UK8A-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 8a ultra fast recovery surface mount rectifier UK8A-LFR features z low profile package z plastic package has underwriters laboratory 94v-0 z ideal for surface mounted application z glass passivated chip junction z built-in strain relief design z ultra fast recovery time for high efficient z high temperature soldering: 250c/10 seconds at terminals z rohs mechanical data z case: tsmc, dimensions in inches and (millimeters) z terminals: solder plated z polarity: indicated by cathode band z weight: 0.10 grams maximum ratings and electrical characteristics ratings at 25 c ambient temperature unless otherwise specified single phase, half wave, 60 hz, resistive or inductive l oad. for capacitive load, derate current by 20% ratings symbol UK8A-LFR units maximum recurrent peak reverse voltage v rrm 50 v maximum rms voltage v rms 35 v maximum dc blocking voltage v dc 50 v maximum average forward rectified current at t l =75 c i o 8.0 a peak forward surge current, 8.3ms single half sine-wave superimposed on rated load i fsm 120 a typical junction capacitance (note 1) c j 75 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 UK8A-LFR units maximum forward voltage at i o dc v f 0.95 v maximum dc reverse current at ta=25oc i r 5 a maximum dc reverse current at ta=125 c i r 250 a maximum reverse recovery time (note 3) t rr 50 ns marking uk8a notes: 1. measured at 1 mhz and applie d reverse voltage 0f 4.0 volts 2. reverse recovery test conditions: i f =0.5a, i r =1.0a, i rr =0.25a .244(6.2) .228(5.8) .283(7.2) .260(6.6) .04(1.0) typ .189(4.8) .165(4.2) cathode .098(2.5) .075(1.9) .012(0.3) typ .320(8.12) ref .06(1.52) min .158(4.02) min soldering pad .185(4.69) max
UK8A-LFR page: 2 ratings and characteristic curve UK8A-LFR .1 .2 .4 1.0 2 4 10 20 40 100 reverse voltage (v) fig. 3-typical reverse characteristics 0 20 40 60 80 100 120 140 percent of rated peak reverse voltage (%) 100 10 1.0 .1 .01 instantaneous reverse current (ua) 0 20 40 60 80 100 120 140 160 180 20 0 average forward current (a) 8.0 4.0 0 lead temperature (oc) fig. 2-typical forward current derating curve fig. 1-test circuit diagram and reverse recovery time characteristic pulse generator ( note 2 ) (+) 25 v dc (approx) (-) d.u.t. 1 non inductive oscilloscope ( note 1 ) 50 no inductive 10 no inductive (-) (+) +0.5a 0 -0.25a -1.0a trr 1cm set time base for 10/20 ns/cm note: 1. rise time=7ns max. input impedance=1 mohms 22pf 2. rise time =10ns max. source impedance=50 ohms single phase half wave 60hz resistive or inductive load p.c.b mounted on 0.30.3?(8.08.0mm) copper pad areas fig. 6-typical junction capacitance 200 100 40 20 10 6 4 2 1 junction capacitance (pf) t j =25 o c fig. 5-maximum non-repetitive forward surge current 120 96 72 48 24 0 peak forward surge current (a) 0 10 100 number of cycles at 60h z 8.3 ms single half sine wave (jedec method) fig. 4-typical instantaneous forward characteristics .2 .4 .6 .8 1.0 1.2 1.4 1.6 1.8 2.0 instantaneous forward voltage (v) 10 1.0 0.1 .01 .001 instantaneous forward current (a) t j =25 o c t j =125 o c t j =80 o c
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