rl251 thru rl257 general purpose silicon rectifier reverse voltage - 50 to 1000 volts forward current - 2.5 amperes case : jedec r-3 molded plastic body terminals : plated axial leads, solderable per mil-std-750, method 2026 polarity : color band denotes cathode end mounting position : any weight :0.012 ounce, 0.58 grams the plastic package carries underwriters laboratory flammability classification 94v-0 construction utilizes void-free molded plastic technique low reverse leakage high forward surge current capability high temperature soldering guaranteed: 250 c/10 seconds,0.375 ? (9.5mm) lead length, 5 lbs. (2.3kg) tension features mechanical data maximum ratings and electrical characteristics r-3 dimensions in inches and (millimeters) 50 35 50 100 70 100 200 140 200 400 280 400 600 420 600 800 560 800 1000 700 1000 rl 251 volts volts volts symbols units amps amps volts v rrm v rms v dc i (av) i fsm v f 2.5 150.0 1.1 operating junction and storage temperature range maximum repetitive peak reverse voltage maximum rms voltage maximum dc blocking voltage maximum average forward rectified current 0.375 ? (9.5mm) lead length at t a =75 c peak forward surge current 8.3ms single half sine-wave superimposed on rated load (jedec method) maximum instantaneous forward voltage at 2.5a maximum dc reverse current t a =25 c at rated dc blocking voltage t a =100 c typical junction capacitance (note 1) note: 1.measured at 1mhz and applied reverse voltage of 4.0v d.c. 2.thermal resistance from junction to ambient at 0.375 ? (9.5mm)lead length,p.c.b. mounted i r 5.0 50.0 r q ja c j t j , t stg 35.0 35.0 -50 to +150 pf c a m typical thermal resistance (note 2) c/w rl 252 rl 254 rl 253 rl 255 rl 257 rl 256 ratings at 25 c ambient temperature unless otherwise specified. single phase half-wave 60hz,resistive or inductive load,for capacitive load current derate by 20%. mdd electronic mdd catalog number m i n . 1 . 0 ( 25 . 4 ) 0 . 160 ( 4 . 1) 0 . 040 ( 1 . 0) 0 . 042 ( 1 . 1) 0 . 160 ( 4 . 1 ) 0 . 138 ( 3 . 5 ) 0 . 138 ( 3 . 5) m i n . 1 . 0 ( 25 . 4 )
ratings and characteristic curves rl251 thru rl257 mdd electronic i n s t a n t a n e o u s fo r w a rd v o l t a g e / v o l t s t j = 25 p u l s e w i d t h = 300 s 20 4 .0 1 .0 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 / f i g . 1 -- t yp i ca l fo r w ard charac t e r i s t ic 1 .0 1 .2 0 .8 a m p e r e s 0 .1 0 .4 0 . 04 0 0 .6 125 1 s in g l e p ha s e ha l f w a v e 60hz 100 125 150 75 4 amb i e n t t empe r a t ur e / 0 3 0 . 04 0 .1 25 50 2 .0 1 a v e r a g e f o r w a r d r e c t i f i e d c u r r e n t a m p e r e s 200 0 175 re s i s t i v e o r i n d u c t i v e load f i g . 3 -- fo r w ard curr e n t d e ra t i n g cur ve 0 .1 1 10 100 200 tj=25 f=1.0mhz vsig=50mvp-p 1 0 . 01 0 p e a k f o r w a r d s u r g e c u r r e n t a m p e r e s f i g . 2 -- pe ak fo r w ard s ur g e curr e n t 200 150 t j = 125 8 . 3 ms s in g le 100 ha l f s in g - w a ve 50 0 1 .0 2 .0 100 nu mbe r of c y cl es a t 60h z 10 20 40 80 j u n c t i o n c a p a c i t a n c e ( p f ) 100 10 20 40 fig.4-typical junction capacitance fig.5-typical reverse characteristics 10 c a p a c i t a n c e . p f 0 .4 25 50 75 100
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