copyright & copy;2000 shindengen electric mfg.co.ltd ratings shindengen outline dimensions (unit : mm) smd varistor vr61f1 case : 1f absolute maximum ratings item symbol conditions ratings unit storage temperature tstg -55 1 50 junction temperature tj 1 50 ta = 25 , sine wave, r-load, commercial frequency, 0.37 average rectified forward current i o on alumina substrate arms ta = 25 , sine wave, r-load, commercial frequency, 0.28 on glass-epoxy substrate 50hz, sine wave, non-repetitive 7.5 arms peak surge forward current i fsm 1 0/200 s, non-repetitive 60 a 1 0/ 1 000 s, non-repetitive 30 a electrical characteristics (tl=25 ) item symbol conditions ratings unit i f = 1 ma 2.05 2.55 forward voltage v f i f = 1 0ma 2.50 3.00 v i f = 70ma 2.85 3.35 junction capacitance cj f = 1 00khz, v d = 1 v, osc = 50ma typ 1 5pf junction to ambient, on alumina substrate max 1 08 thermal resistance ja /w junction to ambient, on glass-epoxy substrate max 1 57
forward voltage 0.1 1 10 100 1000 0 1 2 3 4 5 VR-61F1 pulse measurement tl=150 c [typ] tl=25 c [typ] forward voltage v f [v] forward current i f [ma]
junction capacitance 0 4 8 12 16 20 24 VR-61F1 100 1000 10000 0.05 0.5 0.2 20 50 5 2 200 500 2000 5000 0.02 0.05 0.5 0.2 20 5 2 0.005 0.002 typ tl = 25 c dc = 1v frequency f [mhz] junction capacitance cj [pf]
peak surge forward capability 0 2 4 6 8 10 12 14 16 1 10 100 VR-61F1 2 5 20 50 i fsm 10ms 10ms 1 cycle number of cycles [cycles] peak surge forward current i fsm (rms) [a] non-repetitive, sine wave, tj=25 c before surge current is applied
forward power dissipation 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 0 0.1 0.2 0.3 0.4 0.5 VR-61F1 tj=150 c sine wave average rectified forward current i o (rms) [a] power dissipation p [w]
0 0.1 0.2 0.3 0.4 0.5 0 50 100 150 VR-61F1 derating curve sine wave r-load free in air alumina substrate glass-epoxy substrate alumina substrate soldering land 2mm f conductor layer 20 m m substrate thickness 0.64mm glass-epoxy substrate soldering land 2mm f conductor layer 35 m m ambient temperature ta [ c] average rectified forward current i o (rms) [a]
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