schottky rectifier 120 amp 124NQ...(r) series bulletin pd-2.290 rev. b 03/01 1 www.irf.com major ratings and characteristics i f(av) rectangular 120 a waveform v rrm range 35 to 45 v i fsm @ tp = 5 s sine 27,000 a v f @ 120apk, t j =100c 0.52 v t j range - 55 to 125 c characteristics 124NQ...(r) units the 124NQ... (r) high current schottky rectifier modules have been optimized for extremely low forward voltage drop, with higher leakage. the proprietary barrier technology allows for reliable operation up to 125 c junction temperature. typical applications are in switching power supplies, converters, free- wheeling diodes, welding, and reverse battery protection. 125 c t j operation unique high power half pak module high purity, high temperature epoxy encapsulation for en hanced mechanical strength and moisture resistance extremely low forward voltage drop high frequency operation guard ring enhanced ruggedness and long term reliability description/features d-67 outline d-67 half pak module dimensions in millimeters and (inches) 124NQ045 lug terminal anode base cathode 124NQ045r lug terminal cathode base anode
124NQ... series bulletin pd-2.290 rev. b 03/01 2 www.irf.com t j max. junction temperature range -55 to 125 c t stg max. storage temperature range -55 to 125 c r thjc max. thermal resistance junction 0.40 c/w dc operation * see fig. 4 to case r thcs typical thermal resistance, case to 0.15 c/w mounting surface , smooth and greased heatsink wt approximate weight 25.6 (0.9) g (oz.) t mounting torque min. 40 (35) non-lubricated threads max. 58 (50) terminal torque min. 58 (50) max. 86 (75) case style half pak module thermal-mechanical specifications parameters 124NQ units conditions kg-cm (ibf-in) v fm max. forward voltage drop (1) 0.54 v @ 120a * see fig. 1 0.71 v @ 240a 0.52 v @ 120a 0.71 v @ 240a i rm max. reverse leakage current (1) 10 ma t j = 25 c * see fig. 2 1200 ma t j = 125 c c t max. junction capacitance 5200 pf v r = 5v dc , (test signal range 100khz to 1mhz) 25 c l s typical series inductance 7.0 nh from top of terminal hole to mounting plane dv/dt max. voltage rate of change 10,000 v/ s (rated v r ) t j = 25 c t j = 100 c v r = rated v r parameters 124NQ units conditions (1) pulse width < 300s, duty cycle < 2% electrical specifications i f(av) max. average forward current 120 a 50% duty cycle @ t c = 76 c, rectangular wave form * see fig. 5 i fsm max. peak one cycle non-repetitive 27,000 5s sine or 3s rect. pulse surge current * see fig. 7 2400 10ms sine or 6ms rect. pulse e as non-repetitive avalanche energy 135 mj t j = 25 c, i as = 20 amps, l = 0.67 mh i ar repetitive avalanche current 20 a current decaying linearly to zero in 1 sec frequency limited by t j max. v a = 1.5 x v r typical parameters 124NQ units conditions absolute maximum ratings a following any rated load condition and with rated v rrm applied part number 124NQ035 124NQ040 124NQ045 v r max. dc reverse voltage (v) v rwm max. working peak reverse voltage (v) 35 40 45 voltage ratings
124NQ... series bulletin pd-2.290 rev. b 03/01 3 www.irf.com fig. 2 - typical values of reverse current vs. reverse voltage fig. 3 - typical junction capacitance vs. reverse voltage fig. 4 - maximum thermal impedance z thjc characteristics fig. 1 - maximum forward voltage drop characteristics 1 10 100 1000 0.1.2.3.4.5.6.7.8.911.1 fm f instantaneous forw ard current - i (a) forw ard vol tage drop - v (v) t = 125c t = 100c t = 25c j j j .01 .1 1 10 100 1000 0 5 10 15 20 25 30 35 40 4 5 r r 100c 75c 50c 25c reverse vol tage - v (v) rever se c urrent - i (m a) t = 125c j 1000 10000 0 1020304050 t = 25c j reverse vol tage - v (v) r t junction capaci tance - c (pf) .001 .01 .1 1 .00001 .0001 .001 .01 .1 1 10 100 d = 0. 33 d = 0. 50 d = 0. 25 d = 0. 17 d = 0. 08 1 thjc t , rectangul ar pul se durati on (seconds) therm al im pedance - z (c /w ) single pulse (therm al resi stance) 2 t 1 t p d m n otes: 1. duty factor d = t / t 2. peak t = p x z + t 1 jdm thjc c 2
124NQ... series bulletin pd-2.290 rev. b 03/01 4 www.irf.com fig. 8 - unclamped inductive test circuit fig. 5 - maximum allowable case temperature vs. average forward current fig. 6 - forward power loss characteristics fig. 7 - maximum non-repetitive surge current 80 90 100 110 120 130 0 25507510012515017 5 d c al l owabl e c ase tem perature - (c) average forw ard current - i (a) f(av) 124NQ r (d c) = 0.40c/w thjc 0 20 40 60 80 100 0 25 50 75 100 125 150 17 5 dc average power loss - (w atts) f(av) d = 0. 08 d = 0. 17 d = 0. 25 d = 0. 33 d = 0. 50 rm s li m it average forward current - i (a) 1000 10000 100000 10 100 1000 10000 fsm p non-repetitive surge current - i (a) at any rated load condition and with rated v applied following surge rrm square wave pulse duration - t (microsec) free-wheel d io d e 40hfl40s02 current monitor high-speed sw itch irfp460 l dut rg = 25 ohm vd = 25 volt +
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