schottky rectifier 35 amp, 45v 35scgq045 the 35scgq045 center tap schottky rectifier has been expressly designed to meet the rigorous requirements of hi-rel environments. it is packaged in the hermetic isolated to-254aa package. the device's forward voltage drop and reverse leakage current are optimized forthe lowest power loss and the highest circuit efficiency for typical high frequency switching power supplies and resonent power converters. full mil-prf-19500 quality conformance testing is available on source control drawings to tx, txv and s quality levels. ? hermetically sealed ? center tap ? low forward voltage drop ? high frequency operation ? guard ring for enhanced ruggedness and long term reliability ? lightweight major ratings and characteristics description/features case style www.irf.com 1 characteristics 35scgq045 units i f(av) 35 a v rrm (per leg) 45 v i fsm @ tp = 8.3ms half-sine (per leg) 200 a v f @ 30apk, t j =125c 0.74 v (per leg) t j ,t stg operating and storage -55 to 150 c high efficiency series pd-93965a case outline and dimensions - to-254aa 6.60 [.260] 6.32 [.249] 1.27 [.050] 1.02 [.040] 0.12 [.005] 13.84 [.545] 13.59 [.535] 13.84 [.545] 13.59 [.535] 3.81 [.150] 2x 17.40 [.685] 16.89 [.665] a 1.14 [.045] 0.89 [.035] 0.36 [.014] b a 3x b 20.32 [.800] 20.07 [.790] 3.78 [.149] 3.53 [.139] 123 17.40 [.685] 16.89 [.665] 3.81 [.150] 0.84 [.033] max . c
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35scgq045 2 www.irf.com part number 35scgq045 v r max. dc reverse voltage (v) (per leg) v rwm max. working peak reverse voltage (v) (per leg) voltage ratings 45 parameters limits units conditions i f(av) max. average forward current 35 a 50% duty cycle @ t c = 116 c, square waveform see fig. 5 i fsm max. peak one cycle non - repetitive 200 a @ t p = 8.3 ms half-sine surge current (per leg) absolute maximum ratings pulse width < 300s, duty cycle < 2% parameters limits units conditions v fm max. forward voltage drop 0.61 v @ 15a t j = -55c (per leg) see fig. 1 0.74 v @ 30a 0.54 v @ 15a t j = 25c 0.73 v @ 30a 0.47 v @ 15a t j = 125c 0.74 v @ 30a i rm max. reverse leakage current 0.70 ma t j = 25c (per leg) see fig. 2 75 ma t j = 100c v r = rated v r 160 ma t j = 125c c t max. junction capacitance (per leg) 2000 pf v r = 5v dc ( 1mhz, 25c ) l s typical series inductance (per leg) 7.8 nh measured from anode lead to cathode lead 6mm ( 0.025 in.) from package electrical specifications parameters limits units conditions t j max.junction temperature range -55 to 150 c t stg max. storage temperature range -55 to 150 c r thjc max. thermal resistance, junction 1.25 c/w dc operation see fig. 4 to case (per leg) r thjc max. thermal resistance, junction 0.63 c/w dc operation to case (per package) wt weight (typical) 9.3 g die size (typical) 150x180 mils thermal-mechanical specifications case style to-254aa
35scgq045 www.irf.com 3 fig. 2 - typical values of reverse current vs. reverse voltage (per leg) fig. 3 - typical junction capacitance vs. reverse voltage (per leg) fig. 1 - max. forward voltage drop characteristics (per leg) 0.0 0.2 0.4 0.6 0.8 1.0 forward voltage drop - v f (v) 1 10 100 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 - i f ( a ) tj = -55c tj = 125c tj = 25c 0 10 20 30 40 50 reverse voltage - v r (v) 0.01 0.1 1 10 100 1000 r e v e r s e c u r r e n t - i r ( m a ) 125c 75c 25c 100c 0 10 20 30 40 50 reverse voltage -v r (v) 100 1000 10000 j u n c t i o n c a p a c i t a n c e - c t ( p f ) t j = 25c
35scgq045 4 www.irf.com fig. 5 - max. allowable case temperature vs. average forward current (per leg) fig. 4 - max. thermal impedance z thjc characteristics (per leg) 0.01 0.1 1 10 0.00001 0.0001 0.001 0.01 0.1 1 notes: 1. duty factor d = t / t 2. peak t = p x z + t 1 2 j dm thjc c p t t dm 1 2 t , rectangular pulse duration (sec) thermal response (z ) 1 thjc 0.01 0.02 0.05 0.10 0.20 d = 0.50 single pulse (thermal response) 0 10 20 30 40 50 60 average forward current - i f(av) (a) 0 20 40 60 80 100 120 140 160 180 a l l o w a b l e c a s e t e m p r a t u r e - ( c ) 35scgq045 r thjc = 1.25c/w dc world headquarters: 233 kansas st., el segundo, california 90245, tel: (310) 252-7105 ir leominster: 205 crawford st., leominster, massachusetts 01453, tel: (978) 534-5776 data and specifications subject to change without notice. 07/2005
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