1.0 amp f ast recovery rectifiers 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=75 c fea tures mechanical da t a peak forward surge current, 8.3 ms single half sine-wave superimposed on rated load (jedec method) maximum instantaneous forward voltage at 1.0a 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) 1.0 30 5.0 100 150 250 500 15 -65 +150 a v ns pf c * low forward voltage drop * low leakage current * high reliability * high current capability * case: molded plastic * epoxy: ul 94v-0 rate flame retardant * lead: axial leads, solderable per mil-std-202, method 208 guranteed * polarity: color band denotes cathode end * mounting position: any 1n4942 thru 1n4948 1.3 v v units v 1n4942 1n4944 1N4946 1n4947 1n4948 200 400 600 800 1000 200 400 600 800 1000 140 280 420 560 700 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. vol t age range 200 to 1000 volts current 1.0 ampere a do-41 dimensions in inches and (millimeters) 1.0(25.4) min. 1.0(25.4) min. .205(5.2) .166(4.2) .034(.9) .028(.7) dia. .107(2.7) .080(2.0) dia. operating and storage t emperature range t j , t stg a a 170
0.1 1.0 .01 10 50 rating and characteristic curves (1n4942 thru 1n4948) characteristics fig.2-typical forward current dera ting curve a v e r a g e f o r w a r d c u r r e n t , ( a ) fig.5-typical junction capacit ance reverse voltage,(v) j u n c t i o n c a p a c i t a n c e , ( p f ) i n s t a n t a n e o u s f o r w a r d c u r r e n t , ( a ) forward volt age,(v) pulse width 300us 1% duty cycle 0.2 0.4 0.6 0.8 1.0 1.2 35 30 25 20 15 10 5 0 .01 .05 .1 .5 1 5 10 50 100 .6 .8 1.0 1.2 1.4 1.6 1.8 2.0 3.0 fig.3- test circuit diagram and reverse recovery time characteristics tj=25 c single phase half wave 60hz resistive or inductive load 0.375"(9.5mm) lead length (+) (+) 25vdc (approx.) ( ) ( ) 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. 10 noninductive 50 noninductive w w 0 20 40 60 80 100 120 140 160 180 200 0 fig.1-typical forward ambient temperature,( c) fig.4-maximum non-repetitive forward surge current 6 0 12 18 24 30 number of cycles at 60hz 1 10 5 50 100 tj=25 c 8.3ms single half sine wave jedec method p e a k f o r w a r d s u r g e c u r r e n t , ( a ) 171
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