+70ºC C)-30ºC--+80ºC D)-40ºC--+85ºC Aging : ≤5ppm/year