npn silicon high voltage transistors BF257, bf 258, bf259 to-39 metal can package intended for video output stages in black and white and in colour television reveivers. absolute maximum ratings (ta=25oc unless specified otherwise) description symbol BF257 bf258 bf259 units collector emitter voltage v ceo 160 250 300 v collector base voltage v cbo 160 250 300 v emitter base voltage v ebo <----------------5----------------> v collector current continuous i c <-------------100---------------> ma peak i cm <------------300----------------> ma total power dissipation @ ta=25oc p d <------------1.0---------------> w derate above 25oc <---------------6.67-------------> mw/oc total power dissipation@ tc=25oc p d <----------------7----------------> w derate above 25oc <---------------46.67-----------> mw/oc operating and storage junction t j , t stg <---------- -65 to +175------> oc temperature range thermal resistance junction to ambient r th(j-a) <----------------150--------------> oc/w junction to case r th(j-c) <----------------21.43-----------> oc/w electrical characteristics (ta=25o c unless specified otherwise) description symbol test condition BF257 bf258 bf259 units collector emitter breakdown voltage bv ceo i c =10ma,i b =0 >160 >250 >300 v collector base breakdown voltage bv cbo i c =100 a, i e =0 >160 >250 >300 v emitter base breakdown voltage bv ebo i e =100 a, ic=0 >5 >5 5 v collector cut off current i cbo v cb =100v, i e =0 <0.05 a v cb =200v, i e =0 <0.05 a v cb =250v, i e =0 <0.05 a dc current gain h fe i c =30ma,v ce =10v all >25 collector emitter saturation voltage v ce(sat) i c =30ma,i b =6ma <1 v dynamic characteristics transition frequency f t i c =15ma, v ce =10v typ f=100mhz 75 mhz collector base capacitance c cb i e =0, v cb =30v,f=1mhz typ 2.5 pf *pulse test: pulse width < 300 s, duty cycle < 2% continental device india limited data sheet page 1 of 3 continental device india limited an iso/ts 16949, iso 9001 and iso 14001 certified company
BF257, bf 258, bf259 to-39 metal can package to-39 metal can package 2 1 3 pin configuration 1. emitter 2. base 3. collector dim min max all dimensions are in mm a 8.50 9.39 b 7.74 8.50 c 6.09 6.60 d 0.40 0.53 e?0.88 f 2.41 2.66 g 4.82 5.33 h 0.71 0.86 j 0.73 1.02 k12.70 ? l 42 deg 48 deg a b c e k d g l h j f 1 2 3 to-39 500 pcs/polybag 540 gm/500 pcs 3" x 7.5" x 7.5" 20k 17" x 15" x 13.5" 32k 40 kgs package net weight/qty details standard pack inner carton box qty outer carton box qty gr wt size size packing detail continental device india limited data sheet page 2 of 3
notes BF257, bf 258, bf259 to-39 metal can package BF257_259rev180701 disclaimer the product information and the selection guides facilitate selection of the cdil's discrete semiconductor device(s) best suited for application in your product(s) as per your requirement. it is recommended that you completely review our data sheet(s) so as to confirm that the device(s) meet functionality parameters for your application. the information furnished in the data sheet and on the cdil web site/cd is believed to be accurate and reliable. cdil however, does not assume responsibility for inaccuracies or incomplete information. furthermore, cdil does not assume liability whatsoever, arising out of the application or use of any cdil product; neither does it convey any license under its patent rights nor rights of others. these products are not designed for use in life saving/support appliances or systems. cdil customers selling these products (either as individual discrete semiconductor devices or incorporated in their end products), in any life saving/support appliances or systems or applications do so at their own risk and cdil will not be responsible for any damages resulting from such sale(s). cdil strives for continuous improvement and reserves the right to change the specifications of its products without prior notic e. cdil is a registered trademark of continental device india limited c-120 naraina industrial area, new delhi 110 028, india. telephone + 91-11-579 6150 fax + 91-11-579 9569, 579 5290 e-mail sales @ cdil.com www.cdil.com continental device india limited data sheet page 3 of 3
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