silicon epibase npn darlington transistor semelab limited reserves the right to change test c onditions, parameter limits and package dimensions without notice. information furnished by semelab is believed to be both accurate and reliable at the time of going to press. however semelab assumes no responsibility for any errors or omissions discovered in its use. semelab encourage s customers to verify that datasheets are current before placing o rders. semelab limited semelab limited semelab limited semelab limited coventry road, lutterworth, leicestershire, le17 4 jb telephone +44 (0) 1455 556565 fax +44 (0) 1455 5526 12 email: sales@semelab-tt.com website: http://www.semelab-tt.com document number 8215 issue 1 page 1 of 2 BDS20 ? high dc current gain ? hermetic metal to-220 package ? designed for general purpose amplifiers and low speed switching applications ? screening options available absolute maximum ratings (t c = 25c unless otherwise stated) v cbo collector ? base voltage 80v v ceo collector ? emitter voltage 80v v ebo emitter ? base voltage 5v i c continuous collector current 5a i b base current 0.1a p d total power dissipation at t c = 25c 35w derate above 25c 0.2w/c t j junction temperature range -65 to +200c t stg storage temperature range -65 to +200c thermal properties symbols parameters min. typ. max. units r jc thermal resistance, junction to case 5 c/w ** this datasheet supersedes document 7603
silicon epibase npn darlington transistor BDS20 semelab limited semelab limited semelab limited semelab limited coventry road, lutterworth, leicestershire, le17 4 jb telephone +44 (0) 1455 556565 fax +44 (0) 1455 5526 12 email: sales@semelab-tt.com website: http://www.semelab-tt.com document number 8215 issue 1 page 2 of 2 electrical characteristics (t c = 25c unless otherwise stated) symbols parameters test conditions min. typ max. units v cb = 80v i e = 0 0.2 v cb = 60v i e = 0 i cbo collector-cut-off current t c = 150c 1.0 i ceo collector-cut-off current v ce = 40v i b = 0 0.5 i ebo emitter-cut-off current v eb = 5v i c = 0 2 ma i c = 0.5a v ce = 3v 1000 h fe (1) forward-current transfer ratio i c = 3a v ce = 3v 1000 i c = 3a i b = 12ma 2 v ce(sat) (1) collector-emitter saturation voltage i c = 5a i b = 20ma 4 v be(sat) (1) base-emitter saturation voltage i c = 5a i b = 20ma 2.8 v be(on) (1) base-emitter on voltage i c = 3a v ce = 3v 3.5 v dynamic characteristics i c = 0.5a v ce = 4v f t transition frequency f = 2mhz 8 mhz notes notes notes notes (1) pulse width 300us, 2% mechanical data dimensions in mm (inches) 16.5 (0.65) 1.5(0.53) 10.6 (0.42) 12.70 (0.50 min) 2.54 (0.1) bsc 3.70 dia. nom 1 2 3 0.8 (0.03) 2.70 (0.106) 1.0 (0.039) 4.6 (0.18) 10.6 (0.42) to220m(to - 257ab) pin 1 ? base pin 2 ? collector pin 3 - emitter
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