50v-600v super fast rectifiers 2.0a e-mail: sales@taychipst.com web site: www.taychipst.com 1 of 2 sf21 thru sf28 features ! diffused junction ! low forward voltage drop ! ! high reliability ! high surge current capability ! ! terminals: plated leads solderable per mil-std-202, method 208 ! polarity: cathode band ! weight: 0.40 grams (approx.) ! mounting position: any ! marking: type number case: molded plastic high current capability mechanical data maximum ratings and electrical chara cteristics rating 25 c ambient temperature uniess otherwies specified. single phase half wave, 60hz, resistive or inductive load. for capacitive load, derate current by 20%. type number maximum recurrent peak reverse voltage maximum rms voltage maximum dc blocking voltage maximum average forward rectified current .375"(9.5mm) lead length at t a=55 c peak forward surge current, 8.3 ms single half sine-wave superimposed on rated load (jedec method) maximum instantaneous forward voltage at 2.0a maximum dc reverse current t a=25 c at rated dc blocking voltage t a=100 c maximum reverse recovery time (note 1) typical junction capacitance (note 2) 2.0 60 5.0 50 60 -65 +150 a a v m a m a ns pf notes: 1. reverse recovery time test condition: if=0.5a, ir=1.0a, irr=0.25a 2. measured at 1mhz and applied reverse voltage of 4.0v d.c. 35 operating and storage t emperature range t j , t stg c sf21 sf22 sf23 sf24 sf25 sf26 SF27 sf28 units 0.95 1.25 1.50
super fast rectifiers e-mail: sales@taychipst.com web site: www.taychipst.com 50v-600v 2.0a 2 of 2 sf21 thru sf28 0 0. 5 1 . 0 1 . 5 2 . 0 2 .5 25 50 75 100 125 150 175 200 i , average fwd rectified current (a) (av) t , ambient temperature ( c) fig. 1 forward current derating curve a single phase half-wave 60 hz resistive or inductive load 0.01 1 . 0 2 .0 10 0.6 0.8 1.0 1.2 1.4 i , instantaneous forward current (a) f v , instantaneous forward voltage (v) fig. 2 typical forward characteristics f t = 25 c j pulse width = 300 s m sf 2 1- sf 24 SF27 sf 25 - sf26 i , peak forward surge current (a) fsm 0 20 40 60 1 10 100 number of cycles at 60hz fig. 3 peak forward surge current 1 10 100 1 10 100 c , capacitance (pf) j v , reverse voltage (v) fig. 4 typical junction capacitance r t = 25 c f = 1.0mhz j sf 2 1 - sf24 sf25 - SF27 fig.5- test circuit diagram and reverse recovery time characteristic fig.6-typical forward current a v e r a g e f o r w a r d c u r r e n t , ( a ) 0.4 0.8 1.2 1.6 2.0 2.4 (+) (+) 25vdc (approx.) ( ) ( ) 10 noninductive 50 noninductive w w pulse generator (note 2) oscilliscope (note 1) 1 non- inductive w notes: 1. rise time= 7ns max., input impedance= 1 megohm.22pf. 2. rise time= 10ns max., source impedance= 50 ohms. +0.5a 0 -0.25a -1.0a | | | | | | | | 1cm set time base for 50 / 10ns / cm trr d.u.t. single phase half wave 60hz resistive or inductive load 0.375"(9.5mm) lead length derating curve ambient temperature,( c) 0 0 25 50 75 100 125 150 175
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