controlled avalanche diodes bax12/BAX12A symbol value unit v rrm 90 v v r 90 v continuous forward current i f 400 ma repetitive peak forward current i frm 800 a non-repetitive peak forward current t = 1 s55 square wave: tj = 25 c prior to surge t = 100 s15 t = 10 ms 9 total power dissipation , ta = 25 c p tot 450 mw i rrm 600 ma junction temperature t j 200 c storage temperature range t s -65 to + 200 c note : ( 1 ) device mounted on an fr4 p rinted circuit-board; lead len g th 10 mm. electrical characteristics (t j = 25c unless otherwise noted) parameter symbol min. max. unit reverse avalanche bax12 i r = 1ma 120 170 v breakdown voltage BAX12A i r = 0.1ma 120 170 v v r = 90 v - 100 na v r = 90 v, tj = 150 c - 100 a forward voltage v f i f = 400 ma - 1.25 v diode capacitance cd - 35 pf i f = 30ma , i r = 30ma r l = 100 ? measured at i r = 3 ma a repetitive peak reverse current v (br)r i fsm ns 50 - test condition reverse recovery time trr f = 1mhz ; v r = 0 i r parameter reverse current repetitive peak reverse voltage continuous reverse voltage maximum ratings @ t a = 25c unless otherwise specified ! ! ! ! ! ! ! switching speed: max. 50 ns continuous reverse voltage: max. 90v repetitive peak reverse voltage: max. 90v repetitive peak forward current: max.800 ma repetitive peak reverse current: max.600ma ! case : do-35 glass case lead : axial lead solderable per mil-std-202, polarity : color band denotes cathode end mounting position : any weight : 0.13 gram (approximately) ! ! features mechanical data 0.079(2.0) max 0.020(0.52) typ 0.165 (4.2) max 1.0 2(26.0) min. 1.0 2(26.0) min. do-35(glass) dimensions in millimeters 1 of 2 www.sunmate.tw method 208 guaranteed
rating and characteristic curves ( bax12, BAX12A ) fig.1 - maximum permissible continuous forward fig.2 - forward current as a function current as a function of ambient temperature. of forward voltage. fig.3 - reverse current as a function fig.4 - diode capacitance as a function of of junction temperature. reverse voltage; typical values. fig.5 - maximum permissible non-repetitive peak forward current as a function of pulse duration. device mounted on an fr4 printed - circuit board; lead length 10mm. (1) tj = 175c; typical values. (2) tj = 25c; typical values. (3) tj = 25c; maximum values. based on square wave currents. tj = 25 c prior to surge. v r = 90 . solid line: maximum values. dotted line: typical values. f = 1 mhz; tj = 25 2 of 2 www.sunmate.tw
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