ds30118 rev. 7 - 2 1 of 3 bas19w - BAS21W www.diodes.com diodes incorporated mechanical data bas19w - BAS21W surface mount fast switching diode case: sot-323, molded plastic case material - ul flammability rating classification 94v-0 moisture sensitivity: level 1 per j-std-020a terminals: solderable per mil-std-202, method 208 also available in lead free plating (matte tin finish). please see ordering information, note 4, on page 3 terminal connections: see diagram bas19w marking: ka8 or kt2 or kt3 (see page 3) bas20w marking: kt2 or kt3 (see page 3) BAS21W marking: kt3 (see page 3) weight: 0.006 grams (approx.) fast switching speed surface mount package ideally suited for automatic insertion for general purpose switching applications high conductance also available in lead free version sot-323 dim min max a 0.25 0.40 b 1.15 1.35 c 2.00 2.20 d 0.65 nominal e 0.30 0.40 g 1.20 1.40 h 1.80 2.20 j 0.0 0.10 k 0.90 1.00 l 0.25 0.40 m 0.10 0.18 0 8 all dimensions in mm top view a m j l f d b c h k g characteristic symbol min max unit test condition reverse breakdown voltage (note 2) bas19w bas20w BAS21W v (br)r 120 200 250 v i r = 100 a forward voltage (note 2) v f 1.0 1.25 v i f = 100ma i f = 200ma reverse current @ rated dc blocking voltage (note 2) i r 100 15 na a t j = 25 c t j = 100 c total capacitance c t 5.0 pf v r = 0, f = 1.0mhz reverse recovery time t rr 50 ns i f = i r = 30ma, i rr = 0.1 x i r ,r l = 100 electrical characteristics characteristic symbol bas19w bas20w BAS21W unit repetitive peak reverse voltage v rrm 120 200 250 v working peak reverse voltage dc blocking voltage v rwm v r 100 150 200 v rms reverse voltage v r(rms) 71 106 141 v forward continuous current (note 1) i fm 400 ma average rectified output current (note 1) i o 200 ma non-repetitive peak forward surge current @ t = 1.0 s @ t = 1.0s i fsm 2.5 0.5 a repetitive peak forward surge current i frm 625 ma power dissipation p d 200 mw thermal resistance junction to ambient air (note 1) r ja 625 c/w operating and storage temperature range t j ,t stg -65 to +150 c maximum ratings @ t a = 25 c unless otherwise specified @ t a = 25 c unless otherwise specified notes: 1. part mounted on fr-4 pc board with minimum recommended pad layout, which can be found on our website at http:/www.diodes.com/datasheets/ap02001.pdf. 2. short duration test pulse used to minimize self-heating effect. features
ds30118 rev. 7 - 2 2 of 3 bas19w - BAS21W www.diodes.com 0.0001 0.01 0.001 0.1 1 10 100 0 50 100 200 150 250 v , instantaneous reverse voltage (v) r fig. 2 typical reverse characteristics t = -40oc a t = 25oc a t = 75oc a t = 125oc a t = 150oc a t = 0oc a 0.0 0.5 1.0 1.5 3.5 3.0 2.5 2.0 4. 0 0 10 20 40 30 c , total capacitance (pf) t v , reverse voltage (v) r fi g .3 t y pical capacitance vs. reverse volta g e f = 1.0mhz 0 100 200 250 200 150 50 100 0 t , ambient temperature ( c) a fig. 4 power derating curve, total package p,p o wer dissipati o n (mw) d 0.001 0.01 0.1 1 0 0.4 0.2 0. 6 i , instantane o us f o rward current (a) f v , instantaneous forward voltage (v) f fig. 1 typical forward characteristics 0.8 1.2 1.0 1. 4 t = 0oc a t = 150oc a t = -40oc a t = 25oc a t = 75oc a t = 125oc a
ds30118 rev. 7 - 2 3 of 3 bas19w - BAS21W www.diodes.com month jan feb march apr may jun jul aug sep oct nov dec code 12345 6789ond year 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 code lmn p r s tuvw date code key xxx = product type marking code (see page 1 diagrams) ym = date code marking y = year ex: n = 2002 m = month ex: 9 = september xxx ym marking information notes: 3. for packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf. 4. for lead free version (with lead free terminal finish) part number, please add "-f" suffix to part number a bove. example: BAS21W-7-f. device packaging shipping bas19w-7 sot-323 3000/tape & reel bas20w-7 sot-323 3000/tape & reel BAS21W-7 sot-323 3000/tape & reel (note 3) ordering information
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