document number: 86006 for technical ques tions within your region, please cont act one of the following: www.vishay.com rev. 1.7, 09-aug-10 diodesamericas@vishay.com , diodesasia@vishay.com , diodeseurope@vishay.com 147 standard avalanche sinterglass diode by448 , BY458 vishay semiconductors mechanical data case: sod-57 terminals: plated axial leads, solderable per mil-std-750, method 2026 polarity: color band denotes cathode end mounting position: any weight: approx. 369 mg features ? glass passivated junction ? hermetically sealed package ? compliant to rohs directive 2002/95/ec and in accordance to weee 2002/96/ec ? halogen-free according to iec 61249-2-21 definition applications ? high voltage rectification ? efficiency diode in horizontal deflection circuits 949539 parts table part type differe ntiation package by448 v r = 1500 v; i fav = 2 a sod-57 BY458 v r = 1200 v; i fav = 2 a sod-57 absolute maximum ratings (t amb = 25 c, unless otherwise specified) 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 sine wave 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 l (br)r = 0.4 a e r 10 mj maximum thermal resistance (t amb = 25 c, unless otherwise specified) 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 electrical characteristics (t amb = 25 c, unless otherwise specified) parameter test condition symbol min. typ. max unit forward voltage i f = 3 a v f --1.6v reverse current v r = v rrm i r --3a v r = v rrm , t j = 140 c i r - - 140 a reverse recovery time i f = 0.5 a, i r = 1 a, i r = 0.25 a t rr - - 2000 ns total reverse recovery time i f = 1 a, - di f /dt = 0.05 a/s t rr - - 20 s
www.vishay.com for technical qu estions within your region, please contact one of the fo llowing: document number: 86006 148 diodesamericas@vishay.com , diodesasia@vishay.com , diodeseurope@vishay.com rev. 1.7, 09-aug-10 by448 , BY458 vishay semiconductors standard avalanche sinterglass diode typical characteristics (t amb = 25 ? c, unless otherwise specified) fig. 1 - typ. thermal re sistance vs. lead length fig. 2 - forward current vs. forward voltage fig. 3 - max. average forward current vs. ambient temperature fig. 4 - reverse current vs. junction temperature fig. 5 - max. reverse power dissipation vs. junction temperature fig. 6 - diode capacitance vs. reverse voltage 0 20 40 80 60 100 120 15 10 5 0 202530 r thja - ther. re s i s t. junction/ambient (k/w) l - lead length (mm) 949101 ll t l = con s tant 0.001 0.01 0.1 1 10 100 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 16417 v f - forward voltage (v) i f - forward current (a) t j = 150 c t j = 25 c 0 0.5 1.0 1.5 2.0 2.5 16418 075 50 25 125 100 150 t amb - ambient temperature (c) i fav - average forward current (a) v r = v rrm half s ine wave r thja = 45 k/w l = 10 mm r thja = 100 k/w pcb: d = 25 mm 1 10 100 1000 25 50 75 100 125 150 16419 t j - junction temperature (c) i r - rever s e current (a) v r = v rrm 0 50 100 150 200 250 300 350 400 25 50 75 100 125 150 16420 t j - junction temperature (c) p r - rever s e power di ss ipation (mw) v r = v rrm p r - limit at 100 % v r p r - limit at 80 % v r 0 5 10 15 20 25 30 35 0.1 1 10 100 16421 v r - rever s e voltage (v) c d - diode capacitance (pf) f = 1 mhz
by448 , BY458 standard avalanche sinterglass diode vishay semiconductors document number: 86006 for technical ques tions within your region, please cont act one of the following: www.vishay.com rev. 1.7, 09-aug-10 diodesamericas@vishay.com , diodesasia@vishay.com , diodeseurope@vishay.com 149 package dimensions in millimeters (inches): sod-57 20543 3.6 (0.142) max. 26 (1.024) min. 4 (0.157) max. 26 (1.024) min. 0.82 (0.032) max.
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