power schottky rectifiers tm microsemi scottsdale division 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941 - 6300, fax: (480) 947 - 1503 page 1 copyright ? 2003 02 - 03 - 2003 rev 0 www. microsemi . com scottsdale division usd520, usd520hr2, usd535, usd535hr2, usd545, USD545HR2, usd550, usd550hr2 description appearance this series of 75 amp rated average forward current series of schottky barrier power rectifiers in 20 through 50 volt selections is ideally suited for output rectifiers and catch diodes in low voltage power supplies. the mic rosemi high conductivity design, using a heavy copper top post and 4 - point crimp, ensures cool thermal operation and low dynamic impedance with applicable heat sinking for peak repetitive forward currents up to 150 amps at 50% duty cycle. this rugged do - 5 hermetically sealed design absorbs stress that can otherwise damage glass - to - metal seals during installation and operation. it is also available in a flexible top lead as described herein. do - 5 important: for the most current data, consult microsem i?s website: http://www.microsemi.com features applications / benefits very low forward voltage (0.6v at 60a, 125 o c ) low recovered charge rugged package design (do - 5) low reverse current (<50ma at rated v r at 125 o c ) hermetically sealed high reliability screening option with hr2 suffix (ie. usd520hr2) available with flexible top lead with f suffix to part number output schottky rectifiers for low voltage power supplies catch diodes for low voltage power supplies high efficiency for low voltage supplies robust construction with heavy copper top post and four - point crimp high peak operating temperature low thermal resistance (0.8 o c /w) high surge current (1000a) absolute maximum ratings mechanical an d packaging dc blocking voltage v r : same as v rwm (see below) peak repetitive forward current i frm : 150 a @ t c = 115 o c (rated v r , sq wave, 20 khz, 50 % duty cycle) average forward current, i f(av) : 75 a @ t c = 115 o c non - repetitive peak surge current (8.3 ms), i fsm : 1000 a peak reverse transient current, i rm : 2 a storage temperature range, t stg : - 55 o c to +200 o c operating junction temperature t j (pk) : 175 o c thermal resistance, junction to case, r ? jc : 0.8 o c /w industry standard do - 5 (do - 203ab) package with 11/16 inch hex and 1/4 - 28 threaded stud hermetically sealed metal and glass case body metal surface finish: tin plated weight: 16 grams (approximate) maximum unlubricated stud torque: 30 inch pounds angular orientation of terminal undefined marking: part number and logo flexible top lead option: add an ?f? suffix to part number (see mechanical specifications on page 3) maximum forward voltage v f maximum reverse current ( pulsed)* i r @ v rwm microsemi part num ber working peak reverse voltage v rwm non repetitive peak reverse voltage v rsm @ i rm @10 a, 25 o c @60 a, 25 o c @60 a, 125 o c @t c = 25 o c @t c = 125 o c maximum capacitance @v r = 5.0 v usd520 usd535 usd545 usd550 usd520hr2 usd535hr2 USD545HR2 usd550hr2 20 v 35 v 45 v 50 v 24 v 42 v 54 v 60 v 0.50 v 0.68 v 0.60 v or 0.63 v with flexible lead option 20 ma 50 ma 50 ma 50 ma 75 ma 4000 pf * duty cycle = 1% electrical characteristics (t case = 25 o c ) usd520 thru usd550
power schottky rectifiers tm microsemi scottsdale division 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941 - 6300, fax: (480) 947 - 1503 page 2 copyright ? 2003 02 - 03 - 2003 rev 0 www. microsemi . com scottsdale division usd520, usd520hr2, usd535, usd535hr2, usd545, USD545HR2, usd550, usd550hr2 ou tline and circuit optional high reliability (hr2) screening the following tests are performed on 100% of the devices. screen mil - std - 750 method conditions 1. high temperature 1032 24 hours @ ta = 150 o c 2. temperature cycle 1051 f, 20 cycles, - 55 to +150 o c . no dwell required @ 25 o c , t > 10 min. @ extremes 3. hermetic seal a. fine leak b. gross leak 1071 h, helium c, liquid 4. thermal impedance 3101 5. interim electrical parameters go/no go as applicable 6. high temperature reverse blocking as a pplicable t=48 hrs, tc=125c with applicable bias conditions 7. final electrical parameters go/no go as applicable usd520 thru usd550
power schottky rectifiers tm microsemi scottsdale division 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941 - 6300, fax: (480) 947 - 1503 page 3 copyright ? 2003 02 - 03 - 2003 rev 0 www. microsemi . com scottsdale division usd520, usd520hr2, usd535, usd535hr2, usd545, USD545HR2, usd550, usd550hr2 mechanical specifications inches millimeters a .225 +/ - .005 5.72 +/ - 0.13 b .060 min. 1.52 min. c .156 +/ - .020 3.96 +/ - 0.51 d .156 min. flat 3.96 min. flat e .667 dia. max 16.94 dia. max. f .090 max 2.29 max. g .677 +/ - .010 17.20 +/ - 0.25 h .375 max. 9.53 max. j .140 min. dia. 3.56 min. dia. k 1.000 max. 25.40 max. l .450 max. 11.43 max. m .438 +/ - .015 11.13 +/ - 0. 38 n .078 max. 1.98 max. flexible top lead (optional) add an ?f? suffix to part number. inches millimeters m .718 max 18.24 max n 4.50 +/ - .250 114.3 +/ - 6.35 p .525 max. 13.23 max. q .675 +/ - .035 17.15 +/ - 0.89 r .205 +/ - .005 5.21 +/ - 0.13 s .075 +/ - .010 1.91 +/ - 0.25 t 1.125 max. 28.58 max. *to 125 o c (ambient) note: consult factory for non - standard lead lengths. do - 5 with flexible lead usd520 thru usd550 notes: 1. cathode is stud 2. maximum unlubricated stud torque: 30 inch pounds. 3. angular orientation of terminal is undefined. 4. maximum tension (90 o ) anode terminal 15 pounds for 30 seconds
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