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Features 
High reliability by means of resistance weld hermetic seal. 
Excellent aging characteristics. RoHS compliant and lead free. Type HC-49/U，HC-49/T，HC-49/T3Freq. range Fundamental
3rd
5th1.8432 ~ 48.0MHz
26.0 ~ 90.0MHz
80.0 ~ 176.0MHzVibration mode AT cut , Fundamental , 3rd , 5thFrequency tolerance （at 25°C） -/+10ppm , -/+30ppm , or specifyEquivalent series resistance See table No.1Frequency stability over
operating temperature range-/+10ppm , -/+30ppm , or specifyOperating temperature range -10 ~ +60°C , or specifyDrive Level 1000uW Max.Shunt capacitance 7.0pF Max.Load capacitance 16pF, 18pF, 20pF, or specifyAging -/+2ppm/year , -/+5ppm/yearEquivalent series resistance(ESR) Table No.1Frequency Mode ESR 1.8432 MHz Fundamental 500 ohms Max. 2.0~2.9 MHz Fundamental 350 ohms Max. 3.0~3.1 MHz Fundamental 200 ohms Max. 3.2~3.9 MHz Fundamental 150 ohms Max. 4.0~4.4 MHz Fundamental 100 ohms Max. 4.5~4.9 MHz Fundamental 80 ohms Max. 5.0~6.9 MHz Fundamental 50 ohms Max. 7.0~9.9 MHz Fundamental 35 ohms Max. 10.0~48.0 MHz Fundamental 25 ohms Max. 26.0~90.0 MHz 3rd 70 ohms Max. 80.0~176.0 MHz 5th 120 ohms Max.
