BY448/by458 standard avalanche sinterglass diode http://www.luguang.cn mail:lge@luguang.cn 949539 features ? glass passivated junction hermetically sealed package lead (pb)-free component component in accordance to rohs 2002/95/ec and weee 2002/96/ec applications high voltage rectification diode efficiency diode in horizontal deflection circuits mechanical data case: sod-57 sintered glass case terminals: plated axial leads, solderable per mil-std-750, method 2026 polarity: color band denotes cathode end mounting position: any weight: approx. 369 mg parts table absolute maximum ratings t amb = 25 c, unless otherwise specified maximum thermal resistance t amb = 25 c, unless otherwise specified part type differentiation package BY448 v r = 1500 v; i fav = 2 a sod-57 by458 v r = 1200 v; i fav = 2 a sod-57 parameter test condition part symbol value unit reverse voltage see electrical characteristics BY448 v r = v rrm 1500 v by458 v r = v rrm 1200 v peak forward surge current t p = 10 ms, half sinewave i fsm 30 a average forward current i fav 2a junction temperature t j 140 c storage temperature range t stg - 55 to + 175 c non repetitive reverse avalanche energy i (br)r = 0.4 a e r 10 mj parameter test condition symbol value unit junction ambient l = 10 mm, t l = constant r thja 45 k/w on pc board with spacing 25 mm r thja 100 k/w e2 http://
BY448/by458 standard avalanche sinterglass diode http://www.luguang.cn mail:lge@luguang.cn electrical characteristics t amb = 25 c, unless otherwise specified typical characteri stics (tamb = 25 c unless otherwise specified) parameter test condition symbol min ty p. max unit forward voltage i f = 3 a v f 1.6 v reverse current v r = v rrm i r 3 a v r = v rrm , t j = 140 c i r 140 a total reverse recovery time i f = 1 a, - d if /d t = 0.05 a/ st rr 20 s reverse recovery time i f = 0.5 a, i r = 1 a, i r = 0,25 a t rr 2 s figure 1. typ. thermal resistance vs. lead length figure 2. forward current vs. forward voltage 94 9101 ll t l = constant 0 0 20 40 60 80 120 r therm. resist. junction/ambient (k/w) thja l - lead length ( mm ) 51015 25 30 20 100 i - forward current ( a ) 0.001 0.01 0.1 1 10 100 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 v f - forward v oltag e(v) 16417 f t j =25 c t j = 150 c figure 3. max. average forward current vs. ambient temperature figure 4. reverse current vs. junction temperature 0 0.5 1.0 1.5 2.0 2.5 16418 r thja = 45 k/w l=10mm r thja = 100 k/w pcb:d=25mm v r =v rrm half sinewave 07 5 5025 125100 150 t amb - ambient temperature ( c) i - average forward current ( a ) fa 1 10 100 1000 25 50 75 100 125 150 t j - junction t emperature ( c) 16419 v r =v rrm i - reverse current ( a) r http://
BY448/by458 standard avalanche sinterglass diode http://www.luguang.cn mail:lge@luguang.cn package dimensions in mm (inches) figure 5. max. reverse power dissipation vs. junction temperature 0 50 100 150 200 250 300 350 400 25 50 75 100 125 150 t j - junction temperature ( c) 16420 v r =v rrm p - reverse power dissipation ( mw ) r p r -limit @100 % v r p r -limit @80%v r figure 6. diode capacitance vs. reverse voltage 0 5 10 15 20 25 30 35 0.1 1 10 100 v r - reverse voltag e(v) 16421 c - diode capacitance ( pf ) d f= 1 mhz cathode identification 0.82 (0.032) max. sintered glass case sod-57 94 9538 26(1.014) min. 26(1.014) min. iso method e 3.6 (0.140)max. 4.0 (0.156) max. http://
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