SM4933-LFR thru sm4937-lfr page: 1 frontier electronics corp. 667 e. cochran street, simi valley, ca 93065 tel: (805) 522-9998 fax: (805) 522-9989 e-mail: frontiersales@frontierusa.com web: http://www.frontierusa.com 1a surface mount fast recovery rectifiers SM4933-LFR thru sm4937-lfr features z fast switching z glass passivated device z ideal for surface mounted applications z low leakage current z fast switching time z rohs mechanical data z case: transfer molded, melf, dimensions in inches and (millimeters) z terminals: solderable per mil-std-750, method 2026 z polarity: cathode indicated by color band z weight: 0.135 grams maximum ratings and electrical characteristics ratings at 25 c ambient temperature unless otherwise specified single phase, half wave, 60 hz, resistive or inductive load. for capacitive load, derate current by 20% ratings symbol SM4933-LFR sm4934-lfr sm4935-lfr sm4936-lfr sm4937-lfr units maximum recurrent peak reverse voltage v rrm 50 100 200 400 600 v maximum rms voltage v rms 35 70 140 280 420 v maximum dc blocking voltage v dc 50 100 200 400 600 v maximum average forward rectified current at tl=75 c i o 1.0 a peak forward surge current, 8.3ms single half sine-wave superimposed on rated load i fsm 30 a typical junction capacitance (note 1) c j 15 pf storage temperature range t stg - 55 to + 150 operating temperature range t op - 55 to + 150 electrical characteristics (a t t a =25 c unless otherwise noted) characteristics symbol SM4933-LFR sm4934-lfr sm4935-lfr sm4936-lfr sm4937-lfr units maximum forward voltage at io dc v f 1.3 v maximum reverse current at 55 i r 5.0 a maximum reverse recovery time (note 2) t rr 150 ns note : 1. measured at 1 mhz and applied reverse voltage 0f 4.0 volts 2. reverse recovery test conditions: i f =0.5a, i r =1.0a, i rr =0.25a solderable ends .105(2.67) .095(2.41) .205(5.2) .190(4.8) .022(.60) .018(.46)
SM4933-LFR thru sm4937-lfr page: 2 rating and characteristic curves SM4933-LFR thru sm4937-lfr fig. 3 - typical reverse characteristics 10 4 1.0 .4 .1 .04 .01 i ns ta n ta n e ous re v er s e cu rre n t ? ( u a ) 0 20 40 60 80 100 120 140 percent of rated peak reverse voltage ? ( % ) fig. 5 - maximum non-repetitive forward surge current 50 40 30 20 10 0 peak f o r w ard su r g e cu rre n t ? ( a ) 1 2 4 6 8 10 20 40 60 80100 number of cycles at 60h z 8.3ms single hhalf 9.sine-wave (jedec method fig. 4 - typical instantaneous forward characteristics 20 10 1.0 0.1 .01 i ns ta n ta n e ous f o r w ard cu rre n t ? ( a ) .6 .8 1.0 1.2 1.4 instantaneous forward voltage ? ( v ) t j =25 pulse width=300 us 1 % d u t y cyc l e reverse voltage ? (v) fig. 6 - typical junction capacitance 200 100 60 40 20 10 6 4 2 1 junction capacitance ? ( p f ) .1 .2 .4 1.0 2 4 10 20 40 100 t j = 25 non inductive oscilloscope ( note 1 ) 50 no inductive 10 no inductive (-) (+) note: 1. rise time=7ns max. input impedance=1 mohms 22pf 2. rise time =10ns max. source impedance=50 ohms set time base for 10/20 ns/cm +0.5a 0 -0.25a -1.0a 1c m trr fig. 1 - test circuit diagram and reverse recovery time characteristic fig. 2 - typical forward current derating curve 1.0 .8 .6 .4 .2 0 average forward currewt ? ( a ) 0 25 50 75 100 125 150 175 terminal temperature ? ( ) single phase half wave 60h z resistive or inductive load t j =25
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